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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 Homodontosaurus ： ウィキペディア英語版 Homodontosaurus ''Homodontosaurus'' is an extinct genus of therocephalian therapsid from the Late Permian of South Africa. The type species ''Homodontosaurus kitchingi'' was named by South African paleontologist Robert Broom in 1949. Broom based his description on a small skull found in the ''Cistecephalus'' Assemblage Zone near Graaff-Reinet. The skull is very small, at about long and wide. ''Homodontosaurus'' has large eye sockets and an elongated snout. The lower jaw is long, thin, and curved. Numerous small teeth line the upper jaw and are long, pointed, and round in cross-section. When he first named ''Homodontosaurus'' in 1949, Broom considered it to be a pelycosaur. He noted similarities between the skull of ''Homodontosaurus'' and that of the sphenacodontid ''Secodontosaurus'' from the Early Permian of Texas. Broom thought that ''Homodontosaurus'' was most closely related to a pelycosaur called ''Elliotsmithia'', which he named in 1937 on the basis of the back half of a skull.〔 In 1950, South African paleontologist A. S. Brink described a second specimen of ''Homodontosaurus'', which included an articulated postrcranial skeleton. On the basis of this skeleton, paleontologists D. M. S. Watson and Alfred Romer reclassified it as a scaloposaurid therocephalian in 1956. Scaloposaurids are now recognized as an artificial grouping of the juvenile forms of many therocephalians. ''Homodontosaurus'' has even been considered the juvenile form of the larger therocephalian ''Tetracynodon''. ''Homodontosaurus'' and most other scalopodontids are now classified as basal members of Baurioidea. ==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「Homodontosaurus」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.