Fig. 8 in Size-shape relationships in the Mesozoic planispiral ammonites

Fig. 8. ADA−model simulated ammonites (as explained in text) showing the distribution of morphotypes in the reduced morphologic space RM1. All ammonites are scaled to nearly equal size. Extreme morphotypes (out of the constrained morphospace CM1, see Fig. 5A) not known within the Mesozoic Ammonoidea are shown side−by−side with known morphotypes for comparison. Bold broken line is the main trend H2 = 0.3D.