''Aristoceras'' is a Late Paleozoic goniatitid genus included in the

Goniatitina Goniatitina is one of two suborders included in the order Goniatitida; extinct Paleozoic Ammonoidea, ammonoid cephalopods only distantly related to the Nautiloidea. Taxonomy The Goniatitina contains 17 defined superfamilies, listed below. * Adr ...

suborder in which the lobes of the external suture are irregularly serrate. ''Aristoceras'', named by Ruzencev, 1950, may be a synonym for '' Euthalassoceras'' Miller and Furnish, 1940. The family to which it belongs, the

Thalassoceratidae Thalassoceratidae a family of late Paleozoic ammonites included in the goniatitid superfamily Thalassoceratoidea along with the Bisatoceratidae. Some eight genera are included, although the specific number and exactly which depends on the part ...

is now part of the

Thalassoceratoidea Thalassoceratoidea, formerly Thalassocerataceae, is a superfamily of Late Paleozoic ammonites characterized by their thick-discoidal to subglobular, involute shells with narrow or closed umbilici and biconvex growth striae with ventral sinuses. ...

, but used to be included in the

Dimorphocerataceae Dimorphoceratoidea is one of seventeen superfamilies included in the ammonoid suborder Goniatitina Goniatitina is one of two suborders included in the order Goniatitida; extinct Paleozoic Ammonoidea, ammonoid cephalopods only distantly relate ...

with the Dimorphoceratidae.

References

* *''Aristoceras'' i
GONIAT
6/9/12 * Fossils of Kazakhstan Goniatitida genera Thalassoceratoidea Permian ammonites Pennsylvanian first appearances Cisuralian genus extinctions {{Goniatitida-stub