gracilicauda, Gigantactis Regan [C. T.] 1925:565 [Annals and Magazine of Natural History (Series 9) v. 15 (no. 91); ref. 3677] Atlantic, 13°46' [or 47']N, 61°26'W, Dana Station 1183, depth about 2250 meters (4500 meters wire out). Holotype (unique): ZMUC P92129. Type catalog: Nielsen 1974:98 [ref. 9588]. Males unknown. •Valid as Gigantactis gracilicauda Regan 1925 -- (Bertelsen et al. 1981:38 [ref. 5330], Bertelsen 1990:513 [ref. 15724], Pietsch 2003:1068 [ref. 27014], Pietsch 2009:462 [ref. 30766], Kharin 2011:663 [ref. 31582], Pietsch 2016:2074 [ref. 34597], Page et al. 2023:167 [ref. 40505]). Current status: Valid as Gigantactis gracilicauda Regan 1925. Gigantactinidae. Distribution: Atlantic. Habitat: marine.