usitatus, Synodus Cressey [R. F.] 1981:42, Fig. 35 [Smithsonian Contributions to Zoology No. 342; ref. 5574] Off Haleiwa, Oahu Island, Hawaiian Islands, depth 100 meters (55 fathoms). Holotype: BPBM 15484. Paratypes: BPBM 26544 (1), FAKU 5780 (1, not present in 1997), USNM 225068 (1). •Valid as Synodus usitatus Cressey 1981 -- (Waples & Randall 1989:201 [ref. 9187], Nakabo 2000:357 [ref. 25086], Nakabo 2002:357 [ref. 26001], Mundy 2005:202 [ref. 28379], Randall 2007:113 [ref. 30952], Ho et al. 2010:63 [ref. 30761], Gloerfelt-Tarp & Kailola 2022:75 [ref. 41223], Russell 2022:220 [ref. 39701], Furuhashi & Motomura 2025:8 [ref. 42144]). Current status: Valid as Synodus usitatus Cressey 1981. Synodontidae: Synodontinae. Distribution: Central Pacific: Hawaiian Islands (U.S.A.), endemic. Habitat: marine.