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Arctoptychites : ウィキペディア英語版 | Arctoptychites
''Arctoptychites'' is an extinct cephalopod genus belonging to the ceratitid family Ptychitidae, and related to such genera as ''Ptychites'' and ''Aristoptychites''; all from the Triassic. () The Ptychitidae, to which ''Arctoptychites'' belongs, is a family of ceratitid ammonites (''sensu lato'') with ammonitic sutures and variably subglobular to compressed, ribbed or smooth, generally evolute shells. () --------- () (''Arctoptychites'' Paleodb ) () Treatise on Invertebrate Paleontology, Part L (1957),Mesozoic Ammonoidea p.L180.
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「Arctoptychites」の詳細全文を読む
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