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rauisuchidae
Rauisuchidae is a group of large (up to 6 meters or more) predatory Triassic archosaurs.. There is some disagreement over which genera should be included in the Prestosuchidae, which in Rauisuchidae, and which in the Poposauridae, and indeed whether these should even be thought of as separate families. Rauisuchids occurred throughout much of the Triassic, and may have first occurred in the Early Triassic if some archosaurian taxa such as ''Scythosuchus'' and ''Tsylmosuchus'' are considered to be within the family.
An early cladistic analysis of crocodylotarsan archosaurs included ''Lotosaurus'', ''Fasolasuchus'', ''Rauisuchus'', and "the Kupferzell rauisuchid" (later called ''Batrachotomus'') within Rauisuchidae.〔Parrish JM. 1993. Phylogeny of the Crocodylotarsi, with reference to archosaurian and crurotarsan monophyly. ''Journal of Vertebrate Paleontology'' 13: 287-308.〕 However, a later study found that ''Batrachotomus'' was more closely related to ''Prestosuchus'', and thus was a prestosuchid.〔Gower DJ. 2002. Braincase evolution in suchian archosaurs: evidence from the rauisuchian ''Batrachotomus''. ''Zoological Journal of the Linnean Society'' 136: 49-76.〕 In addition, the toothless ''Lotosaurus'' has been found to be more closely related to the Ctenosauriscidae, a clade of ''Dimetrodon''-like animals with sails on their backs.〔Nesbitt SJ. 2005. Osteology of the Middle Triassic pseudosuchian archosaur ''Arizonasaurus babbitti''. ''Historical Biology'' 17: 19-47.〕
Two genera previously classified as poposaurids, are in fact rauisuchids. These include ''Teratosaurus''〔Long RA, Murry PA. 1995. Late Triassic (Carnian and Norian) tetrapods from the Southwestern United States. ''New Mexico Museum of Natural History & Science Bulletin'' 4: 1-254.〕〔Galton PM, Walker AD. 1996. ''Bromsgroveia'' from the Middle Triassic of England, the earliest record of a poposaurid thecodontian reptile (Archosauria: Rauisuchia). ''Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen'' 201 (3): 303-325.〕 and ''Postosuchus''.〔Weinbaum JC, Hungerbühler A. 2007. A revision of ''Poposaurus gracilis'' (Archosauria: Suchia) based on two new specimens from the Late Triassic of the southwestern U.S.A. ''Palaeontologische Zeitschrift'' 81(2):131-145.〕
==Genera==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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