Rodzaj Cheiloceras

Gatunek typowy
Goniatites subpartitus Münster, 1839 from the early Famennian of Franconia.

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. — The concept of the genus has been extensively discused by Becker  who applied much importance to evolute early whorls of the type species and 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.

Specyfikacja

Królestwo
ANIMALIA 

Typ
MOLLUSCA

Podtyp
CONCHIFERA

Gromada
CEPHALOPODA

Podgromada
AMMONOIDEA

Rząd
Goniatitida

Podrząd
Tornoceratina

Rodzina
Cheiloceratidae

Rodzaj
Cheiloceras


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Created by Jerzy Dzik on 2015/07/13 12:18

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