Beaniceras is small, coarsely ribbed subgenus of ammonites from the Lower Jurassic 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)