Fig. 10 in Braincase Of The Upper Devonian Shark Cladodoides Wildungensis (Chondrichthyes, Elasmobranchii With Observations On The Braincase In Early Chondrichthyans

Fig. 10. The extent of the polar cartilage­derived region (gray area) in neoselachians. (A) Squalus 50­mm stage, lateral view; (B) Scyliorhinus 36­mm stage, lateral view; (C, D) Heterodontus 62­mm stage, lateral (C) and medial (D) views. Panels A and B are after De Beer 1931; panels C and D are after Holmgren 1941.