Gatunek typowy
Eumorphoceras plummeri Miller et Youngquist, 1948

Opis

Shell flat disc-shaped with a sharpened external side, umbilicus very narrow; ornamentation of fine, biconvex and rectiradiat growth strips; shell constrictions occurring regularly in middle stages, first concave-convex and prorsidiate, later biconvex and rectiradiate; fine umbilical ribs when young, some species are also ribbed in the middle stage; in middle stages simple or double ventrolateral longitudinal furrow, umbilical edge protruding like a wreath; suture with a broad external lobe, the flanks of which diverge sharply; median saddle of medium height, ventrolateral saddle narrowly rounded; adventitious lobe V-shaped with barely curved flanks.

Synonimy
Eumorphoceras (Edmooroceras) Elias, 1956

Zasięg czasowy

Carboniferous; Serpukhovian

Literatura

Elias, M.K. 1956. Upper Mississippian and Lower Pennsylvanian Formations of south-central Oklahoma. In: Petroleum geology of southern Oklahoma. Volume 1. American Association of  Petroleum Geologists 1956: 56-13.

Korn, D. 1988. Die Goniatiten des Kulmplattenkalkes (Cephalopoda, Ammonoidea; Unterkarbon; Rheinisches Schiefergebirge). Geologie und Paläontologie in Westfalen 11: 1–293.