Figure 5. 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 5. Paphies elongata. A more detailed view of the hinge plate of the right valve showing the structure of the ligament. ACT, anterior cardinal tooth; ALT, anterior lateral tooth; AOLL, anterior outer ligament layer; ILL, inner ligament layer; P, periostracum; PCT, posterior cardinal tooth; PLT?, possible posterior lateral tooth; POLL, posterior outer ligament layer; PR, prodissoconch; RE, resilifer; S, socket.