Aipoceras is a genus of loosely coiled aipoceratid nautiloids with laterally compressed whorls; shells expanding moderately to fairly rapidly with a tendency to uncoil at maturity.

Juvenile forms are somewhat cyrtoconic.

The apical end forms a hook.

Aipoceras has been found in Lower Mississippian strata in the U.S.

This prehistoric nautiloid-related article is a stub.