monodactylus, Eustomias Regan [C. T.] & Trewavas [E.] 1930:107, Pl. 9 (fig. 4); Fig. 101-102 [Danish Dana Expedition 1920-22 in the North Atlantic and the Gulf of Panama, Oceanographical Reports. v. 2 (no. 6); ref. 3681] North Atlantic. Syntypes: BMNH 1929.7.6.133 (1) Dana station 1166 (10°16'N, 40°41'W); ZMUC P201972 (1) Dana station 1158 (19°22'N, 24°06'W). Type catalog: Nielsen 1974:17 [ref. 9588]. •Synonym of Eustomias filifer (Gilchrist 1906) -- (Gibbs & Barnett 1990:317 [ref. 14915]). •Valid as Eustomias monodactylus Regan & Trewavas 1930 -- (Sutton & Hartel 2004:117 [ref. 27508], Carneiro et al. 2019:99 [ref. 37250], Page et al. 2023:88 [ref. 40505]). Current status: Valid as Eustomias monodactylus Regan & Trewavas 1930. Stomiidae: Melanostomiinae. Distribution: North Atlantic. Habitat: marine.