nigrimanus, Ariosoma Norman [J. R.] 1939:39, Fig. 12 [Scientific Reports, John Murray Expedition v. 7 (no. 1); ref. 6556] Gulf of Aden, station 194, depth 220 meters. Holotype: BMNH 1939.5.24.621-622 (300-mm spec.). Paratypes: BMNH 1939.5.24.621-623 (1 of 2). The species epithet is a noun in apposition, and does not change its ending. •Valid as Ariosoma nigrimanum Norman 1939 -- (Manilo & Bogorodsky 2003:S95 [ref. 27377], Smith & Heemstra 2022:88 [ref. 39685]). •Valid as Ariosoma nigrimanus Norman 1939 -- (Smith 1989:495 [ref. 13285]). Current status: Valid as Ariosoma nigrimanus Norman 1939. Congridae: Bathymyrinae. Distribution: Western Indian Ocean: Mozambique; Gulf of Aden. Habitat: marine.