Portal de Periódicos da CAPES

New information on Wumengosaurus delicatomandibularis Jiang et al., 2008 (Diapsida: Sauropterygia), with a revision of the osteology and phylogeny of the taxon

2011; Taylor & Francis; Volume: 31; Issue: 1 Linguagem: Inglês

10.1080/02724634.2011.546724

1937-2809

Xiao‐Chun Wu, Yen-Nien Cheng, Chun Li, Li-Jun Zhao, Tamaki Sato,

Ichthyology and Marine Biology

ABSTRACT Wumengosaurus delicatomandibularis Jiang et al., 2008 Jiang, D.-y., Rieppel, O., Motani, R., Hao, W.-c., Sun, Y.-l., Schmitz, L. and Sun, Z.-y. 2008. A new middle Triassic eosauropterygian (Reptilia, Sauropterygia) from southwestern China. Journal of Vertebrate Paleontology, 28: 1055–1062. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar], is restudied on the basis of three new specimens. Many elements of the skeleton that were either briefly or not described at all in the original study are detailed. With the additional information derived from the new specimens, we have revised the diagnosis of W. delicatomandibularis. A phylogenetic analysis further demonstrates that the Pachypleurosauria is not a monophyletic group and questions that W. delicatomandibularis is closely related to the Pachypleurosauria. W. delicatomandibularis might represent the basal-most member of a monophyletic clade that includes the Nothosauroidea and those taxa assigned to the 'Pachypleurosauria.' The five known specimens show morphological variation in W. delicatomandibularis, as in Keichousaurus and in pachypleurosaurs such as Neusticosaurus and Serpianosaurus.