Fig. 63 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Fig. 63. Nicimitoceras heterolobatum (Vöhringer, 1960) from the Oberrödinghausen railway cutting (widely umbilicate morphotype). A. Cross section of paratype GPIT-PV-63897 from bed 3e. B. Cross section of paratype GPIT-PV-63977 from bed 3c. C. Cross section of specimen MB.C.31139.1 from bed 3d. D. Cross section of specimen MB.C.31135.1 from bed 2. E. Suture line of specimen MB.C.31139.1 from bed 3d, at ww = 7.3 mm, wh = 8.1 mm. F. Suture line of holotype GPIT-PV-63893 from bed 3b/c, at dm = 36.7 mm, ww = 16.0 mm, wh = 22.5 mm. G–I. 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.