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Rodzaj Cravenoceratoides
Gatunek typowy Opis Shell subglobular to subdiscoidal, moderately evolute to involute; sculpture consisting of almost radial transverse striae dichotomizing somewhat irregularly at or close to the umbilical shoulder; ventral lobe relatively wide, with diveriging sides. Synonimy Zasięg czasowy Early Carboniferous to Late Carboniferous (Pendleian to Chokierian). Literatura Hudson, R.G.S. 1941. The Mirk Fell Beds (Namurian, E2) of Tan Hill, Yorkshire. Proceedings of the Yorkshire Geological Society 24: 259-289. |
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