iwasakii, Abudefduf Okada [Y.] & Ikeda [H.] 1939:170, Fig. 7 [Transactions Biogeogaphical Society of Japan v. 3 (no. 2); ref. 17212] Isigaki Island, Yaeyama Islands, southern Ryukyu Islands, Japan. Holotype (unique): Okada coll. spec. 2589 (lost). Type information: Hayashi 1995:7 [ref. 22717]. •Synonym of Plectroglyphidodon imparipennis (Vaillant & Sauvage 1875) -- (Allen 1991:248 [ref. 19344], Parenti 2021:71 [ref. 38418]). Current status: Synonym of Plectroglyphidodon imparipennis (Vaillant & Sauvage 1875). Pomacentridae: Microspathodontinae. Habitat: marine.