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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 Ictidodraco ： ウィキペディア英語版 Ictidodraco ''Ictidodraco'' is an extinct genus of therocephalian therapsid from the Late Permian of South Africa. The type species ''Ictidodraco longiceps'' was named by South African paleontologists Robert Broom and John T. Robinson in 1948 from the ''Cistecephalus'' Assemblage Zone. ''Ictidodraco'' was once classified as a scaloposaurian in the family Silpholestidae. Scaloposauria and Silpholestidae are no longer regarded as valid groups, and ''Ictidodraco'' is now classified as a basal member of the clade Baurioidea. ==Description== ''Ictidodraco'' is a small therocephalian with a long, pointed snout. It has large orbits or eye sockets that are enclosed by complete postorbital bars at the back margin of the sockets. The temporal openings behind the orbits are relatively small. At the top of the skull, between the two temporal openings, the parietal region is wide. Unlike those of other therocephalians, the parietal does not form a distinctive sagittal crest. As in other advanced therocephalians ''Ictidodraco'' has a small secondary palate. A secondary palate is a derived feature that gives advanced therocephalians a very mammal-like appearance, although it developed independently the group as a result of convergence. 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「Ictidodraco」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.