lethonemus, Hymenocephalus Jordan [D. S.] & Gilbert [C. H.] in Jordan & Starks 1904:615, Fig. [Bulletin of the U. S. Fish Commission v. 22 [1902]; ref. 2526] Sagami Bay, Japan, depth 120-265 fathoms [219-485 meters]. Holotype: USNM 50936. Paratypes: CAS-SU 8641 (3), USNM 51455 (3). Type catalog: Böhlke 1953:58 [ref. 12291]. Types: Shinohara & Williams 2006:551 [ref. 31656]. •Valid as Hymenocephalus lethonemus Jordan & Gilbert 1904 -- (Yatou in Okamura et al. 1982:145, 347 [ref. 8256], Okamura in Masuda et al. 1984:94 [ref. 6441], Okamura in Okamura & Kitajima 1984:201, 358 [ref. 8057], Iwamoto in Cohen et al. 1990:230 [ref. 18936], Shinohara et al. 1996:169 [ref. 26605], Nakabo 2000:419 [ref. 25086], Shinohara et al. 2001:305 [ref. 25995], Nakabo 2002:419 [ref. 26001], Chiou et al. 2004:44 [ref. 27691], Shinohara et al. 2005:417 [ref. 28370], Motomura et al. 2010:77 [ref. 31256], Schwarzhans 2014:42 [ref. 33586], Nakayama et al. 2015:504? [ref. 33724], Iwamoto et al. 2015:75 [ref. 35408], Nakayama 2020:210 [ref. 37888]). Current status: Valid as Hymenocephalus lethonemus Jordan & Gilbert 1904. Macrouridae. Distribution: Western North Pacific: Japan, Ryukyu Islands and Taiwan. Habitat: marine.