Acanthoclymenia

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.

Species and distribution

 * Acanthoclymenia neapolitana Clarke, 1898 : ca 383.7 - 376.1 mya of USA (New York) and Australia.
 * Acanthoclymenia forcipifer Sandberger & Sandberger, 1851 : ca 378.7 - 376.9 mya of Algeria, Germany, Great Britain Kazakhstan and China (Guangxi and Guizhou).
 * Acanthoclymenia genundewa Clarke, 1899 : ca 383.3 - 382.7 mya of USA (New York) and Poland.
 * Acanthoclymenia planorbis Sandberger & Sandberger, 1851 : ca 377.5 - 376.9 mya of USA (New York).

There were more finds of this genus, but without valid description:


 * Acanthoclymenia aff. genundewa Clarke, 1898 : ca 378.7 - 376.9 mya of USA (West Virginia) and Russia (Southern Timan).
 * Acanthoclymenia aff. neapolitana Clarke, 1898 : ca 383.7 - 376.1 mya of Australia.
 * Acanthoclymenia n.sp. juv. Becker et al. 2000 : ca 378.7 - 377.5 mya of Russia (Southern Timan).