nigeli, Monognathus Bertelsen [E.] & Nielsen [J. G.] 1987:178, Fig. 22 [Steenstrupia v. 13 (no. 4); ref. 6618] Northeastern Atlantic, 31°19.4'N, 25°10.8'W, depth 3110-3500 meters (over bottom depth of 5400 meters). Holotype: BMNH 1987.2.3.3. Paratypes: BMNH 1987.2.3.6 (1), ZMUC P2340540 (1). •Valid as Monognathus nigeli Bertelsen & Nielsen 1987 -- (Bertelsen et al. 1989:654 [ref. 13293], Smith 2003:763 [ref. 26989], Smith 2016:1714 [ref. 34556], Carneiro et al. 2019:70 [ref. 37250]). Current status: Valid as Monognathus nigeli Bertelsen & Nielsen 1987. Monognathidae. Distribution: Northeastern Atlantic. Habitat: marine.