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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Allognathosuchus ： ウィキペディア英語版 Allognathosuchus ''Allognathosuchus'' is an extinct genus of alligatorine crocodylian with a complicated taxonomic history. It was a medium sized predator up to 1.5 m in length.〔http://eocene.dmns.org/eocene-paleozoo/allognathosuchus/〕 This small alligatorine is known for its stout jaws and bulbous teeth, found near the rear of the tooth row in upper and lower jaws. These adaptations have historically been interpreted as having been for crushing mollusks. Isolated bulbous teeth are often assigned to this genus, although such teeth are known from other crocodyliform lineages. The type species, ''A. polyodon'', is from the Eocene-age Bridger Formation of Wyoming; it is based on fossils that are difficult to distinguish from other Paleogene alligatorids. ''A. heterodon'' is from the Eocene-age Wasatch Formation of Wyoming, ''A. wartheni'' is from the Eocene-age Wildwood Formation (also known as the "Wildwood alligatorid," and possibly two species), and ''A. woutersi'', which may belong to ''Diplocynodon'' instead, is from the Early Eocene of Belgium. ''A. polyodon'', ''A. heterodon'', and ''A. wartheni'' span the Clarkforkian, Wasatchian, and Bridgerian North American Land Mammal Ages. Several other genera and species have been assigned to ''Allognathosuchus'' over the years, giving it a potential Upper Cretaceous-Oligocene stratigraphic range, and a geographic range covering North America, Europe, and Africa. Christopher Brochu reviewed the genus in 2004 and, in light of the fragmentary remains of several of the species involved, recommended conservative usage of the genus. He excluded ''Albertochampsa langstoni'', ''Arambourgia gaudryi'', and ''Wannaganosuchus brachymanus'' from ''Allognathosuchus'', and, finding the species ''Allognathosuchus haupti'' and ''A. mooki'' to not group with ''A. polyodon'' to the exclusion of other alligatorines, recommended using previously established generic names for those species instead: ''Hassiacosuchus haupti'' and ''Navajosuchus mooki''.〔 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Allognathosuchus」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.