''Lithacoceras'' is an extinct

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 ...

cephalopod genus included in the superfamily Perisphinctoidea. These fast-moving nektonic carnivores lived during the

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately 143.1 Mya. ...

period, from the Oxfordian age to the

Tithonian In the geological timescale, the Tithonian is the latest age (geology), age of the Late Jurassic Epoch and the uppermost stage (stratigraphy), stage of the Upper Jurassic Series. It spans the time between 149.2 ±0.7 annum, Ma and 143.1 ±0.6 (mi ...

age.

Distribution

Fossils of species within this genus have been found in the

sediments of Antarctica, Argentina, Canada, Cuba, France, Germany, Madagascar, Somalia, Spain, United States and Yemen.Paleobiology Database - Lithacoceras
2017-10-19.

References

* Wojciech Brochwicz-Lewiński
Middle Oxfordian representatives of the genera Lithacoceras Hyatt, 1900, and Liosphinctes Buckman, 1925, from the Polish Jura Chain
Jurassic ammonites Ammonites of North America Ammonitida genera Perisphinctoidea {{Ammonitina-stub