gracilis, Hymenocephalus Gilbert [C. H.] & Hubbs [C. L.] 1920:522, Fig. 31 [Bulletin of the United States National Museum No. 100, v. 1 (pt 7); ref. 1638] Off southern Luzon Island, Philippines, 13°28'45"N, 121°01'12"E, Albatross station 5292, depth 162 fathoms. Holotype (unique): USNM 78227. •Valid as Hymenocephalus gracilis Gilbert & Hubbs 1920 -- (Geistdoerfer in Whitehead et al. 1986:663 [ref. 13676], Iwamoto in Cohen et al. 1990:230 [ref. 18936], Anderson 1997:231 [ref. 22910], Pequeño 1997:82 [ref. 23536], Iwamoto & Merrett 1997:518 [ref. 23710], Uiblein et al. 1999:62 [ref. 24045], Iwamoto 1999:1991 [ref. 24761], Merrett & Iwamoto 2000:757 [ref. 25037], Shinohara et al. 2001:305 [ref. 25995], Iwamoto 2003:987 [ref. 27010], Chiou et al. 2004:44 [ref. 27691], Bray et al. 2006:595 [ref. 29065], Fricke et al. 2011:364 [ref. 31242]). •Valid as Hymenogadus gracilis (Gilbert & Hubbs 1920) -- (Okamura in Masuda et al. 1984:94 [ref. 6441], Okamura in Okamura & Kitajima 1984:201, 359 [ref. 8057], Nakabo 2000:418 [ref. 25086], Nakabo 2002:418 [ref. 26001], Shinohara et al. 2005:418 [ref. 28370], McMillan & Iwamoto 2014:129 [ref. 33462], Schwarzhans 2014:23 [ref. 33586], Lins Oliveira et al. 2015:92 [ref. 37485], McMillan & Iwamoto 2015:807 [ref. 34263], Iwamoto et al. 2015:78 [ref. 35408], Iwamoto 2016:1980 [ref. 34585], Carneiro et al. 2019:135 [ref. 37250], Nakayama 2020:223 [ref. 37888], Page et al. 2023:101 [ref. 40505]). Current status: Valid as Hymenogadus gracilis (Gilbert & Hubbs 1920). Macrouridae. Distribution: Circumglobal, including Mediterranean Sea. Habitat: marine.