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Wangisuchus
''Wangisuchus'' is an extinct genus of archosauriform reptile from the Middle Triassic of China that is known from fragmentary fossil jaw bones. These bones were found at the Hsishihwa locality in the upper Ermaying Formation, which dates to the late Anisian stage about 242 million years ago. ''Wangisuchus'' was named in 1964 by Chinese paleontologist Yang Zhongjian, who described a single species, ''Wangisuchus tzeyii'', on the basis of these bones.〔
==Classification==
Yang classified ''Wangisuchus'' in the family Euparkeriidae, which also includes the much better known ''Euparkeria'' from the Early Triassic of South Africa. He diagnosed ''Wangisuchus'' by the following characters: long and low shape of the maxilla; pointed posterior process of the maxilla; rounded anterior margin of the maxilla; thecodont tooth implantation; crurotarsal (crocodile-like) structure of the ankle.〔Young CC. 1964. The pseudosuchians in China. Palaeontologia Sinica 151:1-205〕
Later authors noted that a calcaneum or ankle bone referred to ''Wangisuchus'' by Yang more closely resembles that of a suchian archosaur, although they didn't discuss whether IVPP V.2701 might be a suchian or euparkeriid.〔Kuhn O. 1976. Handbuch der Paläoherpetologie. Stuttgart/New York: Gustav Fischer Verlag.〕〔Gower DJ, Sennikov AG. 2000. Early archosaurs from Russia. In: Benton MJ, Shishkin MA, Unwin DM, Kurochkin EN, eds. The age of dinosaurs in Russia and Mongolia. New York: Cambridge University Press. 140-159〕〔Parrish MJ. 1993. Phylogeny of the Crocodylotarsi, with reference to archosaurian and crurotarsan monophyly. Journal of Vertebrate Paleontology 13:287-308〕〔Sterling J. Nesbitt (2009). "The early evolution of archosaurs: Relationships and the origin of major clades". Columbia University (open access dissertation): 1–632.〕 In their review of putative euparkeriids from China, Richard Butler and colleagues concluded that ''Wangisuchus'' is a ''nomen dubium'' at Archosauriformes indeterminate because its holotype lacked diagnostic characters, even though the thecodont tooth implantation pointed to a closer relationship to Archosauria than to ''Proterosuchus''.〔Sookias RB, Sullivan C, Liu J, Butler RJ. (2014) Systematics of putative euparkeriids (Diapsida: Archosauriformes) from the Triassic of China. PeerJ 2:e658 http://dx.doi.org/10.7717/peerj.658〕
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