sinus, Apogon Randall [J. E.] 2001:58, Fig. 4 [Pacific Science v. 55 (no. 1); ref. 25215] Hiva Oa, head of Tahauka Bay on western side, Marquesas Islands, depth 0-1 meters. Holotype: BPBM 12117. Paratypes: AMS I.39938-001 (2); ANSP 177850 (2); BPBM 10356 (2), 12811 (1), 38692 (9); CAS 211006 (2); FMNH 108659 (2); MNHN 2000-191 (2); NSMT-P 59102 (2); USNM 359801 (2). •Valid as Apogon sinus Randall 2001 -- (Fraser & Randall 2003:5 [ref. 26789]). •Valid as Ostorhinchus sinus (Randall 2001) -- (Randall 2005:209 [ref. 28239], Mabuchi et al. 2014:201 [ref. 33426], Delrieu-Trottin et al. 2015:6 [ref. 33988], Kuiter & Kozawa 2019:122 [ref. 36965]). Current status: Valid as Ostorhinchus sinus (Randall 2001). Apogonidae: Apogoninae. Distribution: Southern-central Pacific: Marquesas Islands. Habitat: marine.