Katepensaurus goicoecheai a Late Cretaceous Rebbachisaurid from central Patagonia
Publicado por Leonardo Filippi en 7:31
Lucio M. Ibiricu, Gabriel A. Casal,
Rubén D. Martínez, Matthew C. Lamanna, Marcelo Luna, And Leonardo Salgado.
We
describe Katepensaurus goicoecheai, gen. et sp. nov., a diplodocoid
sauropod dinosaur from the Bajo Barreal Formation (Upper Cretaceous: Cenomanian–Turonian)
of south-central Chubut Province, central Patagonia, Argentina. The holotypic
specimen is a closely associated partial axial skeleton that includes cervical,
dorsal, and caudal vertebrae. The dorsal vertebrae of Katepensaurus exhibit
the following distinctive characters that we interpret as autapomorphies: (1)
internal lamina divides lateral pneumatic fossa of centrum; (2) vertical ridges
or crests present on lateral surface of vertebra, overlying neurocentral
junction; (3) pair of laminae in parapophyseal centrodiapophyseal fossa; (4)
transverse processes perforated by elliptical fenestrae; and (5) well-defined,
rounded fossae on lateral aspect of postzygapophyses. Based on the results of previous
phylogenetic analyses, we regard the new taxon as a member of Rebbachisauridae;
more specifically, it may pertain to Limaysaurinae, a rebbachisaurid subclade
that, to date, is definitively known only from southern South America. As
currently understood, the rebbachisaurid fossil record suggests that the clade
achieved its greatest taxonomic diversity within a few million years of its
extinction during the early Late Cretaceous.
Ibiricu,
L.M., Casal, G.A., Martínez, R.D., Lamanna, M.C., Luna, M. And Salgado, L.
2013. Katepensaurus goicoecheai, gen.
et sp. nov., a Late Cretaceous Rebbachisaurid (Sauropoda, Diplodocoidea) from
central Patagonia, Argentina. Journal of Vertebrate Paleontology
33(6):1351–1366.
Subscribe to:
Enviar comentarios (Atom)
0 comentarios:
Publicar un comentario