Fig. 12 in Taxonomy and ontogeny of the Lituitida (Cephalopoda) from Orthoceratite Limestone erratics (Middle Ordovician)

Fig. 12. Rhynchorthoceras angelini (Boll, 1857) from the Upper Red Orthoceratite Limestone. A. Lirae of specimen MB.C.11725.1 (Remelé 1879 Coll.) from Heegermühle (Brandenburg), at wh = 14 mm. B–C. Ontogenetic development of lirae distance (in mm) and lirae distance/whorl height of specimen MB.C.11724 (Kgl. Forstakademie Eberswalde Coll.) from Heegermühle (Brandenburg). Blue dots = individual measurements, black lines = three data point averaged values. Scale bar units = 1 mm.