''Kammerkaroceras'' is an extinct cephalopod genus from the Lower Jurassic belonging to the

ammonoid Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...

family

Psiloceratidae Psiloceratidae is an extinct family of cephalopods belonging to the ammonite subclass. Description The Psiloceratidae are evolute, smooth or with blunt primary ribbing. The venter is rounded and generally smooth, in some feebly keeled. Sutures a ...

. The shell of ''Kammerkaroceras'' is involute, all whorls except for the outermost hidden from view, discoidal with sigmoidal ribs that branch on the sides and cross over the rounded venter.

References

* W. J. Arkell ''et al.'', 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleongology, Part L. Geological Society of America and University of Kansas Press. Psiloceratidae Ammonitida genera Jurassic ammonites Ammonites of Europe Hettangian life {{Ammonitina-stub