Fig. 122 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Fig. 122. Eocanites brevis (Vöhringer, 1960) from the Oberrödinghausen railway cutting. A. Cross section of paratype GPIT-PV-63987 (Vöhringer Coll.) from bed 3c. B. Growth line course of holotype GPIT-PV-63985 (Vöhringer Coll.) from bed 3c, at dm = 17.6 mm, ww = 4.2 mm, wh = 5.0 mm. C–E. Ontogenetic development of the conch width index (ww/dm), umbilical width index (uw/ dm), whorl width index (ww/wh) and whorl expansion rate (WER) of selected specimens. Scale bar units = 1 mm.