期刊
PALAEONTOLOGY
卷 54, 期 -, 页码 63-78出版社
WILEY
DOI: 10.1111/j.1475-4983.2010.01002.x
关键词
Testudinata; Upper Cretaceous; Patagoniaemys gasparinae; phylogeny; formed cervical vertebrae
类别
资金
- PIP (Proyecto de Investigacion Plurianual) [112-200801-00795]
Patagoniaemys gasparinae gen. et sp. nov. is a new stem turtle found in central Patagonia, Chubut Province, Argentina, in outcrops of the La Colonia Formation (Campanian-Maastrichtian). This is a turtle of relatively large size (carapace length c. 70 cm), and the preserved remains of the holotype consist of skull fragments and several postcranial elements including a nearly complete vertebral column. A phylogenetic analysis shows Patagoniaemys gasparinae gen. et sp. nov. forming a monophyletic group with Otwayemys cunicularius and Mongolochelys efremovi, as a sister group to Meiolaniidae. A comprehensive review confirms that formed cervical vertebrae appeared independently several times during turtle evolution: in the clade that includes Patagoniaemys gasparinae gen. et sp. nov. and Meiolaniidae, in some baenids, in the total group Pleurodira and in crown group Cryptodira. Likewise, formed caudal vertebrae appeared several times in turtle evolution.
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