Rodzaj Ammonellipsites Parkinson, 1822
Gatunek typowy Opis May be junior synonym of Pericyclus. Conch thickly subdiscoidal with wide umbilicus and prominent undivided ribs parallel to constrictions. Synonimy Zasięg czasowy Carboniferous; Late Mississippian Literatura Parkinson, J. 1822. Introduction to the study of fossil organic remains. I-VII, 1-346, pl.1-10; London. |
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