Species that contain: Hymenocephalus and longibarbis [ 2 ] records

longibarbis, Macrurus Günther [A.] 1887:139, Pl. 18 (fig. C) [Report on the Scientific Results of the Voyage of H. M. S. Challenger v. 22 (pt 57); ref. 2013] Off Matuku, Fiji Islands, Challenger station 173, depth 315 fathoms. Holotype (unique): BMNH 1887.12.7.94. Original genus should have been Macrourus. •Valid as Hymenocephalus longibarbis (Günther 1887) -- (Yatou in Okamura et al. 1982:141, 346 [ref. 8256], Paxton et al. 1989:327 [ref. 12442], Iwamoto in Cohen et al. 1990:230 [ref. 18936], Iwamoto & Merrett 1997:520 [ref. 23710], Iwamoto & Williams 1999:177 [ref. 23875], Iwamoto 1999:1991 [ref. 24761], Merrett & Iwamoto 2000:757 [ref. 25037], Iwamoto & Graham 2001:474 [ref. 25637], Hutchins 2001:24 [ref. 25847], Bray et al. 2006:596 [ref. 29065], Iwamoto & McMillan 2008:338 [ref. 30636], Fricke et al. 2011:364 [ref. 31242], Iwamoto et al. 2011:515 [ref. 31434], Schwarzhans 2014:27 [ref. 33586], Nakayama et al. 2015:504? [ref. 33724], Williams et al. 2018:99 [ref. 36359], Nakayama 2020:213 [ref. 37888]). Current status: Valid as Hymenocephalus longibarbis (Günther 1887). Macrouridae. Distribution: Southeastern Indian Ocean, western Pacific: Japan to Australia. Habitat: marine.

longiceps, Hymenocephalus Smith [H. M.] & Radcliffe [L.] in Radcliffe 1912:111, Pl. 23 (fig. 3) [Proceedings of the United States National Museum v. 43 (no. 1924); ref. 3578] Off southeastern Luzon Island, 13°10'21"N, 123°59'54"E, Philippines, Albatross station 5459, depth 201 fathoms. Holotype: USNM 72928. Paratypes: USNM 149297 (2). First author is H. M. Smith. •Valid as Hymenocephalus longiceps Smith & Radcliffe 1912 -- (Yatou in Okamura et al. 1982:141, 346 [ref. 8256], Okamura in Masuda et al. 1984:93 [ref. 6441], Okamura in Okamura & Kitajima 1984:199, 357 [ref. 8057], Paxton et al. 1989:327 [ref. 12442], Iwamoto in Cohen et al. 1990:230 [ref. 18936], Iwamoto & Williams 1999:177 [ref. 23875], Nakabo 2000:419 [ref. 25086], Iwamoto in Randall & Lim 2000:595 [ref. 25122], Hutchins 2001:24 [ref. 25847], Shinohara et al. 2001:305 [ref. 25995], Nakabo 2002:419 [ref. 26001], Shinohara et al. 2005:417 [ref. 28370], Motomura et al. 2015:16 [ref. 34709], Iwamoto et al. 2015:75 [ref. 35408]). •Synonym of Hymenocephalus longibarbis (Günther 1887) -- (Schwarzhans 2014:27 [ref. 33586], Nakayama 2020:215 [ref. 37888]). Current status: Synonym of Hymenocephalus longibarbis (Günther 1887). Macrouridae. Habitat: marine.