Rodzaj Cheiloceras Frech, 1897
Gatunek typowy Opis Diagnosis. — Suture running transversely in ventral part of the whorl with pointed narrow flank lobe of various depth; transverse internal thickenings of the conch do not following the course of aperture; conch involute except for the earliest few whorls in advanced species. Remarks. — Some authorities exclude completely involute early species from the genus. Synonimy Zasięg czasowy Literatura 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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