Fig. 2. Morphotype 3. A. P2 in Early ontogeny of Jurassic bakevelliids and their bearing on bivalve evolution

Fig. 2. Morphotype 3. A. P2−RV, arrow indicates slight shell deflection in postero−dorsal margin, which corresponds to growth track of pd−outlet, BGR X10864−3, × 100. B, G. P2−RV, BGR X10864−5. B. Arrow indicates position of pd−outlet, × 100. G. Close up of posterior−dorsal shell margin with outlet, × 500. C. P2, articulated shell, RV on top, dorsal view, note equivalve condition, BGR X10861−3, × 100. D. P2−RV, BGR X10861−8, × 100. E. P2−LV, BGR X10849−8; E1, arrow indicates growth track and position of pd−outlet, × 100; E2, dorsal view, × 100; E3, close up of hinge area, arrow indicates leading edge of ligament, × 250. F. LV nepioconch with P2, BGR X10860−1. F1, dorsal view, position of ligament pits indicated (1−3), × 40; F2, ventral view of ligament area, 1st ligament pit broken, × 40; F, close up of P2, × 100. G. RV nepioconch with P2, BGR X10862−2. G, ventral view, × 40; G, dorsal view onto P2, × 40.