Figure 8. Paphies elongata. A in The biology and functional morphology of the high-energy beach dwelling Paphies elongata (Bivalvia: Mactroidea: Mesodesmatidae). Convergence with the surf clams (Donax: Tellinoidea: Donacidae)

Figure 8. Paphies elongata. A transverse section through the fused ventral mantle margin posterior to the pedal gape. FIMF(2), fused inner mantle folds (outer component); FRT, fused rejectory tracts; IMF(1), inner mantle fold (inner component); MMF, middle mantle fold; OMF, outer mantle fold; P, periostracum; PRM, pallial retractor muscle; SC, secretory cells; TC, transverse connective.