Fig. 18 in The early gephuroceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 18. Koenenites lamellosus (Sandberger & Sandberger, 1851). A. Cross section of specimen MB.C.22201 from Oberscheld (Königszug Mine). B. Suture line of specimen MB.C.22184 (Koch Coll.) from Oberscheld (Anna Mine), at dm = 29.0 mm, ww = 7.4 mm, wh = 11.1 mm. C–F. Ontogenetic trajectories of the cardinal conch parameters. Scale bar units = 1 mm.