Fig. 56 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Fig. 56. Costimitoceras ornatum Vöhringer, 1960 from the Oberrödinghausen railway cutting. A. Cross section of paratype GPIT-PV-63922 from bed 3e. B. Suture line of holotype GPIT-PV-63918 from bed 3e, at ww = 7.7 mm, wh = 8.5 mm. C. Growth line course of paratype GPIT-PV-63920 from bed 3d, at dm = 10.5 mm, ww = 5.5 mm, wh = 5.5 mm. D. Growth line course of holotype GPIT-PV-63918 from bed 3e, at dm = 28.0 mm, ww = 11.5 mm, wh = 15.5 mm. E–G. 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.