Manitoulinoceras

{{Short description|Extinct genus of molluscs}}

{{Automatic taxobox

| fossil_range = {{Fossilrange|460.9|445.6|Late Ordovician}}

| image =

| taxon = Manitoulinoceras

| authority = Foeste, 1924

}}

Manitoulinoceras is a genus of Late Ordovician oncocerid nautiloid cephalopods, found in North America (Kentucky, Ohio, Indiana, and Ontario). The shell is cyrtoconic, exogastric, more strongly curved than in Kindleoceras. The cross-section is somewhat wider than high, with a somewhat flattened upper side, known as the dorsum. Actinosiphonate deposits in the siphuncle are confined to the early part of the phragmocone.

Staufferoceras, a valcuouroceratid from the Middle and Upper Ordovician of Minnesota and Ohio named by Foeste, 1932, is much like Manitoulinoceras but with a living chamber that is swollen in the middle, narrowing toward the aperture.