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.^[1][3] Species of this genus had discoidal shells with flattened venter.^[2]

Acanthoclymenia Temporal range: upper Givetian - lower Frasnian[1][2][3] PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Ammonoidea
Order:	Clymeniida
Suborder:	Anarcestina
Superfamily:	Beloceratoidea
Family:	Acanthoclymeniidae
Genus:	Acanthoclymenia Hyatt, 1900
Type species
Acanthoclymenia neapolitana Clarke, 1898

Species and distribution

^[1][3]

• 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).