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Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Cephalopoda
Subclassis: † Ammonoidea
Ordo: Goniatitida
Subordo: Tornoceratatina
Superfamilia: Dimerocerataceae
Familia: Dimeroceratidae
Subfamilia: Paratornoceratinae
Genus: Acrimeroceras

Paratornoceratinae Becker, 1993
The Paleobiology Database Accessed 10/8/07

Acrimeroceras is an oxyconic Devonian gonitite and one of three genera included in the subfamily Paratornoceratinae. The others being Paratornoceras and Paratoceras or ex Polonites.

Acrimeroceras has a shell like that of Paratornoceras with biconvex growth lines and constrictions and simple dorsal lobe. The adult shell is extremely compressed, smooth, oxyconic to lanceolate in section. Early growth stages are depressed, subglobular, smooth or ribbed, with an open umbilicus and rounded to suboxyconic venter, which sharpens relatively early during ontogeny. Sutural elements in general are broadly rounded except for the lateral lobe which is pointed and asymmetric.

Morphometric Analyses and Taxonomy of Oxyconic Goniatites (Paratornoceratinae n. subfam) from the Early Famennean Tafilalt of the (Anti-Atlas, Morocco) in Proceedings of the Geological Survey, 57, Vienna, 2002.
Acrimeroceras in Goniat Taxonomy
Acrimeroceras- Paleodb
Miller, Furnish, and Schindewolf. Paleozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L. R.C. Moore (Ed). Geological Society of America, 1957.

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