Figure 11 in Phylogeny of cardiid bivalves (cockles and giant clams): revision of the Cardiinae and the importance of fossils in explaining disjunct biogeographical distributions

Figure 11. Internal views of right valves. A, Cardium costatum (ANSP 54110). Note strong internal expression of radial ribs, absence of impression of adductor muscle scars. Scale bar = 10 mm. B, Plagiocardium granulosum (ANSP 6268). Scale in cm indicated in figure. C, Orthocardium porulosum (ANSP 6266). Scale bar = 10 mm. In B and C, radial ribs expressed internally only at shell margin; adductor muscle scars impressed. Only anterior adductor muscle scar labelled; posterior adductor muscle scar equally well-impressed into shell, but not readily visible in these views due to foreshortening.