''Aegoceras'' (''Beaniceras'') is small, coarsely ribbed subgenus
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 ...
from the
Lower Jurassic
The Early Jurassic Epoch (in chronostratigraphy corresponding to the Lower Jurassic Series) is the earliest of three epochs of the Jurassic Period. The Early Jurassic starts immediately after the Triassic–Jurassic extinction event, 201.3 Ma&nb ...
with coarsely ribbed rounded whorls. The shell is evolute, early whorls a barrel-shaped cadicone, later become serpenticonic.
Distribution
Jurassic of France, Germany and Spain
References
;Notes
;Bibliography
* Treatise on Invertebrate Paleontology, Part L; Ch. Mesozoic Ammonoidea.. Geological Soc. of America and Uni. Kansas Press, R.C Moore (ed)
Early Jurassic ammonites of Europe
Liparoceratidae
Animal subgenera
{{Ammonitina-stub