longiceps, Monomitopus Smith [H. M.] & Radcliffe [L.] in Radcliffe 1913:149, Pl. 9 (fig. 2) [Proceedings of the United States National Museum v. 44 (no. 1948); ref. 3579] China Sea south of Hong Kong, 20°05'00"N, 116°05'00"E, Albatross station 5299, depth 524 fathoms. Holotype (unique): USNM 74134. •Valid as Monomitopus longiceps Smith & Radcliffe 1913 -- (Carter & Cohen 1985:87 [ref. 5145], Nielsen & Cohen in Nielsen et al. 1999:78 [ref. 24448], Nielsen 1999:1981 [ref. 24753], Nielsen in Randall & Lim 2000:596 [ref. 25122], Girard & Johnson 2024:6 [ref. 41368]). Current status: Valid as Monomitopus longiceps Smith & Radcliffe 1913. Ophidiidae: Neobythitinae. Distribution: Eastern Indian Ocean, western Pacific: Java (Indonesia); Hong Kong (China). IUCN (2020): Data Deficient. Habitat: marine.