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Pachydesmoceras : ウィキペディア英語版 | Pachydesmoceras
''Pachydesmoceras'' is a genus of ammonites belonging to the family Desmoceratidae. Species of this genus were fast-moving nektonic carnivorous shelled cephalopods. They lived during the Cretaceous, from the Albian (112.0-99.6 Mya) to the Santonian (85.8-83.5 Mya) stage. ==Distribution== Cretaceous of Antarctica, Cameroon, India, Japan, Nigeria, Romania, United States (California).
File:Pachydesmoceras pachydiscoide.jpg|Fossil of ''Pachydesmoceras pachydiscoide'' from Japan. Exhibit in the National Museum of Nature and Science, Tokyo, Japan.
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「Pachydesmoceras」の詳細全文を読む
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