''Acrimeroceras'' is an oxyconic

Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, whe ...

goniatite and one of three genera included in the subfamily Paratornoceratinae. The others being '' Paratornoceras'' and ''

Paratoceras ''Paratoceras'' is an extinct genus of Artiodactyla, of the family Protoceratidae, endemic to North America. They lived during the Early to Middle Miocene, 20.4—10.3 Ma, existing for approximately . ''Paratoceras'' resembled deer, but were mor ...

'' 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.

References

* 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'' i
Goniat Taxonomy

Acrimeroceras- Paleodb
* Miller, Furnish, and Schindewolf. Paleozoic Ammonoidea.

Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ...

, Part L. R.C. Moore (Ed). Geological Society of America, 1957. Dimeroceratidae Goniatitida genera Fossils of Morocco {{Goniatitida-stub