''Peronoceras'' is genus of
ammonite
Ammonoids are extinct, (typically) coiled-shelled cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses, squid, and cuttlefish (which comprise the clade Coleoidea) than they are to nautiluses (family N ...
that lived during the
middle Toarcian stage of
early Jurassic
The Early Jurassic Epoch (geology), Epoch (in chronostratigraphy corresponding to the Lower Jurassic series (stratigraphy), Series) is the earliest of three epochs of the Jurassic Period. The Early Jurassic starts immediately after the Triassicâ ...
. Members of this genus existed only in Fibulatum Subzone of Bifrons Zone. Their fossils were found in Europe, northern Africa, Asia, North America and South America.
Description
Form of their shell could range from depressed cadicone to compressed ellipsocone. Whorl section is quadrangular and has flat sides and venter. Ribs are present and they are fine to distant. They were always fibulate with the exception of inner whorls of finely ribbed species. On ventrolateral position, there were tubercules.
References
Dactylioceratidae
Toarcian life
Early Jurassic ammonites of Europe
Ammonites of Africa
Ammonites of Asia
Ammonites of North America
Ammonites of South America
Ammonitida genera
{{Ammonitina-stub