tag:blogger.com,1999:blog-6816798481858640752024-03-05T04:08:17.414-08:00PaleosurPaleosurLeonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.comBlogger330125tag:blogger.com,1999:blog-681679848185864075.post-84431156922943476232017-04-26T08:48:00.004-07:002017-04-26T08:48:38.432-07:00<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4XBc9Zn-ExZ5jjw-Uo91FazdRgm7Y1O-AKROD5RGLk-9PoxSB1t5fm0AmTDfywRDH8CKXK22UuDWtjt-018sRKaTg9R6tGwzZJOudy_Nz1gavBBIsUf9Dv-I5AkHeLOv6nsFjQmeS58M/s1600/Logo+Reunion.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="327" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4XBc9Zn-ExZ5jjw-Uo91FazdRgm7Y1O-AKROD5RGLk-9PoxSB1t5fm0AmTDfywRDH8CKXK22UuDWtjt-018sRKaTg9R6tGwzZJOudy_Nz1gavBBIsUf9Dv-I5AkHeLOv6nsFjQmeS58M/s400/Logo+Reunion.jpg" width="400" /></a></div>
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<span style="color: #660000;"><strong>Iº REUNION DE PALEOVERTEBRADOS DE LA CUENCA NEUQUINA.</strong></span> <br />
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<span style="color: #660000;">2 y 3 de Noviembre del 2017. Rincón de los Sauces, Neuquén.</span></div>
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<br />La localidad de <strong><span style="color: #660000;">Rincón de los Sauces</span></strong>, será cede de la primer reunión científica, donde se darán cita especialistas que trabajan en paleontología de vertebrados en la <span style="color: #660000;">Cuenca Neuquina</span>. En los últimos años se han incrementado notablemente las investigaciones en paleontología de vertebrados de la cuenca neuquina. Estos estudios se desarrollan en diversas temáticas qu<span class="text_exposed_show">e incluyen la osteología y <span style="color: #660000;">sistemática de distintos grupos taxonómicos, icnología, histología, paleoneurología y aspectos reproductivos,</span> entre otros. Desde la organización, se cree que un evento científico que reúna estas características resultará una instancia interesante para compartir avances e intercambiar ideas respecto al conocimiento actualizado de los <span style="color: #660000;">paleovertebrados de la Cuenca Neuquina.</span> </span></div>
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Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-16011065453215757002017-04-26T08:44:00.001-07:002017-04-26T08:44:17.246-07:00Estudiando el primer ornitópodo del MAU<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhmyXSo38a_30n_x8rIBMtd_SFAdGm5V9h1dkhcBp41T0XLmj2L2xD0Jl-YyaF9OmOAM3NVAirD-bEeLC22QKMgDNt1owRqo6mZzL88GJn-JAf-QgudDmYn5rXX-fM0wRXKbSzGTy7DiA/s1600/18010262_699585950248655_9000289871707706968_n.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhmyXSo38a_30n_x8rIBMtd_SFAdGm5V9h1dkhcBp41T0XLmj2L2xD0Jl-YyaF9OmOAM3NVAirD-bEeLC22QKMgDNt1owRqo6mZzL88GJn-JAf-QgudDmYn5rXX-fM0wRXKbSzGTy7DiA/s400/18010262_699585950248655_9000289871707706968_n.jpg" width="400" /></a></div>
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<strong><span style="color: #660000;">Se inicia el estudio del primer ejemplar de dinosaurio ornitópodo del <em>Museo Municipal Argentino Urquiza, </em>Rincón de los Sauces, Neuquén, Argentina</span></strong></div>
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Durante estos días, el <strong><span style="color: #660000;">MAU</span></strong> contó con la visita de la <strong><span style="color: #660000;">Dra. Penélope Cruzado-Caballero</span></strong>, paleontóloga perteneciente al <span style="color: #660000;"><strong>Grupo Aragosaurus (Zaragoza, España) y Conicet (Argentina),</strong></span> quién ha sido invitada especialmente a participar del estudio del primer ejemplar de dinosaurio ornitópodo hallado en la zona. Justamente la <strong><span style="color: #660000;">Dra. Cruzado-Caballero</span></strong> se especializa en este grupo de dinosaurios y es quien encabeza e<span class="text_exposed_show">l estudio de este y otros materiales hallados en el área de <strong><em><span style="color: #660000;">Cerro Overo</span></em></strong> por el equipo del <strong><span style="color: #660000;">MAU,</span></strong> dirigido por el <strong><span style="color: #660000;">Prof. Leonardo Filippi</span></strong>. Este dinosaurio, hallado en el <strong><span style="color: #660000;">2016</span></strong> por <strong><span style="color: #660000;">Salvador Palomo</span></strong>, uno de los técnicos del Museo, esta compuesto por el miembro anterior derecho casi completo y el tórax junto con la base del cuello articulados y en excelente estado de preservación. En los próximos meses, se sumarán otros colegas al estudio de estos materiales, los cuales forman parte de un proyecto ambicioso que tiene como objetivo el estudio de la fauna de vertebrados cretácicos del área <em><strong><span style="color: #660000;">Cerro Overo - La Invernada</span></strong></em>, el cual dió comienzo hace un poco más de tres años.</span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-29678123271523002032016-12-14T11:33:00.002-08:002016-12-14T11:33:56.317-08:00El MAU festeja sus 16 años con una réplica de Viavenator<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2D-Q4vS9vO8Eg7iKQLNLqXGyMbheEHQjrm7cFkHygaOfr7z2NTUVM0Wfk4gPhNIqoUibzShur5K7TAkwH-wvFkPAThX550BysKLC0XyhHC-689RtS-05T-9SgZVspdDQ_h6Zt5mm3_bE/s1600/Via.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="236" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2D-Q4vS9vO8Eg7iKQLNLqXGyMbheEHQjrm7cFkHygaOfr7z2NTUVM0Wfk4gPhNIqoUibzShur5K7TAkwH-wvFkPAThX550BysKLC0XyhHC-689RtS-05T-9SgZVspdDQ_h6Zt5mm3_bE/s400/Via.jpg" width="400" /></a></div>
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El 20 de diciembre próximo, cuando la localidad de <strong><span style="color: #660000;">Rincón de los Sauces, Neuquén, Argentina</span></strong>, cumpla su <span style="color: #660000;"><strong>45º Aniversario,</strong></span> conjuntamente con el <em><span style="color: #660000;"><strong>16º Aniversario del Museo Argentino Urquiza</strong></span></em>, se hará la presentación oficial de la réplica del dinosaurio carnívoro <em><span style="color: #660000;"><strong>Viavenator exxoni</strong></span></em>, en el marco de la inauguración del edificio de la nueva <em><span style="color: #660000;">Casa de la Cultura del Bicentenario</span></em>. <br /> Para el Museo y su equipo, este es un momento sumamente trascendente, ya que es la presentación de la primera <span class="text_exposed_show">réplica del esqueleto completo de un dinosaurio recuperado de la zona. </span></div>
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<span class="text_exposed_show">Este evento ocurrirá en horas de la tarde, previo al acto protocolar donde serán parte el <strong><em><span style="color: #660000;">Intendente Marcelo Rucci</span></em></strong> junto con el <em><span style="color: #660000;"><strong>Gobernador Omar Gutierrez</strong></span></em>, además de otros funcionarios municipales y provinciales. A partir de las 19:00hs el dinosaurio quedará en la sala del nuevo edificio para que público pueda ingresar a conocerlo.</span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-9391919209207654302016-12-06T07:31:00.000-08:002016-12-06T07:32:36.427-08:00Concluye una nueva etapa en la recuperación del saurópodo de Cañadón Mistringa<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhLBUl02LYor8iAed-aj2r1BvdJMahIGA4eRPBmYjcvWQFTcna_zq8FdvwFuulioEoJa-WlwXe94ZE5krFg7wE-UV72nsYKgDHskNECBMk4WH8bbGuk3jT20Af3Fc9-U50Z93xdoYaIqCQ/s1600/15181135_616913828515868_3180767945641619975_n.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="225" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhLBUl02LYor8iAed-aj2r1BvdJMahIGA4eRPBmYjcvWQFTcna_zq8FdvwFuulioEoJa-WlwXe94ZE5krFg7wE-UV72nsYKgDHskNECBMk4WH8bbGuk3jT20Af3Fc9-U50Z93xdoYaIqCQ/s400/15181135_616913828515868_3180767945641619975_n.jpg" width="400" /></a></div>
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Concluye la campaña de extracción de un nuevo <span style="color: #660000;">dinosaurio saurópodo</span> en el <strong><span style="color: #660000;">norte de Neuquén, Argenitna.</span></strong> Esta nueva etapa en la recuperación de este enorme ejemplar, hallado en el 2012, ha terminado satisfactoriamente. A pesar de que no se ha podido recuperar la totalidad de los materiales, se cumplió con el objetivo principal, el de retomar los trabajos de extracción en el sitio. Los numerosos materiales detectados en el último día de trabajo, plantean la necesidad de continuar las actividades en el 2017. Sólo queda dar comienzo al lento trabajo de preparación en el laboratorio del <strong><span style="color: #660000;">Museo Municipal Argentino Urquiza, Rincón de los Sauces</span></strong>, donde ya reposan los nuevos restos.</div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-86473114951936960932016-12-06T07:00:00.000-08:002016-12-06T07:00:04.081-08:00La réplica de Viavenator aguarda su presentación<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEix2LQMagCIKomlsrc0aPa1-shBe5tGBn1puPPm903BbBMiu3smSuq_vQLEipZz76BZTvtZrp9XZlvo_09RyL4uY0SrtvkmM1SNwij_k9FkQF8klvOeOqfEwD0cfocSybath8G0J9bu6-g/s1600/Via.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEix2LQMagCIKomlsrc0aPa1-shBe5tGBn1puPPm903BbBMiu3smSuq_vQLEipZz76BZTvtZrp9XZlvo_09RyL4uY0SrtvkmM1SNwij_k9FkQF8klvOeOqfEwD0cfocSybath8G0J9bu6-g/s400/Via.jpg" width="400" /></a></div>
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La réplica del primer dinosaurio carnívoro, <span style="color: #660000;"><em><strong>Viavenator exxoni</strong></em></span>, ya se encuentra depositada en las instalaciones del <strong><span style="color: #660000;">Museo Municipal Argentino Urquiza, Rincón de los </span><span style="color: #660000;">Sauces</span></strong><span style="color: #660000;">,<strong> Neuquén</strong></span>, luego de su largo viaje desde la provincia de Buenos, Aires. Se trata de una réplica a tamaño natural del esqueleto de este nuevo abelisaurio, el cual fue dado a conocer a principios de este año. Para el <span style="color: #660000;"><strong>MAU</strong>,</span> es sumamente importante, ya que será la primera réplica de un dinosaurio de la colección que será montada en las instalaciones del Museo. Todo está previsto que la presentación oficial se lleve adelante el próximo <span style="color: #660000;">20 de diciembre,</span> día donde se realizan no solo los festejos de aniversario de la localidad de <span style="color: #660000;">Rincón de los Sauces</span>, sino que además, el <span style="color: #660000;">Museo</span> cumple sus <span style="color: #660000;">16 años de vida</span>. Una vez realizado esto, los visitantes podrán concurrir al mismo para apreciar a esta magnífica nueva pieza de la exhibición.</div>
<br />Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-80483903293374895232016-11-04T12:46:00.002-07:002016-11-04T12:46:20.810-07:00Un Peirosauridae (Mesoeucrocodylia) de la Formación Bajo de la Carpa (Santoniano, Cretácico Superior), en la localidad de Cerro Overo, Patagonia Norte.<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9rervBzhPFF_UqSB9p9nDrc2-BAAvq4MZS5WMjmZe08rx3J6oWM98XwUFMYBO1r108lM1Et2UuVhgomQOUcqmOi2kBHYgNSEwEXEtuUaWihJJOFupAzHGGfsmTveOlZrPocUgCe2std8/s1600/P1250754.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9rervBzhPFF_UqSB9p9nDrc2-BAAvq4MZS5WMjmZe08rx3J6oWM98XwUFMYBO1r108lM1Et2UuVhgomQOUcqmOi2kBHYgNSEwEXEtuUaWihJJOFupAzHGGfsmTveOlZrPocUgCe2std8/s400/P1250754.JPG" width="400" /></a></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12pt; mso-bidi-font-weight: bold; mso-fareast-font-family: "Times New Roman";">Filippi, L., Barrios, F. y Arcucci, A.</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12pt;"><span style="color: #660000;">La Formación
Bajo de la Carpa (Santoniano) de Norpatagonia</span> es una unidad muy fosilífera, que
ha brindado restos de peces, quelonios, serpientes, dinosaurios saurópodos,
terópodos avianos y no-avianos, y principalmente cocodrilos. En la localidad de
Cerro Overo, al sudoeste de Rincón de los Sauces, provincia del Neuquén, hasta
el momento esta unidad solo brindó restos de Sauropoda <strong><span style="color: #660000;">(<i style="mso-bidi-font-style: normal;">Overosaurus</i> <i style="mso-bidi-font-style: normal;">paradasorum</i>
Coria <i style="mso-bidi-font-style: normal;">et al</i>., 2013).</span></strong> En esta
contribución se da a conocer el primer registro de un Crocodyliforme Mesoeucrocodylia
proveniente de dicha localidad. El espécimen corresponde a la
mitad anterior de ambas ramas mandibulares articuladas, integradas cada una por
los dentarios con algunos dientes preservados, y los espleniales. En base a
comparaciones encontramos similitudes morfológicas con <span style="color: #660000;">Peirosauridae:</span> por la
presencia de dientes zifodontes, sínfisis esplenial y foramen intermandibular oral
próximo a la región sinfiseal, particularmente de mandíbula <a href="https://www.blogger.com/null" name="_GoBack"></a>elongada
antero-posteriormente, de forma espatulada en su extremo más anterior, comprimida
dorso-ventralmente, y con contacto dentario-esplenial en la región sinfiseal en
forma de cuña y extendido anteriormente. La morfología recuerda a <i style="mso-bidi-font-style: normal;"><span style="color: #660000;"><strong>Pepesuchus</strong></span> </i><span style="color: #660000;">Campos <i style="mso-bidi-font-style: normal;">et al</i>., 2011</span>, y principalmente a <span style="color: #660000;"><i style="mso-bidi-font-style: normal;"><strong>Itasuchus</strong> </i>Price, 1955</span>, que los
diferencia de otros peirosáuridos (e.g.<strong><span style="color: #660000;"> </span></strong><i style="mso-bidi-font-style: normal;"><strong><span style="color: #660000;">Gasparinisuchus</span></strong>
</i><span style="color: #660000;">Martinelli <i style="mso-bidi-font-style: normal;">et a</i>l., 2012 y <i style="mso-bidi-font-style: normal;"><strong>Montealtosuchus</strong> </i>Carvalho <i style="mso-bidi-font-style: normal;">et al</i>., 2007</span>), que presentan mandíbula
más robusta con una región sinfiseal tan ancha como larga, y superficie dorsal
cóncava. Sin embargo, la ausencia de alvéolos confluentes en el material de
<span style="color: #660000;"><strong>Cerro Overo</strong></span> <span style="color: #660000;">sugiere que se trata de un nuevo taxón</span>, lo que aumentaría la
diversidad de Peiro<span style="color: #660000;">sauridae en el Cretácico de Patagonia.</span></span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12pt;">11º Congreso de
la Asociación Paleontológica Argentina, Gral. Roca, Río Negro, Argentina, 2016.<o:p></o:p></span></div>
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<br />Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-59733497859687652052016-11-04T12:35:00.002-07:002016-11-04T12:35:37.975-07:00A new titanosaur specimen with highly derived skull from the Santonian of northern Patagonia, Argentina<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYPqBYGvyCzZUhiSDLNHlM7DhiP3jgaDVn8jOCo24rjV3LLH0XBK81a4MWBmm2TYbZgOYjNpn_oyLQA-hCfuZrHw-BO4r1XG_5MyyfymiiBhwKnCM8Ri7XgBNyO2W2nZJZW8VHqTMGgvg/s1600/SAM_6891.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="271" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYPqBYGvyCzZUhiSDLNHlM7DhiP3jgaDVn8jOCo24rjV3LLH0XBK81a4MWBmm2TYbZgOYjNpn_oyLQA-hCfuZrHw-BO4r1XG_5MyyfymiiBhwKnCM8Ri7XgBNyO2W2nZJZW8VHqTMGgvg/s400/SAM_6891.JPG" width="400" /></a></div>
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<em><span style="font-family: Times New Roman;">Filippi, L., Juárez Valieri, R., Gallina, P., Méndez, A., Gianechini, F.</span><span style="font-family: Times New Roman; font-size: xx-small;"><span style="font-family: Times New Roman; font-size: xx-small;"> </span></span></em><span style="font-family: Times New Roman;"><em>y Garrido, A.</em> </span></div>
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<span lang="ES-AR" style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%; mso-fareast-font-family: "Times New Roman";">Paleontological fieldworks carried out
on upper section of the <span style="color: #660000;">Bajo de la Carpa Formation (Santonian, Upper Cretaceous)
at La Invernada area, near<span style="mso-spacerun: yes;"> </span>Rincón de los
Sauces city (northeast Neuquén Province),</span> result in the discovery of several
specimens of derived titanosaurs, <a href="https://www.blogger.com/null" name="_GoBack"></a>belonging to multiple
taxa. One of them, consists of an articulated modest-sized
individual with a <span style="color: #660000;">nearly complete skull, the axial sequence from the atlas to
the last sacral vertebrae with their respective ribs, and both ilia</span>.This
sequence is composed by thirteen cervical, ten dorsal and six sacral vertebrae.
The skull displays a spatulate snout morphology, with a straight anterior
margin, similar to the morphology previously recognized in other titanosaurs
such as <strong><span style="color: #660000;"><i style="mso-bidi-font-style: normal;">Antarctosaurus</i>, <i style="mso-bidi-font-style: normal;">Bonitasaura</i></span></strong> and <i style="mso-bidi-font-style: normal;"><strong><span style="color: #660000;">Brasilotitan</span></strong></i>. The neurocranial morphology is highly derived
compared with other titanosaur taxa with well-known skulls such as <strong><span style="color: #660000;"><i style="mso-bidi-font-style: normal;">Sarmientosaurus</i>, <i style="mso-bidi-font-style: normal;">Nemegtosaurus</i>, <i style="mso-bidi-font-style: normal;">Tapuiasaurus</i></span></strong>
and<i style="mso-bidi-font-style: normal;"> <strong><span style="color: #660000;">Rapetosaurus</span></strong></i>, with displaced
frontals located behind the orbits, resulting in an opposite position to the
anterior margin of the snout. The occipital condyle is not preserved, but the
location of the neurocranial elements and the atlas-axis complex <span style="color: #660000;">(found in anatomical
position)</span> allow to infer a nearly perpendicular position for the tooth row
respect to the cervical sequence. This particular condition, confirmed for
first time in a derived titanosaur, is morphologically convergent with derived
rebbachisaurids such as <strong><span style="color: #660000;"><i style="mso-bidi-font-style: normal;">Nigersaurus</i>.</span></strong>
Besides, their respective biochrons are in agreement with the paleoecological
niche replacement of the rebbachisaurids by the <span style="color: #660000;">spatulate snouted titanosaurs</span>
in <span style="color: #660000;">South America,</span> as previously suggested in the post <span style="color: #660000;">Turonian</span> faunal turnover.
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<span lang="ES-AR" style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%; mso-fareast-font-family: "Times New Roman";">11º Congreso de la Asociación Argentina de Paleontología, Gral. Roca, Río Negro, Argentina 2016.</span></div>
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<br />Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-70725586985673451852016-11-04T12:22:00.000-07:002016-11-04T12:22:30.226-07:00El MAU a punto de iniciar una nueva campaña en los alrededores de Rincón de los Sauces<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsUYLQBy-LjxFuFoCGZXBSjMw8MmbqRk3L7Me1BsLpOC6PXb33SOuqcip-gVCUwTfWKuGjfmZ0Krm_jS8ALGQafkm3UL5ly75CtQMIpv030nrfXiT5Bdbr4LZxEGz0fdSVfpI8nN379Qo/s1600/14370187_585457218328196_6407029177055579558_n.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsUYLQBy-LjxFuFoCGZXBSjMw8MmbqRk3L7Me1BsLpOC6PXb33SOuqcip-gVCUwTfWKuGjfmZ0Krm_jS8ALGQafkm3UL5ly75CtQMIpv030nrfXiT5Bdbr4LZxEGz0fdSVfpI8nN379Qo/s400/14370187_585457218328196_6407029177055579558_n.jpg" width="400" /></a></div>
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<span style="color: black;">El equipo del <span style="color: #660000;"><strong>Museo Argentino Urquiza</strong></span> <span style="color: #660000;">(Rincón de los Sauces, Neuquén, Argentina)</span> realizó trabajos preliminares en el sitio de <strong><em><span style="color: #660000;">Cañadón Mistringa</span></em>,</strong> para despejar varias toneladas de roca que cubrían un ejemplar de saurópodo parcialmente recuperado. Esta tarea, llevada adelante gracias al apoyo logístico del sector de <span style="color: #660000;"><em>Obras Públicas de la Municipalidad de Rincón de los Sauces</em></span>, permitirá agilizar notablemente los trabajos de campo. Llega la época de campañas y la posibilidad de extraer definitivamente todo el material restante de este enorme dinosaurio.</span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-82052067782288875172016-09-02T07:59:00.001-07:002016-09-02T08:00:36.313-07:00A Jurassic pterosaur from Patagonia<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUPIlbsKwGS47tDsMe9m9ufFoyR9aqzynzSqXu45603e8vVJJZ-6CtRKYIEFQfUhBuB1yFxAErRzYhBwIUH-py7AexaHlW6h4L2ilraS_LJMbozqqbaRrXTVaSEA_tLGQD82xXo-Rk2bA/s1600/fig-1-1x.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUPIlbsKwGS47tDsMe9m9ufFoyR9aqzynzSqXu45603e8vVJJZ-6CtRKYIEFQfUhBuB1yFxAErRzYhBwIUH-py7AexaHlW6h4L2ilraS_LJMbozqqbaRrXTVaSEA_tLGQD82xXo-Rk2bA/s400/fig-1-1x.jpg" width="327" /></a></div>
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Pterosaurs are an extinct group of highly modified flying reptiles that thrived during the Mesozoic. This group has unique and remarkable skeletal adaptations to powered flight, including pneumatic bones and an elongate digit IV supporting a wing-membrane. Two major body plans have traditionally been recognized: the primitive, primarily long-tailed paraphyletic <span style="color: #660000;"><strong>“rhamphorhynchoids”</strong></span> (preferably currently recognized as non-pterodactyloids) and the derived short-tailed pterodactyloids. These two groups differ considerably in their general anatomy and also exhibit a remarkably different neuroanatomy and inferred head posture, which has been linked to different lifestyles and behaviours and improved flying capabilities in these reptiles. Pterosaur neuroanatomy, is known from just a few three-dimensionally preserved braincases of <span style="color: #660000;"><strong>non-pterodactyloids (as Rhamphorhynchidae)</strong></span> and pterodactyloids, between which there is a large morphological gap. Here we report on a new Jurassic pterosaur from Argentina, <strong><span style="color: #660000;"><i>Allkaruen koi</i> gen. et sp. nov.,</span></strong> remains of which include a superbly preserved, uncrushed braincase that sheds light on the origins of the highly derived neuroanatomy of pterodactyloids and their close relatives. A µCT ray-generated virtual endocast shows that the new pterosaur exhibits a mosaic of plesiomorphic and derived traits of the inner ear and neuroanatomy that fills an important gap between those of non-monofenestratan breviquartossans <span style="color: #660000;"><strong>(Rhamphorhynchidae)</strong></span> and derived pterodactyloids. These results suggest that, while modularity may play an important role at one anatomical level, at a finer level the evolution of structures within a module may follow a mosaic pattern.</div>
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<span class="self-citation-authors">Codorniú L, Paulina Carabajal A, Pol D, Unwin D, Rauhut OWM.</span> (<span class="self-citation-year">2016</span>) <span class="self-citation-title">A Jurassic pterosaur from Patagonia and the origin of the pterodactyloid neurocranium</span>. <span itemprop="isPartOf" itemscope="itemscope" itemtype="http://schema.org/PublicationVolume"><span class="self-citation-journal" itemprop="isPartOf" itemscope="itemscope" itemtype="http://schema.org/Periodical"><span itemprop="name">PeerJ</span></span> <span class="self-citation-volume" itemprop="volumeNumber">4</span></span>:<span class="self-citation-elocation" itemprop="pageStart">e2311</span> <a href="https://doi.org/10.7717/peerj.2311" itemprop="url">https://doi.org/10.7717/peerj.2311</a> </div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-16798806106029003982016-09-02T07:50:00.000-07:002016-09-02T07:50:05.844-07:00Nuevos hallazgos en La Invernada<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiM7oagNdUdabLFZOWLQJ5Ohh6pEmDrgqc4wol_ThnB62trHQw8Lc1w33gS9wszMeNM8DhjrqeZnalybDEMGNsK82lBgpphdqCZwGsLrhc6g63ZLAb8hNqN__oGcdVYTlDHjSprP7nj9_k/s1600/14192664_574357042771547_3259912748165560150_n.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiM7oagNdUdabLFZOWLQJ5Ohh6pEmDrgqc4wol_ThnB62trHQw8Lc1w33gS9wszMeNM8DhjrqeZnalybDEMGNsK82lBgpphdqCZwGsLrhc6g63ZLAb8hNqN__oGcdVYTlDHjSprP7nj9_k/s400/14192664_574357042771547_3259912748165560150_n.jpg" width="400" /></a></div>
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El pasado fin de semana, el <span style="color: #660000;"><strong>MAU, Museo Municipal Argentino Urquiza, Rincón de los Sauces, Neuquén, Argentina, </strong></span> realizó la evaluación de una denuncia de hallazgo de restos fósiles en el área <em>La Invernada</em>. Después de transitar por un camino de muy dificil acceso, se pudo dar con el lugar exacto de donde provenian los restos recuperados. Los materiales entregados al Museo correspondían a tres de los cinco huesos metacarpianos de una pata delantera de un dinosaurio saurópodo. La evaluación realizada en el lugar permitió determinar que el resto de los huesos faltantes aún estaban in situ, los cuales se encontraban muy bien preservados y articulados con el resto de dicha pata. En futuras salidas, el resto de los huesos serán recuperados y se evaluará si puede que el resto del dinosaurio se encuentre bajo la roca.</div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-85328424149135657262016-07-22T09:27:00.003-07:002016-07-22T09:27:36.553-07:00New Megaraptoran Dinosaur (Dinosauria, Theropoda, Megaraptoridae) from Late Cretaceous of Patagonia<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgdeFbzr4YvKson4t2VO2lf53odT1nCdvUdVltueLJHLWm5-HG1_lxuInaBUxCa5JF6JRQyHp2I7CQw4UZkkUZKsjQWpq-RdWXu7ZpRmf9rCNhX4mBqbq1zDf25CwjVSa8rgzQSIU_Z5_g/s1600/Murus.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="218" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgdeFbzr4YvKson4t2VO2lf53odT1nCdvUdVltueLJHLWm5-HG1_lxuInaBUxCa5JF6JRQyHp2I7CQw4UZkkUZKsjQWpq-RdWXu7ZpRmf9rCNhX4mBqbq1zDf25CwjVSa8rgzQSIU_Z5_g/s640/Murus.jpg" width="640" /></a></div>
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<i style="mso-bidi-font-style: normal;"><span style="font-family: "Arial","sans-serif"; font-size: 12pt; line-height: 115%;">Rodolfo
A. Coria and Philip J. Currie<o:p></o:p></span></i></div>
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<span style="font-family: "Arial","sans-serif"; font-size: 12pt; line-height: 115%;">A skeleton discovered in the
<strong><span style="color: #660000;">Upper Cretaceous Sierra Barrosa Formation (Turonian-Coniacian) of Neuquén
Province, Argentina</span></strong> represents a new species of theropod dinosaur related to
the long snouted, highly <span style="color: #660000;">pneumatized Megaraptoridae</span>. The holotype specimen of <strong><em><span style="color: #660000;">Murusraptor
barrosaensis</span></em></strong><span style="color: #660000;"> n.gen et n.sp.</span> includes much of the skull, axial skeleton,
pelvis and tibia. <strong><em><span style="color: #660000;">Murusraptor</span></em></strong> is unique in having several diagnostic features
that include anterodorsal process of lacrimal longer than height of preorbital
process, and a thick, shelf-like thickening on the lateral surface of surangular
ventral to the groove between the anterior surangular foramen and the insert
for the uppermost intramandibular process of the dentary. Other characteristic
features of <strong><em><span style="color: #660000;">Murusraptor barrosaensis</span></em></strong> <span style="color: #660000;">n.gen. et n. sp.</span> include a large
mandibular fenestra, distal ends of caudal neural spines laterally thickened into
lateral knob-like processes, short ischia distally flattened and slightly
expanded dorsoventrally. <strong><em><span style="color: #660000;">Murusraptor</span></em></strong> belongs to a Patagonian radiation of
megaraptorids together with <strong><em><span style="color: #660000;">Aerosteon, Megaraptor</span></em></strong> and <strong><em><span style="color: #660000;">Orkoraptor.</span></em></strong> In spite
being immature, it is a larger but more gracile animal than existing specimens
of <span style="color: #660000;"><em><strong>Megaraptor</strong></em></span>, and is comparable in size with <strong><em><span style="color: #660000;">Aerosteon</span></em></strong> and <strong><em><span style="color: #660000;">Orkoraptor.</span></em></strong> The
controversial phylogeny of the Megaraptoridae as members of the Allosauroidea
or a clade of Coelurosauria is considered analyzing two alternative data sets.<o:p></o:p></span></div>
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<span style="font-family: "Arial","sans-serif"; font-size: 12pt; line-height: 115%;">Coria RA, Currie PJ (2016) A
New Megaraptoran Dinosaur (Dinosauria, Theropoda, Megaraptoridae) from the Late
Cretaceous of Patagonia. PLoS ONE 11(7): e0157973. doi:10.1371/ journal.pone.0157973<o:p></o:p></span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-27389720080090130022016-07-22T09:18:00.000-07:002016-07-22T09:18:05.796-07:00An Unusual New Theropod with a Didactyl from Patagonia Argentina<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi38-p4Jt1NWgjB5b5T7GbuxMrwzKZC93LbLVMdJ9VEzs__NmJm-qt_hoViq88XjZ-3Ff6t3-JbKf6WoBt4YKc5PTyiVOLpraGj9iTD3ndGOnDWIvLvz31Y0mLvB5dItpQnTMJ9YU4zr6g/s1600/gualicho.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="219" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi38-p4Jt1NWgjB5b5T7GbuxMrwzKZC93LbLVMdJ9VEzs__NmJm-qt_hoViq88XjZ-3Ff6t3-JbKf6WoBt4YKc5PTyiVOLpraGj9iTD3ndGOnDWIvLvz31Y0mLvB5dItpQnTMJ9YU4zr6g/s640/gualicho.jpg" width="640" /></a></div>
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<i style="mso-bidi-font-style: normal;"><span style="font-family: "Arial","sans-serif"; font-size: 12pt; line-height: 115%;">Sebastián
Apesteguía, Nathan D. Smith, Rubén Juárez Valieri, Peter J. Makovicky<o:p></o:p></span></i></div>
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<span style="font-family: "Arial","sans-serif"; font-size: 12pt; line-height: 115%;">Late Cretaceous terrestrial
strata of the <span style="color: #660000;"><strong>Neuquén Basin, northern Patagonia, Argentina</strong></span> have yielded a rich
fauna of dinosaurs and other vertebrates. The diversity of saurischian dinosaurs
is particularly high, especially in the late <span style="color: #660000;">Cenomanian-early Turonian Huincul
Formation</span>, which has yielded specimens of <span style="color: #660000;">rebacchisaurid and titanosaurian
sauropods</span>, and<span style="color: #660000;"> abelisaurid and carcharodontosaurid theropods</span>. Continued
sampling is adding to the known vertebrate diversity of this unit.<o:p></o:p></span></div>
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<span style="font-family: "Arial","sans-serif"; font-size: 12pt; line-height: 115%;">A new, partially articulated
mid-sized theropod was found in rocks from the <span style="color: #660000;"><strong>Huincul Formation</strong></span>. It exhibits a
unique combination of traits that distinguish it from other known theropods justifying
erection of a new taxon, <em><strong><span style="color: #660000;">Gualicho shinyae</span></strong></em> <span style="color: #660000;">gen. et sp. nov.</span> <em><strong><span style="color: #660000;">Gualicho</span></strong></em> possesses a
didactyl manus with the third digit reduced to a metacarpal splint <span style="color: #660000;">reminiscent
of tyrannosaurids</span>, but both phylogenetic and multivariate analyses indicate
that didactyly is convergent in these groups. Derived characters of the
scapula, femur, and fibula supports the new theropod as the sister taxon of the
nearly coeval African theropod <em><strong><span style="color: #660000;">Deltadromeus</span></strong></em> and as a neovenatorid carcharodontosaurian.
A number of these features are independently present in ceratosaurs, and
<strong><em><span style="color: #660000;">Gualicho </span></em></strong>exhibits an unusual <span style="color: #660000;">mosaic of ceratosaurian and tetanuran
synapomorphies distributed throughout the skeleton.<o:p></o:p></span></span></div>
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<span style="font-family: "Arial","sans-serif"; font-size: 12pt; line-height: 115%;">Apesteguía S, Smith ND,
Juárez Valieri R, Makovicky PJ (2016) An Unusual New Theropod with a Didactyl
Manus from the Upper Cretaceous of Patagonia, Argentina. PLoS ONE 11(7):
e0157793. doi:10.1371/journal.pone.0157793<o:p></o:p></span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-20054379231582026162016-06-30T08:51:00.001-07:002016-06-30T08:51:16.373-07:00Hallan el primer dinosaurio ornitópodo del norte neuquino<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhB9CN2HmZiURt3WPaDqpA193ZrkSFvcWam9QfBAirwAO0X4GK8O4U8QPXJe_4cGw0NmiKScaf7Eqa3OyyWu6tZjMeFJe8wvupOgwBFr1Hn-WvBN6L9MoDvGg7-SewD8rBW851UD6WJKW4/s1600/SAM_8715.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="298" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhB9CN2HmZiURt3WPaDqpA193ZrkSFvcWam9QfBAirwAO0X4GK8O4U8QPXJe_4cGw0NmiKScaf7Eqa3OyyWu6tZjMeFJe8wvupOgwBFr1Hn-WvBN6L9MoDvGg7-SewD8rBW851UD6WJKW4/s400/SAM_8715.JPG" width="400" /></a></div>
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Durante la semana pasada el equipo del <span style="color: #660000;"><strong>MAU</strong>, <em>Museo Municipal Argentino Urquiza</em> de Rincón de los Sauces, Neuquén</span>, realizó el inesperado hallazgo de los restos de un ejemplar de <span style="color: #660000;">dinosaurio ornitópodo, </span>el cual se encuentra en muy buen estado de preservación. Las tareas de campo permitieron recuperar los restos integrados por la porción anterior del cuerpo del animal, integrada por las <span style="color: #660000;">últimas cervicales y las primeras siete dorsales, articuladas con sus correspondientes costillas y ambas escapulo-coracoides. Además, excepcionalmente se halló el miembro anterior derecho completo y articulado al cuerpo.</span> Si bien se habían hallado restos en la zona de este grupo de dinosaurios ornitisquios, este es el primer ejemplar de relevancia hallado en la zona norte de la Provincia de Neuquén, por lo que permite engrosar el conocimiento de la fauna de dinosaurios de esta región. Actualmente el material esta siendo preparado en el laboratorio del Museo.</div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-11344798928383389102016-05-26T08:32:00.003-07:002016-05-26T08:34:08.711-07:00Nuevo registro de ornitópodos provenientes de la Formación Plottier, Rincón de los Sauces, Neuquén<div style="text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjBTADo2JDd8k-Ppx2PSvtmp8-mzATKg4qZPSSaLxuog_JPUEGJF1INzMH_W_5rUrHqEKaDjrflUMyFIcKjInOBa81l3hqMoCAMrgU7pn53J3vpD1tvrb1DPqWAg3en_dPVfQWSs8KZAE0/s1600/ajshjash.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="237" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjBTADo2JDd8k-Ppx2PSvtmp8-mzATKg4qZPSSaLxuog_JPUEGJF1INzMH_W_5rUrHqEKaDjrflUMyFIcKjInOBa81l3hqMoCAMrgU7pn53J3vpD1tvrb1DPqWAg3en_dPVfQWSs8KZAE0/s400/ajshjash.jpg" width="400" /></a></div>
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<i style="mso-bidi-font-style: normal;"><span style="font-family: "times new roman" , "serif"; font-size: 12pt; line-height: 115%;">Penélope
Cruzado-Caballeroa, Leonardo S. Filippi, Ariel H. Méndez, Alberto C. Garrido
and Rubén D. Juárez Valieri<o:p></o:p></span></i></div>
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<span style="font-family: "times new roman" , "serif"; font-size: 12pt; line-height: 115%;">Ornithopods are the
least known dinosaurs within the Upper Cretaceous record of Argentina. For this
rea-son every new record is very important to know their evolution in South
America. Here, we describe a new remain of an indeterminate ornithopod recovered
in the <span style="color: #660000;"><strong><i style="mso-bidi-font-style: normal;">Petrobrasaurus</i> quarry</strong></span> of the
<strong><span style="color: #660000;">Puesto Hernández area, northeastern Neuquén province (Argentina),</span></strong> <strong><span style="color: #660000;">late
Coniacian–early Santonian in age.</span></strong> MAU-Pv-PH-458 is the northernmost bone record
of an ornithopod in Argentina. This is a fragmentary neural arch fromthe middle
section of the dorsal series of similar size to <i style="mso-bidi-font-style: normal;"><span style="color: #660000;">Macrogryphosaurus gondwanicus</span></i>. <strong><span style="color: #660000;">MAU-Pv-PH-458</span></strong> has typical ornithopod
characters such as a lateromedial narrow neural spine and transverse
processes dorsoposteriorly to posteriorly oriented. It shares with <i style="mso-bidi-font-style: normal;"><span style="color: #660000;">Macrogryphosaurus</span></i> the presence of a deep
cannel between the </span>bases of the postzygapophysis, which is a continuation of
the channel that separates the postzygapophyses in posterior view. <strong><span style="color: #660000;">MAU-Pv-PH-458</span></strong>
increases the ornithopod record from the Plottier Formation.<o:p></o:p><br />
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "times new roman" , "serif"; font-size: 12pt; line-height: 115%;">Cruzado-Caballero, P.,
et al., New record of ornithopod dinosaur from the Plottier Formation (Upper
Cretaceous), Patagonia, Argentina. Annales de Paléontologie (2016), http://dx.doi.org/10.1016/j.annpal.2016.02.003<o:p></o:p></span></div>
</div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-65369509683320448012016-05-18T15:32:00.003-07:002016-05-18T15:32:54.352-07:00New rebbachisaurid cranial remains (Sauropoda, Diplodocoidea) from the Cretaceous of Patagonia<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjNn9OtafruanTklMHBv37ryZQKKkh0ohMNTyXgRpDYs4JmaNnPUgyu0o77zQgow2SjPqlY6coO9J15kCBGAbitKgfy8fZ8fmuRrLBOYKMZTIE_N0_WM4bGM8DdQzUfYWJE-IkjX0InLSQ/s1600/hasjahsjhaskj.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="291" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjNn9OtafruanTklMHBv37ryZQKKkh0ohMNTyXgRpDYs4JmaNnPUgyu0o77zQgow2SjPqlY6coO9J15kCBGAbitKgfy8fZ8fmuRrLBOYKMZTIE_N0_WM4bGM8DdQzUfYWJE-IkjX0InLSQ/s400/hasjahsjhaskj.jpg" width="400" /></a></div>
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<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<i style="mso-bidi-font-style: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Ariana
Paulina Carabajal, Juan I. Canale, and Alejandro Haluza<o:p></o:p></span></i></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Report a new
rebbachisaurid material recovered from the <strong><span style="color: #660000;">Candeleros Formation (Cenomanian) of
northwest Patagonia, Argentina</span></strong>. The cranial remains consist of a partial
braincase and a right quadrate. Fractures in the braincase exposed the
endocranial cavity, allowing the first study of the brain and inner ear
morphologies of a <span style="color: #660000;"><strong>South American rebbachisaurid</strong></span>. The braincase and cranial
endocast both exhibit traits similar to those observed in the Cretaceous
rebbachisaurs <em><strong><span style="color: #660000;">Nigersaurus </span></strong></em>from Africa and <span style="color: #660000;"><em><strong>Limaysaurus </strong></em></span>from Argentina, although
in terms of osteology, the South American taxa are highly similar. The endocast
is more similar to that of <span style="color: #660000;"><em><strong>Nigersaurus</strong></em></span> than to those of <strong><em><span style="color: #660000;">Diplodocus</span></em></strong> and
<strong><em><span style="color: #660000;">Camarasaurus,</span></em></strong> suggesting some probable rebbachisaurid features such as the
noteworthy presence of the flocculus. The overall morphology of the quadrate
shows similarities with <strong><em><span style="color: #660000;">Limaysaurus</span></em></strong> and <strong><em><span style="color: #660000;">Nigersaurus</span></em></strong>. However, differences such
as the broader posterior fossa and the shape and orientation of the head and
the pterygoid process indicate that the new specimen could represent a distinct
taxon.<o:p></o:p></span></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Ariana Paulina
Carabajal, Juan I. Canale & Alejandro Haluza (2016): New rebbachisaurid
cranial remains (Sauropoda, Diplodocoidea) from the Cretaceous of Patagonia, Argentina,
and the first endocranial description for a South American representative of
the clade, Journal of Vertebrate Paleontology, DOI:
10.1080/02724634.2016.1167067<o:p></o:p></span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-9104998587865553282016-05-03T08:25:00.000-07:002016-05-03T08:25:03.304-07:00The skull of the titanosaur Tapuiasaurus macedoi, from the Lower Cretaceous of Brazil<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi8eArT-OC8_ckdhA748V5f-9GoEw4O9g6LleK7VQ500C55qbZitwFgwMmxhZ91lxR-7M1ajDaOOUGxJro6T_-buCC8PF7ZDBevLN_aQjJMLp1Jha3_mAKusd4SNvgQa_P6sRdxuxPBcdQ/s1600/nuevo-1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="230" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi8eArT-OC8_ckdhA748V5f-9GoEw4O9g6LleK7VQ500C55qbZitwFgwMmxhZ91lxR-7M1ajDaOOUGxJro6T_-buCC8PF7ZDBevLN_aQjJMLp1Jha3_mAKusd4SNvgQa_P6sRdxuxPBcdQ/s400/nuevo-1.jpg" width="400" /></a></div>
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<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<i style="mso-bidi-font-style: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Jeffrey
A. Wilson, Diego Pol, Alberto B. Carvalho & Hussam Zaher<o:p></o:p></span></i></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Although Titanosauria
is the most diverse and late-surviving sauropod lineage, cranial elements are
known for just over <strong><span style="color: #660000;">24 of its 70+ genera</span></strong> – the vast majority of which are
fairly fragmentary and restricted to the Late Cretaceous. Only three complete
titanosaur skulls have been described to date; two of these are from the latest
Cretaceous <span style="color: #660000;">(<strong><em>Nemegtosaurus, Rapetosaurus</em></strong>),</span> and the third, <strong><em><span style="color: #660000;">Tapuiasaurus</span></em></strong>, is from
the <strong><span style="color: #660000;">Early Cretaceous (Aptian).</span></strong> In this contribution, we build on the initial
treatment of the taxon by providing a complete description of the cranial
elements that benefits from additional preparation and computed tomography
imaging. We identify six additional features diagnosing <strong><em><span style="color: #660000;">Tapuiasaurus macedoi,</span></em></strong>
including a jugal with an elongate lacrimal process forming much of the
posteroventral border of the antorbital fenestra, a lateral temporal fenestra
divided by a second squamosal–postorbital contact, and upper jaw teeth with
labial wear facets. We directed the new morphological data in T<strong><em><span style="color: #660000;">apuiasaurus </span></em></strong>as
well as other observations towards a re-analysis of its phylogenetic position
within Titanosauria. Our analysis yielded 34 most parsimonious trees, most of
which recovered <strong><em><span style="color: #660000;">Tapuiasaurus </span></em></strong>in a basal position adjacent to the Early
Cretaceous taxa <strong><em><span style="color: #660000;">Malawisaurus</span></em></strong> and <strong><em><span style="color: #660000;">Tangvayosaurus</span></em></strong>, but two trees recovered it
within Late Cretaceous nemegtosaurids. We explored the effects of missing data
and missing stratigraphic ranges on our results, concluding that <strong><span style="color: #660000;">(1)</span></strong> when
missing data levels are high, resolution of even small amounts of that missing
data can have dramatic effects on topology, <strong><span style="color: #660000;">(2)</span></strong> taxa that are mostly scored for
characters that cannot be scored in other taxa may be topologically unstable
and <strong><span style="color: #660000;">(3)</span></strong> there were several suboptimal trees that had greatly improved
stratigraphic fit with relatively little compromise in terms of tree length.<o:p></o:p></span></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Jeffrey A. Wilson,
Diego Pol, Alberto B. Carvalho<span style="mso-spacerun: yes;"> </span>and
Hussam Zaher (2016) The skull of the titanosaur Tapuiasaurus macedoi
(Dinosauria: Sauropoda), a basal titanosaur from the Lower Cretaceous of Brazil.
<i style="mso-bidi-font-style: normal;">Zoological Journal of the Linnean Society</i>
DOI: 10.1111/zoj.12420<o:p></o:p></span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-63857251101164614852016-04-28T12:05:00.000-07:002016-04-28T12:05:01.402-07:00A Basal Lithostrotian Titanosaur with a Complete Skull from Patagonia, Argentina<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiT0fwEkxA6MCf6iQobtPxwuXrdD67Hd8yJDki43KGD1YbKjIfQ9MrYQMIIZEx8bUs9WmdeyfBBcDr0PQzT32yGEHwKFZ3yZzzf9cLN7XNd7m9kzYXlojKPrr7NSB3GNTKHwKRZeI5Wsjs/s1600/asa.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="375" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiT0fwEkxA6MCf6iQobtPxwuXrdD67Hd8yJDki43KGD1YbKjIfQ9MrYQMIIZEx8bUs9WmdeyfBBcDr0PQzT32yGEHwKFZ3yZzzf9cLN7XNd7m9kzYXlojKPrr7NSB3GNTKHwKRZeI5Wsjs/s400/asa.jpg" width="400" /></a></div>
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<i style="mso-bidi-font-style: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12pt;">Rubén
D. F. Martínez, Matthew C. Lamanna, Fernando E. Novas, Ryan C. Ridgely, Gabriel
A. Casal, Javier E. Martínez, Javier R. Vita & Lawrence M. Witmer<o:p></o:p></span></i></div>
<br />
<div class="MsoNormal" style="line-height: normal; margin: 0cm 0cm 0pt; mso-layout-grid-align: none; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt;">We describe <strong><span style="color: #660000;"><em>Sarmientosaurus
musacchioi</em> gen. et sp. nov.,</span></strong> a titanosaurian sauropod dinosaur from the <strong><span style="color: #660000;">Upper
Cretaceous (Cenomanian - Turonian) Lower Member of the Bajo Barreal Formation</span></strong>
of southern <strong><span style="color: #660000;">Chubut Province in central Patagonia, Argentina.</span></strong> The holotypic and
only known specimen consists of an articulated, virtually complete skull and
part of the cranial and middle cervical series. <strong><em><span style="color: #660000;">Sarmientosaurus</span></em></strong> exhibits the
following distinctive features that we interpret as autapomorphies:<strong><span style="color: #660000;"> (1)</span></strong> maximum
diameter of orbit nearly 40% rostrocaudal length of cranium; <span style="color: #660000;"><strong>(2)</strong></span> complex
maxilla-lacrimal articulation, in which the lacrimal clasps the ascending ramus
of the maxilla; <strong><span style="color: #660000;">(3)</span></strong> medial edge of caudal sector of maxillary ascending ramus
bordering bony nasal aperture with low but distinct ridge; <strong><span style="color: #660000;">(4)</span></strong> ‘tongue-like’ ventral
process of quadratojugal that overlaps quadrate caudally; <strong><span style="color: #660000;">(5)</span></strong> separate foramina
for all three branches of the trigeminal nerve;<strong><span style="color: #660000;"> (6)</span></strong> absence of median venous
canal connecting infundibular region to ventral part of brainstem; <span style="color: #660000;"><strong>(7)</strong></span>
subvertical premaxillary, procumbent maxillary, and recumbent dentary teeth;<strong><span style="color: #660000;">
(8)</span></strong> cervical vertebrae with ‘strut-like’ centroprezygapophyseal laminae; <strong><span style="color: #660000;">(9)</span></strong>
extremely elongate and slender ossified tendon positioned ventrolateral to
cervical vertebrae and ribs. The cranial endocast of <strong><em><span style="color: #660000;">Sarmientosaurus</span></em></strong> preserves some
of the most complete information obtained to date regarding the brain and
sensory systems of sauropods. Phylogenetic analysis recovers the new taxon as a
basal member of Lithostrotia, as the most plesiomorphic titanosaurian to be
preserved with a complete skull. <span style="color: #660000;"><strong><em>Sarmientosaurus </em></strong></span>provides a wealth of new
cranial evidence that reaffirms the close relationship of titanosaurs to
Brachiosauridae. Moreover, the presence of the relatively derived lithostrotian
<span style="color: #660000;"><strong><em>Tapuiasaurus</em></strong></span> in Aptian deposits indicates that the new Patagonian genus
represents a ‘ghost lineage’ with a comparatively plesiomorphic craniodental
form, the evolutionary history of which is missing for at least 13 million
years of the Cretaceous. The skull anatomy of <strong><em><span style="color: #660000;">Sarmientosaurus</span></em></strong> suggests that
multiple titanosaurian species with dissimilar cranial structures coexisted in
the early Late Cretaceous of southern South America. Furthermore, the new taxon
possesses a number of distinctive morphologies such as the ossified cervical
tendon, extremely pneumatized cervical vertebrae, and a habitually downward facing
snout that have rarely, if ever, been documented in other titanosaurs, thus broadening
our understanding of the anatomical diversity of this remarkable sauropod clade.
The latter two features were convergently acquired by at least one
penecontemporaneous diplodocoid, and may represent mutual specializations for
consuming low-growing vegetation.<o:p></o:p></span></div>
<br />
<div class="MsoNormal" style="line-height: normal; margin: 0cm 0cm 0pt; mso-layout-grid-align: none; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt;">Martínez RDF,
Lamanna MC, Novas FE, Ridgely RC, Casal GA, Martínez JE, et al. (2016) A Basal
Lithostrotian Titanosaur (Dinosauria: Sauropoda) with a Complete Skull:
Implications for the Evolution and Paleobiology of Titanosauria. PloS ONE
11(4): e0151661. doi:10.1371/journal. pone.0151661<o:p></o:p></span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-19340295786345985322016-04-01T13:34:00.000-07:002016-04-01T13:34:19.448-07:00A Norian lagerpetid dinosauromorph from the Quebrada del Barro Formation, Argentina<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgaCs5GiNu2vXCc5KxIz0_NJD8DewLL4xXInw-e3fWFWVwVtfcVehFDtVQLbQPuUz_OFistraKnE9MhnWJ_VThu7wciiht5jtJ06M8eL5eb7OnK-zuwNwmGepQUh3muZL90u2vVaVsMnWs/s1600/sdasda.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="305" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgaCs5GiNu2vXCc5KxIz0_NJD8DewLL4xXInw-e3fWFWVwVtfcVehFDtVQLbQPuUz_OFistraKnE9MhnWJ_VThu7wciiht5jtJ06M8eL5eb7OnK-zuwNwmGepQUh3muZL90u2vVaVsMnWs/s400/sdasda.jpg" width="400" /></a></div>
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<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<i style="mso-bidi-font-style: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Ricardo
N. Martínez, Cecilia Apaldetti, Gustavo A. Correa, And Diego Abelín<o:p></o:p></span></i></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">The early evolution of
Ornithodira the clade including pterosaurs and dinosaurs is poorly known. Until
a decade ago, the basal radiation of Dinosauromorpha, the clade including
dinosaurs and birds, was poorly understood because of the poor fossil record
restricted to specimens known from the <strong><span style="color: #660000;">Ladinian Chañares Formation in
Argentina.</span></strong> Over the last years the discovery of several non-dinosaurian
dinosauromorphs dramatically expanded this record and also demonstrated that
this group –previously restricted to de <strong><span style="color: #660000;">Middle Triassic</span></strong> survived at least well
into the <strong><span style="color: #660000;">Norian</span></strong>. Although Norian non-dinosaurian dinosauromorphs have been
reported from several regions around the world, the only known Norian non-dinosauriform
dinosauromorphs <em><strong><span style="color: #660000;">Dromomeron romeri</span></strong></em> Irmis, Nesbitt, Padian, Smith, Turner, Woody,
and Downs and <strong><em><span style="color: #660000;">Dromomeron gregorii</span></em></strong> Nesbitt, Irmis, Parker, Smith, Turner, and
Rowe come from North America. We report here the first record from the Southern
Hemisphere of a non-dinosauriform dinosauromorph, <strong><em><span style="color: #660000;">Dromomeron gigas sp. nov.,</span></em></strong>
<strong><span style="color: #660000;">from the Norian Quebrada del Barro Formation, northwestern Argentina</span></strong>. A
phylogenetic analysis recovers <em><span style="color: #660000;"><strong>Dromomeron gigas</strong></span></em> nested into the monophyletic
group <strong><span style="color: #660000;">Lagerpetidae</span></strong>, and as the sister taxon to <em><span style="color: #660000;"><strong>Dromomeron romeri.</strong></span></em> The inclusion
of D. gigas within <strong><span style="color: #660000;">Lagerpetidae</span></strong> suggests that body size increased in this
lineage over time, as was previously demonstrated for <span style="color: #660000;"><strong>Dinosauriformes</strong></span> as a
whole, and that lagerpetids reached a larger size than previously thought.
Finally, the new finding provides new information on the basal radiation of
<strong><span style="color: #660000;">Dinosauromorpha</span></strong> constituting the first record of a Norian association of
dinosaurs with non-dinosauriform dinosauromorphs outside North America.<o:p></o:p></span></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Ricardo N. Martínez,
Cecilia Apaldetti, Gustavo A. Correa, Diego Abelín (2016). A Norian lagerpetid
dinosauromorph from the Quebrada del Barro Formation, northwestern Argentina.
Ameghiniana 53: 1–13.<o:p></o:p></span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-14703936523066669852016-03-29T14:05:00.001-07:002016-03-29T14:05:06.956-07:00A new specimen of Velocisaurus unicus from Río Negro Province, Argentina<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBcIt-VJSF_f2W48htTWRCCh_2QqCWABHYf6Jx4yXKxrjW1CNWjL_ezJUzM9PytvW_nKSN4gR3Jh65ZHSrKl__oiSUL3-OyBMXBCN0BUKNbYDR8LQd2cd46Oe0rG_KGmrgO3RxuJayDHA/s1600/nuevo-1.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="358" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBcIt-VJSF_f2W48htTWRCCh_2QqCWABHYf6Jx4yXKxrjW1CNWjL_ezJUzM9PytvW_nKSN4gR3Jh65ZHSrKl__oiSUL3-OyBMXBCN0BUKNbYDR8LQd2cd46Oe0rG_KGmrgO3RxuJayDHA/s400/nuevo-1.JPG" width="400" /></a></div>
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<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<i style="mso-bidi-font-style: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Federico
Brissón Egli, Federico L. Agnolín, And Fernando Novas<o:p></o:p></span></i></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Abelisauroids are the
most abundant theropods in the Cretaceous beds of Patagonia. They are
traditionally subdivided into <strong><span style="color: #660000;">large-sized Abelisauridae</span></strong> and smaller
<span style="color: #660000;"><strong>Noasauridae.</strong></span> Here, we describe a new specimen of the small enigmatic abelisauroid
<span style="color: #660000;"><strong><i style="mso-bidi-font-style: normal;">Velocisaurus unicus</i> Bonaparte, 1991</strong></span>,
which was previously known from a single incomplete specimen from <span style="color: #660000;"><strong>Neuquén City,
Neuquén Province, Patagonia.</strong></span> The new material comes from the <strong><span style="color: #660000;">Santonian Bajo de
la Carpa Formation (Late Cretaceous) at the Paso Córdoba locality, Río Negro
Province.</span></strong> It comprises an almost complete left hind limb and offers novel
information about the anatomy of this poorly known abelisauroid. The new
material shows that <em><strong><span style="color: #660000;">Velocisaurus</span></strong></em> is remarkable in having a very short, stout,
and anteriorly bowed femur, which has a notably subtriangular cross-section at
its proximal end. The tibia is long and slender, and the anterior surface of
the distal end is anteroposteriorly flat and transversely expanded, with an
enlarged surface for the ascending process of the astragalus. The pes has a
stout third metatarsal, rod-like metatarsals II and IV, and highly modified
phalanges of digit IV. The unique combination of characters of <em><strong><span style="color: #660000;">Velocisaurus</span></strong></em> indicates
that this taxon belongs to a still poorly understood radiation of
gracile-limbed abelisauroids. The inclusion of <i style="mso-bidi-font-style: normal;"><strong><span style="color: #660000;">Velocisaurus</span></strong></i> in a comprehensive phylogenetic analysis recovers a
monophyletic Noasauridae, but with only very weak support. Detailed analysis of
features supporting the inclusion of <i style="mso-bidi-font-style: normal;"><span style="color: #660000;"><strong>Velocisaurus</strong></span>
</i>within Noasauridae is discussed, and their implications for abelisauroid
phylogeny are revisited.<o:p></o:p></span></div>
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%; mso-ansi-language: ES; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;">Federico Brissón Egli,
Federico L. Agnolín & Fernando Novas 2016. A new specimen of <em>Velocisaurus
unicus</em> (Theropoda, Abelisauroidea) from the Paso Córdoba locality (Santonian),
Río Negro, Argentina, Journal of Vertebrate Paleontology, DOI: 10.1080/02724634.2016.111915</span>Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-61130611220872530912016-03-23T20:26:00.001-07:002016-03-23T20:26:13.516-07:00Presentan un nuevo dinosaurio en el MAU: Viavenator exxoni<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEidlWRrdQY9oXLvjQx9oMis2SS5ySq3BK4eTzzkbwtlPePLCudQoWAWidPPZ_5ySOgB1Ygbb7Nr5Kl6SDi_uOJNizjzEgJl-7-_qjuAQ6mfGhi3tOAadsfcX-dbLrvOCkT4ESvht4oNPt8/s1600/12802709_505728269634425_3371148415538366412_n.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="232" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEidlWRrdQY9oXLvjQx9oMis2SS5ySq3BK4eTzzkbwtlPePLCudQoWAWidPPZ_5ySOgB1Ygbb7Nr5Kl6SDi_uOJNizjzEgJl-7-_qjuAQ6mfGhi3tOAadsfcX-dbLrvOCkT4ESvht4oNPt8/s400/12802709_505728269634425_3371148415538366412_n.jpg" width="400" /></a></div>
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<div style="text-align: justify;">
En el día de ayer, se llevó adelante la presentación formal del nuevo dinosaurio del <span style="color: #660000;"><strong>MAU</strong>, Museo Municipal <em>Argentino Urquiza</em>, Rincón de los Sauces, Neuquén</span>: <em><strong><span style="color: #660000;">Viavenator exxoni</span></strong></em>, un nuevo género y especie de abelisaurio que aporta información relevante que permite avanzar en el conocimiento de este grupo de terópodos.<br /> Este ejemplar, corresponde al primer dinosaurio carnívoro de la colección del <strong><span style="color: #660000;">MAU</span></strong>, por lo que todo el equipo del trabajo del museo y los colegas que han participado de su estudio, se encuentran muy satisfechos. Si bien el potencia<span class="text_exposed_show">l del área <strong><span style="color: #660000;"><em>La Invernada</em>,</span></strong> en el cual se viene trabajando desde hace un poco más de tres años, es inmenso, la publicación de este dinosaurio, representa el primero de una serie de otros ejemplares que han sido recuperados allí, entre los que se mencionan, varios dinosaurios titanosaurios, una descena de ejemplares de tortugas y peces.<br /> Los huesos orginales de <em><span style="color: #660000;"><strong>Viavenator</strong></span></em> se encontrarán temporalmente exhibidos al público en el laboratorio del Museo hasta fines de Marzo.</span></div>
<br />Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-35267557618312847142016-03-11T13:24:00.000-08:002016-03-11T13:24:01.636-08:00A new Upper Cretaceous Titanosaur nesting site from La Rioja, Argentina<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhIY-kEQyirGox_EtEi-vhJCqbF-8KmPvTWHFc8lmWS9tAxTIiRu4zUOCx6Y6iCrsbQI4o782IDDT0GMDf-LJVjGZ-tkyqYI5yRp12mm6_y_Z_Xj4MV_Oyj101nOOyTfxudvJw1Py6i1E/s1600/nuevo-2.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="275" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhIY-kEQyirGox_EtEi-vhJCqbF-8KmPvTWHFc8lmWS9tAxTIiRu4zUOCx6Y6iCrsbQI4o782IDDT0GMDf-LJVjGZ-tkyqYI5yRp12mm6_y_Z_Xj4MV_Oyj101nOOyTfxudvJw1Py6i1E/s400/nuevo-2.jpg" width="400" /></a></div>
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<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<i style="mso-bidi-font-style: normal;"><span style="font-family: "times new roman" , "serif";">E. Martin
Hechenleitner, Lucas E. Fiorelli, Gerald Grellettinner, <span style="mso-spacerun: yes;"> </span>Léa Leuzinger, Giorgio Basilici, Jeremías R.
A. Taborda, Sergio R. De La Vega And Carlos A. Bustamante<o:p></o:p></span></i></div>
<br />
<div class="MsoNormal" style="line-height: normal; margin: 0cm 0cm 0pt; mso-layout-grid-align: none; text-align: justify;">
<span style="font-family: "times new roman" , "serif"; font-size: 12pt;"><span style="mso-tab-count: 1;"> </span><strong><span style="color: #660000;">Cretaceous titanosaur nesting sites</span></strong>
are currently known only from Europe, Asia and South America. In the latter,
only the <span style="color: #660000;">Auca Mahuevo</span> and <span style="color: #660000;">Sanagasta </span>nesting sites have been confidently
assigned to this clade of sauropod dinosaurs. Here we report the discovery of
the first eggs and egg clutches found at <strong><span style="color: #660000;">Tama,</span></strong> a new Upper Cretaceous fossiliferous
locality in the <span style="color: #660000;"><strong>Los Llanos Formation,</strong></span> <strong><span style="color: #660000;">Sierra de Los Llanos (La Rioja, NW
Argentina).</span></strong> At least five egg clutches, several partially preserved, isolated
eggs and many eggshell fragments were discovered in a single outcrop of a
sandstone horizon which represents a cumulative palaeosol profile. Although the
mechanical and digital preparation of eggs did not reveal any embryonic remains
in ovo, the morphology of the eggs and eggshells closely matches that of
titanosaur eggs and eggshells found worldwide. The morphology and spatial
grouping of the titanosaur eggs from <strong><span style="color: #660000;">Tama,</span></strong> along with geological observations
support a burrow-nesting strategy for these dinosaurs. Although the <span style="color: #660000;">Sanagasta</span>
and <span style="color: #660000;"><strong>Tama</strong></span> eggs were found in the same stratigraphical unit and share several
morphological characters, they clearly differ in shell thickness and egg size.
This, coupled with the interpretation of different sedimentary contexts for
these nesting sites, strongly suggests that at least two different titanosaur
species nested in <span style="color: #660000;">La Rioja</span> during the <span style="color: #660000;">Late Cretaceous,</span> using different nesting
strategies. The occurrence of this new titanosaur nesting site in a semiarid
palaeoenvironment represents an interesting case study for the reproductive
biology of the titanosaur dinosaurs, particularly their labile nesting
behaviour.<o:p></o:p></span></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "times new roman" , "serif";">Hechenleitner,
EM, Fiorelli, LE, Grellettinner, G,<span style="mso-spacerun: yes;">
</span>Leuzinger, L, Basilici, G, Taborda, JRA,<span style="mso-spacerun: yes;">
</span>De La Vega, SR And Bustamante, CA. 2016. A new Upper Cretaceous
Titanosaur nesting site from La Rioja (Nw Argentina), with implications for
Titanosaur nesting strategies.</span><span style="font-family: "calibri";"> </span><span style="font-family: "times new roman" , "serif";">Palaeontology,
pp. 1–14.<o:p></o:p></span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-9535264325060310972016-03-11T06:56:00.000-08:002016-03-11T06:56:07.819-08:00Shell bone histology of the long-necked chelid Yaminuechelys (Testudines: Pleurodira) from the late Cretaceous-early Palaeocene of Patagonia <div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZntL2ayIvqYBPssGsKBBeLvFSZD9VDU1ss66SFI-Lrc3i4ugfArCiS7qN-YiWtDiZ3z-Lp4Minz9_hkGcw04WUc_GlopO3LNJ2zhxczkyYxReYxE5qhQAODiWfZX9Ka-MpDiSqyJTxIw/s1600/nuevo-1.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZntL2ayIvqYBPssGsKBBeLvFSZD9VDU1ss66SFI-Lrc3i4ugfArCiS7qN-YiWtDiZ3z-Lp4Minz9_hkGcw04WUc_GlopO3LNJ2zhxczkyYxReYxE5qhQAODiWfZX9Ka-MpDiSqyJTxIw/s400/nuevo-1.JPG" width="307" /></a></div>
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</div>
<div class="separator" style="clear: both; text-align: center;">
</div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<i style="mso-bidi-font-style: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Juan
Marcos Jannello, Ignacio A. Cerda, Marcelo S. de la Fuente<o:p></o:p></span></i></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<i style="mso-bidi-font-style: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;"><span style="mso-tab-count: 1;"> <strong><span style="color: #660000;"> </span></strong></span><strong><span style="color: #660000;">Yaminuechelys</span></strong> </span></i><span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">is
a long-necked chelid turtle whose remains have been recovered from outcrops of
the <span style="color: #660000;">Santonian- Maastrichtian and Danian of SouthAmerica</span>.With the purpose of
providing data about shell sculpturing origin and palaeoecology, the bone
histology of several shell elements (including neural, costal, peripheral and
plastral plates) of <i style="mso-bidi-font-style: normal;"><strong><span style="color: #660000;">Yaminuechelys</span></strong></i> is
described herein. Histological analysis reveals that <i style="mso-bidi-font-style: normal;"><span style="color: #660000;"><strong>Yaminuechelys</strong></span></i> shares with Chelidae the presence of interwoven
structural fibre bundles in the external cortex, and parallel-fibred bone of
the internal cortex. The presence of resorption lines in several samples
indicates that the particular ornamentation of the external surfaces
originated, at least in part, by focalized resorption and new bone deposition.
This mechanism for ornamentation origin and maintenance is here described for
the first time in a turtle. Compactness of the shell bones is consistent with
an aquatic habitat, which supports previous hypothesis based on palaeoenvironmental
and morphological data.<o:p></o:p></span></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; line-height: 115%;">Janello, JM, Cerda, IA
& de la Fuente, MS. 2016. Shell bone histology of the long-necked chelid <i style="mso-bidi-font-style: normal;">Yaminuechelys</i> (Testudines: Pleurodira)
from the late Cretaceous—early Palaeocene of Patagonia with comments on the
histogenesis of bone ornamentation. <span style="color: #131413;">Sci Nat. 103:26.DOI
10.1007/s00114-016-1346-3.</span><o:p></o:p></span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-3268327603134858732016-03-04T06:36:00.001-08:002016-03-04T06:38:05.259-08:00New Peirosaurid from Cerro Lisandro Formation, Neuquén Group, Patagonia Argentina<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUwZ06mKJHn0mPJ23G3W6UgH3qbqS4tk_7xNr9otVpjEU527aAsdKxxoKGC6Y6PgsiBbiVNdsdnITnmUjUMa85LDE-_zbousLeD2mR8zlV_eNomEgyJmrSzHcT-QOuiDZU3IDgUABVB4Q/s1600/nuevo-1.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="290" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUwZ06mKJHn0mPJ23G3W6UgH3qbqS4tk_7xNr9otVpjEU527aAsdKxxoKGC6Y6PgsiBbiVNdsdnITnmUjUMa85LDE-_zbousLeD2mR8zlV_eNomEgyJmrSzHcT-QOuiDZU3IDgUABVB4Q/s400/nuevo-1.JPG" width="400" /></a></div>
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<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<i style="mso-bidi-font-style: normal;"><span style="font-family: "times new roman" , "serif";">Francisco Barrios,
Ariana Paulina-Carabajal y Paula Bona<o:p></o:p></span></i></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "times new roman" , "serif";">Peirosaurids
are a group of Cretaceous continental crocodyliforms from Gondwana. Two species
are known from the Neuquén Group in Argentina: <strong><span style="color: #660000;"><i style="mso-bidi-font-style: normal;">Lomasuchus palpebrosus</i> (Portezuelo Formation, late Turonian–early
Coniacian)</span></strong> and <strong><i style="mso-bidi-font-style: normal;">Gasparinisuchus
peirosauroides</i> (Bajo de la Carpa and Anacleto formations, Santonian and
early Campanian, respectively).</strong> Here, we describe the first peirosaurid from
the <strong><span style="color: #660000;">Cerro Lisandro Formation, <i style="mso-bidi-font-style: normal;">Bayomesasuchus
hernandezi</i> gen. et sp. nov.</span></strong> The material corresponds to a fragmentary skull
and mandible. Although fragmentary, this is the most complete crocodyliform
specimen recorded for the Cerro Lisandro Formation. In a phylogenetic analysis <i style="mso-bidi-font-style: normal;"><strong><span style="color: #660000;">Bayomesasuchus</span></strong></i> is depicted in a polytomy
together with South American peirosaurids and the <span style="color: #660000;"><strong>African form <i style="mso-bidi-font-style: normal;">Hamadasuchus rebouli.<o:p></o:p></i></strong></span></span></div>
<br />
<div class="MsoNormal" style="margin: 0cm 0cm 10pt; text-align: justify;">
<span style="font-family: "times new roman" , "serif";">Barrios,
F. Paulina-Carabajal, A, y Bona Paula. 2016. A new Peirosaurid
(Crocodyliformes, Mesoeucrocodylia) from the Upper Cretaceous of Patagonia,
Argentina. Ameghiniana 53 (1):14-25.<o:p></o:p></span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-83107630653224747912016-02-10T18:48:00.001-08:002016-02-10T18:50:37.892-08:00A new theropod dinosaur from Patagonia<div class="text_exposed_root text_exposed" style="text-align: justify;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiT4F8QY7ECarUTYrjCFuuO6EZFepgRHxWtP1oTge_fMfNmy6oikR4nsFem-uOkfBvSRvAsLP5nCs7Mn8dg5IIFANrGvd07KnhXwVphf-j4FFkTijwMffHvOw06k5hYqqlm3FxXOS1vyOs/s1600/Viavenator.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="130" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiT4F8QY7ECarUTYrjCFuuO6EZFepgRHxWtP1oTge_fMfNmy6oikR4nsFem-uOkfBvSRvAsLP5nCs7Mn8dg5IIFANrGvd07KnhXwVphf-j4FFkTijwMffHvOw06k5hYqqlm3FxXOS1vyOs/s320/Viavenator.jpg" width="320" /></a> </div>
<div class="text_exposed_root text_exposed" style="text-align: justify;">
El <strong><span style="color: #660000;">Museo Municipal <em>Argentino Urquiza</em></span></strong> ya tiene su primer dinosaurio terópodo</div>
<div class="text_exposed_root text_exposed" style="text-align: justify;">
Ya se encuentra publicado en versión online el trabajo sobre este dinosaurio c<span class="text_exposed_show">arnívoro, un nuevo abelisaurio, que proviene de <strong><span style="color: #660000;">La Invernada (Neuquén, Argentina)</span></strong> de rocas de la <strong><span style="color: #660000;">Formación Bajo de la Carpa</span></strong>. La excelente preservación y la significativa información que aportó el ejemplar resultaron relevantes para avanzar en el conocimiento de este grupo de terópodos, los abelisaurios. <em><strong><span style="color: #660000;">Viavenator</span></strong></em> <span style="color: #660000;">("cazador del camino")</span> <strong><span style="color: #660000;"><em>exxoni </em>gen. et sp. nov.</span></strong> es el primero dado a conocer de una serie de ejemplares que han sido recuperados en la zona de<strong><span style="color: #660000;"> La Invernada</span></strong> gracias al enorme apoyo de la empresa <strong><span style="color: #660000;">Exxonmobil.</span></strong><br /> </span></div>
<div class="text_exposed_show" style="text-align: justify;">
</div>
<div class="text_exposed_show" style="text-align: justify;">
Filippi, LS, Méndez, AH, Juárez Valieri, R. & Garrido, AC. 2016. A new brachyrostran with hypertrophied axial structures reveals an unexpected radiation of latest Cretaceous abelisaurids. Creataceous Research 61:209-219.</div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0tag:blogger.com,1999:blog-681679848185864075.post-86284599850772672222016-02-02T12:40:00.000-08:002016-02-02T12:40:15.786-08:00Gigantic new dinosaur from Argentina, Mendoza Province<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCDfEeTYFenjXQ62cMfw55mrbbFTs6z-LaDlouieEBuEACrZhmU5-Q0nTymLKB2QMkZ1TtkAScm5Vfi2WcnK7TQPvE7mVRW6fj5Ev8xFBZHYwe6Y-qSR5B7xtq-JL-UmnTcQWzwE2EJA8/s1600/nuevo-1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="180" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCDfEeTYFenjXQ62cMfw55mrbbFTs6z-LaDlouieEBuEACrZhmU5-Q0nTymLKB2QMkZ1TtkAScm5Vfi2WcnK7TQPvE7mVRW6fj5Ev8xFBZHYwe6Y-qSR5B7xtq-JL-UmnTcQWzwE2EJA8/s400/nuevo-1.jpg" width="400" /></a></div>
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<div class="MsoNormal" style="line-height: normal; margin: 0cm 0cm 0pt; mso-layout-grid-align: none;">
<i style="mso-bidi-font-style: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12pt; mso-bidi-font-weight: bold;">Bernardo J. González Riga, Matthew C. Lamanna,
Leonardo D. Ortiz David,<o:p></o:p></span></i></div>
<i style="mso-bidi-font-style: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12pt; mso-bidi-font-weight: bold;">Jorge O. Calvo & Juan
P. Coria<o:p></o:p></span></i><br />
<br />
<div class="MsoNormal" style="line-height: normal; margin: 0cm 0cm 0pt; mso-layout-grid-align: none; text-align: justify;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; mso-bidi-font-weight: bold;">Titanosauria is an exceptionally diverse, globally-distributed clade of
sauropod dinosaurs that includes the largest known land animals. Knowledge of
titanosaurian pedal structure is critical to understanding the stance and
locomotion of these enormous herbivores and, by extension, gigantic terrestrial
vertebrates as a whole. However, completely preserved pedes are extremely rare
among Titanosauria, especially as regards the truly giant members of the group.
Here we describe <strong><span style="color: #660000;"><i>Notocolossus</i> <i>gonzalezparejasi </i>gen. et sp. nov.</span></strong>
from the <span style="color: #660000;"><strong>Upper Cretaceous of Mendoza Province,</strong></span> Argentina. With a powerfully-constructed
<span style="color: #660000;"><strong>humerus 1.76 m in length,</strong></span> <i><span style="color: #660000;">Notocolossus</span> </i>is one of the largest known
dinosaurs. Furthermore, the <span style="color: #660000;">complete pes</span> of the new taxon exhibits a strikingly
compact, homogeneous metatarsus—seemingly adapted for bearing extraordinary
weight—and truncated unguals, morphologies that are otherwise unknown in
Sauropoda. The pes underwent a near-progressive reduction in the number of
phalanges along the line to derived titanosaurs, eventually resulting in the reduced
hind foot of these sauropods.<o:p></o:p></span></div>
<br />
<div class="MsoNormal" style="line-height: normal; margin: 0cm 0cm 0pt; mso-layout-grid-align: none;">
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; mso-bidi-font-weight: bold;">González
Riga, BJ., Lamanna, MC., Ortiz David, LD., Calvo, JO. & Coria, JP. 2016 A
gigantic new dinosaur from Argentina and the evolution of the sauropod hind
foot. Nature. Scientific Reports. </span><span style="font-family: "Times New Roman","serif"; font-size: 12pt;">DOI: 10.1038/srep19165<span style="mso-bidi-font-weight: bold;"><o:p></o:p></span></span></div>
Leonardo Filippihttp://www.blogger.com/profile/07503318458200596079noreply@blogger.com0