翻訳と辞書 Words near each other ・ Brachycephalus pombali ・ Brachycephalus verrucosus ・ Brachycephalus vertebralis ・ Brachycephaly ・ Brachycera ・ Brachyceratops ・ Brachyceridae ・ Brachycerinae ・ Brachycerini ・ Brachycerus ・ Brachycerus barbarus ・ Brachycerus bufo ・ Brachycerus ornatus ・ Brachychalcinus ・ Brachychalcinus orbicularis ・ Brachychampsa ・ Brachychilus ・ Brachychira ・ Brachychira ferruginea ・ Brachychiton ・ Brachychiton acerifolius ・ Brachychiton australis ・ Brachychiton bidwillii ・ Brachychiton carruthersii ・ Brachychiton collinus ・ Brachychiton compactus ・ Brachychiton discolor ・ Brachychiton diversifolius ・ Brachychiton garrawayae ・ Brachychiton gregorii Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Brachychampsa ： ウィキペディア英語版 Brachychampsa ''Brachychampsa'' is an extinct genus of alligatoroid. Specimens have been found from New Mexico, Colorado, Wyoming, Montana, North and South Dakota, New Jersey, and Saskatchewan. One specimen has been found from the Darbasa Formation of Kazakhstan, although the species status is indeterminant for the fossil. The genus first appeared during the late Campanian stage of the Late Cretaceous (Judithian North American stage) and went extinct during the early Danian stage of the Paleocene (Puercan North American stage), a few million years after the Cretaceous–Paleogene extinction event. ''Brachychampsa'' is distinguished by an enlarged fourth maxillary tooth in the upper jaw. ''Brachychampsas position within the superfamily Alligatoroidea has undergone many revisions since it was first named. Originally it was placed within the family Alligatoridae, and was later refined to the subfamily Alligatorinae in 1964,〔 only to be placed outside both Alligatorinae and Alligatoridae (but still within Alligatoroidea) in 1994. ==Species== The type species of ''Brachychampsa'' is ''B. montana'', first discovered from the Hell Creek Formation of Montana and described by Charles W. Gilmore in a paper in 1911. In that same paper, Gilmore recombined ''Bottosaurus perrugosus'' as a new species of ''Brachychampsa'', called ''B. perrugosus''.〔 The holotype specimen of ''B. perrugosus'' went missing as the paper was being written, but it was later rediscovered and soon afterward designated as a nomen dubium due to a lack of diagnostic features that distinguish it from other alligatorids discovered since the paper was published.〔 Another species from the Allison Member of the Menefee Formation of the San Juan Basin, ''B. sealeyi'', was discovered in 1996, but was later argued to be synonymous with ''B. montana'' by interpreting it as an immature specimen of the latter species. However, other studies claim that some of the variation seen between the two species, such as the orientation of the maxillary tooth row, may not be ontogenic, thus making ''B. sealeyi'' a valid taxon. 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「Brachychampsa」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.