Apionsoma (Edmondsius) pectinatum (Keferstein, 1867): 47–48,

as Phascolosoma pectinatum; type locality: Pacific of Panama. — Fisher, 1952: 386–388, pl. 22, as Siphonides rickettsi (Point Lobos, Espíritu Santo Island, Baja California Sur, Mexico). — Brusca 1980: 127, as Phascolosoma rickettsi (Gulf of California, Mexico). — Dean 2001: 88 (Herradura Bay, Gulf of Nicoya and Gulf of Papagayo, Costa Rica, in rocks).