Hymenocephalus is a genus of rattails.
Species There are currently 27 recognized species in this genus: Hymenocephalus aeger C. H. Gilbert & C. L. Hubbs, 1920 (Plain-tail whiptail) Hymenocephalus antraeus C. H. Gilbert & Cramer, 1897 Hymenocephalus aterrimus C. H. Gilbert, 1905 (Blackest whiptail) Hymenocephalus barbatulus C. H. Gilbert & C. L. Hubbs, 1920 Hymenocephalus billsam N. B. Marshall & Iwamoto, 1973 Hymenocephalus fuscus P. J. McMillan & Iwamoto, 2014 (Black membranehead) McMillan, P. & Iwamoto, T. (2014): Descriptions of four species of grenadier fishes of the genera Hymenocephalus and Hymenogadus (Teleostei, Gadiformes, Macrouridae) from the New Zealand region and Tasman Sea, including two new species of Hymenocephalus. Zootaxa, 3856 (1): 117–134. Hymenocephalus grimaldii M. C. W. Weber, 1913 Hymenocephalus hachijoensis Okamura, 1970 Hymenocephalus heterolepis (Alcock, 1889) Hymenocephalus italicus Giglioli, 1884 (Glass-head grenadier) Hymenocephalus iwamotoi Schwarzhans, 2014 (Iwamoto's whiptail) Schwarzhans, W. (2014): Head and otolith morphology of the genera Hymenocephalus, Hymenogadus and Spicomacrurus (Macrouridae), with the description of three new species. Zootaxa, 3888 (1): 1–73. Hymenocephalus lethonemus D. S. Jordan & C. H. Gilbert, 1904 Hymenocephalus longibarbis (Günther, 1887) (Long-barb whiptail) Hymenocephalus longipes H. M. Smith & Radcliffe, 1912 Hymenocephalus maculicaudus P. J. McMillan & Iwamoto, 2014 (Spotty-tail membranehead) Hymenocephalus megalops Iwamoto & Merrett, 1997 (Big-eye whiptail) Hymenocephalus nascens C. H. Gilbert & C. L. Hubbs, 1920 (Nascent membranehead) Hymenocephalus neglectissimus Sazonov & Iwamoto, 1992 Hymenocephalus nesaeae Merrett & Iwamoto, 2000 Hymenocephalus papyraceus D. S. Jordan & C. H. Gilbert, 1904 Hymenocephalus punt Schwarzhans, 2014 Hymenocephalus sazonovi Schwarzhans, 2014 Hymenocephalus semipellucidus Sazonov & Iwamoto, 1992 Hymenocephalus striatissimus D. S. Jordan & C. H. Gilbert, 1904 Hymenocephalus striatulus C. H. Gilbert, 1905 Hymenocephalus torvus H. M. Smith & Radcliffe, 1912 Hymenocephalus yamasakiorum Nakayama, Endo & Schwarzhans, 2015 (Black-tailed membranehead) Nakayama, N., Endo, H. & Schwarzhans, W. (2015): A new grenadier of the genus Hymenocephalus from Tosa Bay, southern Japan (Actinopterygii: Gadiformes: Macrouridae). Ichthyological Research, 62 (4): 504-511.
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