Gatunek typowy
Goniatites (Beyrichoceras) circumplicatile Foord, 1903

Opis

Conch of variable shape with wide or moderately wide umbilicus; small rather strong ribs near umbilicus; umbilical nodes at early whorls; coarse ornament rather average for the family but fine ornament with striae fairly widely spaced; adventitious lobe wider than ventral lobe; apertural form less sinuosity than most reticuloceratids; suture with particularly small median saddle; lobes simple.

Synonimy

Zasięg czasowy

Carboniferous, Bashkirian-Moscovian.

Literatura

Ruzhencev, V. E., Bogoslovskaya, M. F. 1975. O semeystve Reticuloceratidae i rodstavennykh taksonakh. Paleontological Journal 1975 (1): 46–61.