Fig. 5. A–E. Morphotype 9. A. P2−LV, arrows indicate pd−outlet, BGR X10868−7; A1, entire valve, × 175; A2, close up of dorsal−posterior segment with pd−outlet, × 500; A3, close up of the two rows of gear wheel type, secondary denticles, typical of the LV, × 1250. B. P2, external; note that the valve was mounted before the significance of the pd−outlet was known; left or right cannot be established, therefore, BGR X10865−7, × 175. C. P2−RV, arrows indicate pd−outlet, BGR X10868−1; C1, entire valve, × 175; C2, close up of "gothic window frame" secondary denticles, × 1250. D. Articulated P2 valves viewed from back, left and right cannot be distinguished, BGR X10868−5, × 175. E. P2−RV, arrow indicates pd−outlet, BGR X10865−5; E1, close up of posterior valve margin, × 500; E2, entire valve from back, × 175. F. Pinnid (?Atrina sp.), recent, Mediterranean, P2−RV, BGR X10848−8; F1, close up of posterior valve margin, note interruption (black arrows) of interlocking margin type, × 400; F2, entire valve, arrow shows postion of pd−outlet, × 100; F3, close up of hinge, arrow indicates detached position of resilium, growing anteriorly, × 400.