Hymenocephalus Giglioli [E. H.] 1884:228 Masc. Hymenocephalus italicus Giglioli 1884. Type by original designation (also monotypic). Species appeared first as Malacocephalus laevis [Lowe] in Giglioli 1882:535 [ref. 1618] without description, to which name Hymenocephalus italicus was applied by Giglioli (1883:199 [ref. 1620]) without description. Available as above. •Valid as Hymenocephalus Giglioli 1884 -- (Marshall 1973:289 [ref. 7194], Marshall & Iwamoto 1973:601 [ref. 6966], Iwamoto 1979:140 [ref. 2311], Fahay & Markle 1984:274 [ref. 13653], Okamura in Masuda et al. 1984:93 [ref. 6441], Paxton et al. 1989:327 [ref. 12442], Iwamoto in Cohen et al. 1990:224 [ref. 18936], Gomon et al. 1994:357 [ref. 22532], Iwamoto & Merrett 1997:514 [ref. 23710], Iwamoto & Williams 1999:175 [ref. 23875], Iwamoto 1999:1988 [ref. 24761], Merrett & Iwamoto 2000:757 [ref. 25037], Iwamoto 2003:979 [ref. 27010], Chiou et al. 2004:44 [ref. 27691], Bray et al. 2006:595 [ref. 29065], Iwamoto & McMillan 2008:338 [ref. 30636], Lipej & Dulčić 2010:28 [ref. 36649], Iwamoto et al. 2011:513 [ref. 31434], Sobrino et al. 2012:696 [ref. 32478], McMillan & Iwamoto 2014:118 [ref. 33462], Schwarzhans 2014:26 [ref. 33586], Nakayama et al. 2015:504 [ref. 33724], McMillan & Iwamoto 2015:804 [ref. 34263], Iwamoto et al. 2015:73 [ref. 35408], Bañón et al. 2016:313 [ref. 34397], Fricke et al. 2019:69 [ref. 36673], Nakayama 2020:207 [ref. 37888]). Current status: Valid as Hymenocephalus Giglioli 1884. Macrouridae.