A new vertebrate assemblage from the Bajo de la Carpa Formation (Upper Cretaceous, Neuquén Group), Neuquén Basin, Argentina
Publicado por Leonardo Filippi en 16:41
L.S. Filippi1,
R.D. Juarez Valieri2 y C.A. Garrido3
Here we report the recovery of a new
terrestrial vertebrate assemblage coming from Bajo de la Carpa Formation levels
at La Invernada, an oil-field area located 50 kilometers southwestern Rincón de
los Sauces city, Neuquén, Argentina. These specimens were detected due to a
project of the Museo Argentino Urquiza and Exxon Mobil Company, whose principal
objective is the protection of the paleontological legacy from the area. The
assemblage is composed by: (1) at least two individuals (one of them juvenile) of
titanosaurian sauropods, including cervical, dorsal, and caudal vertebrae, an incomplete
sacrum articulated to the right ilium and a portion of the left one, a juvenil
rigth ilium, rigth pubis and isquium, articulated left scapula and humerus,
distal end of the left ulna, three left
metacarpals (one incomplete), and dorsal ribs; (2) a partial but well-preserved
specimen of abelisaurid theropod, composed by a complete braincase fused to the
frontals, postorbitals and squamosals, cervical, dorsal and caudal vertebrae,
cervical and dorsal ribs, and a distal chevron; and finally (3) a specimen of chelid
turtle with a complete caparace of 68 centimeters long. Although the specimens
come from different points separate about 300 meters each other, all the
remains are located in the same approximate levels of the Bajo de la Carpa
Formation, allowing us to infer that the represented species cohabited and
probably interacted during Santonian – ealy Campanian times.
1 Museo Municipal Argentino Urquiza.
Jujuy y Chaco s/n, 8319, Rincón de los Sauces, Neuquén, Argentina.
2 Secretaría de Cultura de la Provincia de Río
Negro, 8332 General Roca, Río Negro, Argentina.
3 Museo Provincial de Ciencias Naturales
Prof. Dr. Juan Olsacher, Dirección Provincial de Minería. Etcheluz y Ejército
Argentino, 8340, Zapala, Neuquén, Argentina.
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