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Haydenoceras : ウィキペディア英語版 | Haydenoceras
''Haydenoceras'' is a middle Devonian cephalopod originally placed in the Barrandeocerida. The genus can be recognized by its strongly compressed, gradually expanding exogastrically curved shell with a strongly rounded dorsum and acutely angled venter, calling attention to the general form of earlier ''Bassleroceras''. The siphuncle is tubular, central. Related genera include ''Avilionella'', ''Barrandeoceras'', ''Gasconsoceras, ''Laureloceras, and ''Savageoceras''. ==References==
* Walter C. Sweet 1964. Natiloidea - Barrandeocerida, Treatise on Invertebrate Paleontology Part K. Geological Society of America and University of Kansas Press.
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「Haydenoceras」の詳細全文を読む
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