Fig. 102 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Fig. 102. Hasselbachia erronea sp. nov., from the Oberrödinghausen railway cutting. A. Cross section of paratype GPIT-PV-63927 (Vöhringer Coll.) from bed 5. B. Growth line and constriction course of holotype MB.C.31198 (Weyer 1993–1994 Coll.) from bed 3e, at dm = 16.0 mm, ww = 12.2 mm, wh = 7.3 mm. C. Suture line of paratype GPIT-PV-63927 from bed 5, at dm = 16.0 mm, ww = 12.0 mm, wh = 7.6 mm. D –F. 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.