Temporal range: Middle Triassic, 242Ma
Wangisuchus is an extinct genus of archosauriform reptile from the Middle Triassic of China that is known from fragmentary fossil jaw bones, teeth, vertebrae, and limb 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.
Yang classified Wangisuchus in the family Euparkeriidae, which also includes the much better known Euparkeria from the Early Triassic of South Africa. More recent studies have noted that a calcaneum or ankle bone referred to Wangisuchus by Yang more closely resembles that of a suchian archosaur. If Wangisuchus is a suchian, it would be grouped within crocodile-line archosaurs (archosaurs more closely related to crocodilians than to birds). Since Euparkeria has an evolutionary position more basal than the crocodile- and bird-line archosaur split, Wangisuchus would not be a close relative. However, the isolated calcaneum bone may belong to a different species than the one that was the source of the jaw bones, which provide most of the important characteristics that could be used to classify Wangisuchus. Therefore, the evolutionary position of Wangisuchus relative to other Triassic archosauriforms is still uncertain. Another study also pointed out that Wangisuchus most likely represents a chimera, and while all specimens referred to it (including the holotype IVPP V 2701, left maxilla) are more derived than erythrosuchids in relation to Archosauria, some of the material belongs to a suchian.
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