Photographs of selected species of the genus Atrina showing the external and internal surface of the right valve collected from northern Iloilo, Philippines. External valve (A.1, B.1, C.1, D.1, E.1), internal valve (A.2, B.2, C.2, D.2, E.2). Atrina pectinata (A.1–A.2), A. vexillum (B.1–B.2), A. inflata (C.1–C.2), A. seminuda (D.1–D.2), and A. rigida (E.1–E.2).