Fig. 118 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Fig. 118. Eocanites ruani (Bartzsch, Korn & Weyer, 2003) from the Oberrödinghausen railway cutting. A. Cross section of specimen GPIT-PV-63970 (Vöhringer Coll.) from bed 4 (after Vöhringer 1960). B. Growth line course of specimen MB.C.31229 (Weyer 1993–1994 Coll.) from bed 5a1, at ww = 9.7 mm, wh = 9.3 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.