nigrocastaneus, Gymnothorax Cope [E. D.] 1871:483 [Transactions of the American Philosophical Society (New Series) v. 14 (pt 3) (art. 5); ref. 920] St. Martin Island, West Indies. Holotype (unique): ANSP 16032. Type catalog: Böhlke 1984:130 [ref. 13621]. •Synonym of Enchelycore nigricans (Bonnaterre 1788) -- (Böhlke et al. 1989:143 [ref. 13286], Smith & Böhlke 1990:140 [ref. 19379], Smith 2012:8 [ref. 32155]). Current status: Synonym of Enchelycore nigricans (Bonnaterre 1788). Muraenidae: Muraeninae. Habitat: marine.