Figure 10. 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 10. Paphies elongata. A more detailed view of the ciliary currents of the ctenidium and the ctenidial-labial palp junction, as seen from the right side. AA(1), anterior adductor muscle(1); APR, anterior pedal retractor muscle; CA, ctenidial axis; ID, inner demibranch; ILP, inner labial palp; M, mouth; OD, outer demibranch; OLP, outer labial palp; PA, posterior adductor muscle; PALOD, point of attachment of the ascending lamella of the outer demibranch to the mantle; PPR, posterior pedal retractor muscle; SAE, supra-axial extension of the outer demibranch; VM, visceral mass; VMFG, ventral margin food groove of the inner demibranch.