Rodzaj Prionoceras Hyatt, 1884
Gatunek typowy Opis Minute more or less globose conch with closed umbilicus at all stages; internal shell thickenings correspond to external constrictions, expressed mostly on the conch flanks and are regularly distributed, usually three per whorl. Synonimy Zasięg czasowy Late Famennian and Tournaisian. Literatura Dzik, J. 1997. Emergence and succession of Carboniferous conodont and ammonoid communities in the Polish part of the Variscan sea. Acta Palaeontologica Polonica 42, 57-170. Dzik, J. 2006. The Famennian "Golden Age" of conodonts and ammonoids in the Polish part of the Variscan sea. Palaeontologia Polonica 63, 1-359. |
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