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Angistorhinus
''Angistorhinus'' (meaning "narrow snout" or "hook snout") is an extinct genus of phytosaur known from the Late Triassic period of Texas and Wyoming, USA. It was first named by Mehl in 1913 and the type species is ''Angistorhinus grandis''. Other species from Texas and Wyoming, ''A. alticephalus'' (Stovall and Wharton, 1936), ''A. gracilis'' (Mehl, 1915) and ''A. maximus'' (Mehl, 1928), are cospecific with the type species. ''Angistorhinus'' is known from the holotype UC 631, partial skull and lower jaws recovered from the Popo Agie Formation, Chugwater Group, Wyoming and from the associated paratype UM 531, a partial skull, TMM 31098-1, skull and lower jaws and ROM 7977, partial skull and lower jaws, recovered from the 'Pre-Tecovas Horizon' in the Dockum Group, Texas. A possible second species, ''A. talainti'' is known from the Triassic of Morocco. In 1995, Long and Murry created the new combination, ''Angistorhinus megalodon'' by synonymy for ''Brachysuchus''. Hungerbühler and Sues (2001) hypothesised that ''Angistorhinus'' is a junior synonym of ''Rutiodon''. However, in 2010 Michelle R. Stocker retained the validity of ''Brachysuchus'' and of ''A. grandis''.
==Description==
''Angistorhinus'' was another of the early phytosaur genera. It was similar to ''Parasuchus'' but differed in having the nostrils located further back, towards and above the eyes. This was a more specialized condition that characterized all late phytosaurs. ''Angisthorhinus'' was a huge animal by any standards; the skull length was generally about 120 cm; estimated overall length to 8 meters, more in ''A. megalodon'', a very large, short and heavy-muzzled form sometimes given its own genus (''Brachysuchus''), and which far exceeded in size any living crocodile.〔http://palaeos.com/mesozoic/triassic/carnian2.htm〕
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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