Species that contain: Xenoceratias and nudus [ 1 ] records

nudus, Xenoceratias Beebe [W.] & Crane [J.] 1947:155, Fig. 2 [Zoologica, Scientific Contributions of the New York Zoological Society v. 31 (pt 4, no. 11); ref. 6539] 20 miles south of Cape Blanco, Costa Rica, 9°12'N, 85°10'W, depth 500 fathoms (915 meters). Holotype (unique): CAS-SU 46495 [ex NYZS 28402]. Type catalog: Mead 1958:134 [ref. 20648]. •Uncertain status in Melanocetus -- (Pietsch 2009:368 [ref. 30766]). Nomen Dubium. Melanocetidae. Habitat: marine.