FIGURE 12. A in Makoiamya cotterallae, a new genus and species of bivalve (Ceratomyidae) from the latest Triassic of New Zealand and New Caledonia

FIGURE 12. A. Restoration of RV of Makoiamya cotterallae, in internal view (based especially on Fig.10B, D, E, G, and J). B. Ceratomya aalensis (Quenstedt), Middle Jurassic, France; RV (upper) and LV internal views (from Cox 1969b). C. Unionites rectus (Gümbel), Upper Triassic, Tyrol; RV internal; U. muensteri Wissmann, Upper Triassic, Tyrol; RV external (from Cox 1969a). D. Dorsal view of generalised internal cast of LV of Ochotomya, showing, in negative relief, characteristic hinge features; a = low, broad groove, b = tooth-like projection, c = two shallow furrows (after Polubotko 1966, p.14). Scale bars demonstrate the length of each valve.