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Pristichampsus
''Pristichampsus'' ("saw crocodile") is an extinct genus of pristichampsid crocodylian that grew to approximately three metres (10 ft) in length.
==History==
''Pristichampsus'' was first described and named as a species of ''Crocodilus'', ''C. rollianti'', by Gray in 1831 on the basis of remains from the Lutetian of France. Gervais (1853) assigned this species to its own genus, creating the new combination ''Pristichampsus rollianti''. Other species have been referred to this genus. The genera ''Boverisuchus'' and ''Weigeltisuchus'' from the Lutetian of Germany as well as ''Limnosaurus'' from North America were synonymized with ''Pristichampsus'' and their type species were reassigned to it. Langston (1975) found ''Limnosaurus'' to be based on non-diagnostic remains, and therefore considered it to be in its own genus, as a ''nomen dubium''. He also reassigned ''Crocodylus vorax'' from the Lutetian of Wyoming and West Texas to ''Pristichampsus''. Efimov (1988) named two additional species of ''Pristichampsus'', ''P. birjukovi'' and ''P. kuznetzovi'' from the Middle Eocene of Eastern Kazakhstan. Following a revision of the genus ''Pristichampsus'' by Brochu (2013), ''P. rollinati'' was found to be based on insufficiently diagnostic material and therefore is a ''nomen dubium''. ''Boverisuchus'' was reinstated as a valid genus, and the species ''Weigeltisuchus geiseltalensis'' was considered to be synonymous with ''B. magnifrons''. Brochu (2013) also reassigned ''P. vorax'' as the second species of ''Boverisuchus''. According to Brochu (2013), material from the middle Eocene of Italy and Texas may represent other species of ''Boverisuchus''.
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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