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Protitanichthys : ウィキペディア英語版 | Protitanichthys
''Protitanichthys'' is a genus of comparatively large coccosteid arthrodire placoderm from the Middle Devonian of the eastern United States. Fossils are found primarily in the Eifelian-epoch aged Delaware Limestone of Ohio, and the Lower Givetian-aged Rockport Quarry of Michigan ==Anatomy== ''Protitanichthys'' is very similar to other coccosteids, though the skull is proportionally narrower, and the orbits are comparatively smaller. As mentioned earlier, species are quite large for coccosteids, surpassed only in size by the Old World genus, ''Livosteus''.〔
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「Protitanichthys」の詳細全文を読む
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