Gatunek typowy
Goniatites subcircularis Miller, 1889

Opis

Conch discoidal with wide umbilicus in young and very narrow to narrow, tubular in adult; ornamentation of 30-50 strong spiral stripes and fine convex-concave and prorsiradiate growth stripes; suture with external lobe of medium width, flanks distinctly diverging; median saddle low, ventrolateral saddle broadly rounded; symmetrical adventitious lobe with barely curved flanks.

Synonimy

Zasięg czasowy

Carboniferous, Serpukhovian

Literatura

Ruzhencev, V.E. & Bogoslovskaya, M.F. 1978. Namyurskiy etap v evolyutsii ammonodey. Pozdnenamyurskiye ammonoidei. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR 167: 1-336.