Order Goniatitida Rank Genus | Suborder Anarcestina | |
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Acanthoclymenia is genus of ammonoid cephalopods belonging to the Acanthoclymeniidae family. Species belonging to this genus lived in middle and late Devonian (upper Givetian - lower Frasnian). Its fossils were found in Europe, Asia, north Africa, North America and Australia. Species of this genus had discoidal shells with flattened venter.
There were more finds of this genus, but without valid description:
References
Acanthoclymenia Wikipedia(Text) CC BY-SA