subnigrum, Hypnos Duméril [A. H. A.] 1852:279, Pl. 12 [Revue et Magasin de Zoologie (Sér. 2) v. 4; ref. 1148] Sydney, New South Wales, Australia. Syntypes: MNHN 0000-1230 (2, poor condition). Type catalog: Bertin 1939:82 [ref. 20739], Séret & McEachran 1987:27-28 [ref. 9312]. •Synonym of Hypnos monopterygium (Shaw 1795) -- (Paxton et al. 1989:60 [ref. 12442], Gomon et al. 1994:155 [ref. 22532], Last & Stevens 1994:373 [ref. 23873], Compagno & Last 1999:1447 [ref. 24637] as monopterygius, Paxton et al. 2006:165 [ref. 28995]). Current status: Synonym of Hypnos monopterygius (Shaw 1795). Hypnidae. Habitat: marine.