Figure 17 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 17. Paphies elongata. The organs of the pericardium as seen from the right side. AN, anus; AU, auricle; CA, ctenidial axis; DD, digestive diverticulae; G, gonad; GA, gonadial aperture; K, kidney; PA, posterior adductor muscle; PALID, point of attachment of the ascending lamella of the inner demibranch to the visceral mass; PALOD, point of attachment of the ascending lamella of the outer demibranch to the mantle; PG, pericardial gland; PPR, posterior pedal retractor muscle; PR, prodissoconch; R, rectum; RA, renal aperture; R-PA, reno-pericardial aperture; V, ventricle; VM, visceral mass.