Alepocephalidae

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Slickheads or nakedheads are a family, Alepocephalidae, of osmeriform fishes. They are deep-water fishes most common below 1,000 m. They are native to the eastern Atlantic, western Indian and eastern and western Pacific Oceans. They get their name from the lack of scales on the head.

The scientific name is from Greek alepos meaning "lacking scales" and kephale meaning "head".

Species

There are about a hundred species in twenty genera:

• Genus Alepocephalus
• * Agassiz' slickhead, Alepocephalus agassizii Goode & Bean, 1883.

Agassiz' slickhead, Alepocephalus agassizii

• * Alepocephalus andersoni Fowler, 1934.
• * Alepocephalus antipodianus (Parrott, 1948).
• * Alepocephalus asperifrons Garman, 1899.
• * Small scaled brown slickhead, Alepocephalus australis Barnard, 1923.
• * Baird's smooth-head, Alepocephalus bairdii Goode & Bean, 1879.

Baird's smooth-head, Alepocephalus bairdii

• * Alepocephalus bicolor Alcock, 1891.
• * Alepocephalus blanfordii Alcock, 1892.
• * Alepocephalus dentifer Sazonov & Ivanov, 1979.
• * Alepocephalus fundulus Garman, 1899.
• * Alepocephalus longiceps Lloyd, 1909.
• * Alepocephalus longirostris Okamura & Kawanishi, 1984.
• * Alepocephalus melas de Buen, 1961.
• * Alepocephalus owstoni Tanaka, 1908.
• * Alepocephalus planifrons Sazonov, 1993.
• * Smalleye smooth-head, Alepocephalus productus Gill, 1883.

Smalleye smooth-head, Alepocephalus productus

• * Risso's smooth-head, Alepocephalus rostratus Risso, 1820.

Risso's smooth-head, Alepocephalus rostratus

• * California slickhead, Alepocephalus tenebrosus Gilbert, 1892.
• * Alepocephalus triangularis Okamura & Kawanishi, 1984.
• * Alepocephalus umbriceps Jordan & Thompson, 1914.
• Genus Asquamiceps
• * Asquamiceps caeruleus Markle, 1980.
• * Asquamiceps hjorti (Koefoed, 1927).
• * Asquamiceps longmani Fowler, 1934.
• * Fanfin smooth-head, Asquamiceps velaris Zugmayer, 1911.
• Genus Aulastomatomorpha
• * Aulastomatomorpha phospherops Alcock, 1890.
• Genus Bajacalifornia
• * Bajacalifornia aequatoris Miya & Markle, 1993.
• * Bajacalifornia arcylepis Markle & Krefft, 1985.
• * Sharpchin slickhead, Bajacalifornia burragei Townsend & Nichols, 1925.
• * Brown slickhead, Bajacalifornia calcarata (Weber, 1913).
• * Bajacalifornia erimoensis Amaoka & Abe, 1977.
• * Bigeye smooth-head, Bajacalifornia megalops (Lütken, 1898).
• * Bajacalifornia microstoma Sazonov, 1988.
• Genus Bathylaco
• * Bathylaco macrophthalmus Nielsen & Larsen, 1968.
• * Bathylaco nielseni Sazonov & Ivanov, 1980.
• * Black warrior, Bathylaco nigricans Goode & Bean, 1896.
• Genus Bathyprion
• * Fangtooth smooth-head, Bathyprion danae Marshall, 1966.
• Genus Bathytroctes
• * Bathytroctes breviceps Sazonov, 1999.
• * Bathytroctes elegans Sazonov & Ivanov, 1979.
• * Bathytroctes inspector Garman, 1899.
• * Bathytroctes macrognathus Sazonov, 1999.
• * Koefoed's smooth-head, Bathytroctes macrolepis (Koefoed, 1927).

Koefoed's smooth-head, Bathytroctes macrolepis

• * Michael Sars smooth-head, Bathytroctes michaelsarsi Koefoed, 1927.
• * Smallscale smooth-head, Bathytroctes microlepis (Lloyd, 1909).
• * Bathytroctes oligolepis (Krefft, 1970).
• * Bathytroctes pappenheimi (Fowler, 1934).
• * Bathytroctes squamosus Alcock, 1890.
• * Bathytroctes zugmayeri Fowler, 1974.
• Genus Binghamichthys
• * Binghamichthys aphos Bussing, 1965.
• Genus Conocara
• * Conocara bertelseni Sazonov, 2002.
• * Fiolenti's smooth-head, Conocara fiolenti Sazonov & Ivanov, 1979.
• * Conocara kreffti (Nielsen & Larsen, 1970).
• * Longfin smooth-head, Conocara macropterum (Vaillant, 1888).

Longfin smooth-head, Conocara macropterum

• * Elongate smooth-head, Conocara microlepis (Lloyd, 1909).
• * Murray's smooth-head, Conocara murrayi (Koefoed, 1927).
• * Conocara nigrum (Günther, 1878).

Conocara nigrum

• * Salmon smooth-head, Conocara salmoneum (Gill & Townsend, 1897).
• * Werner's smooth-head, Conocara werneri Nybelin, 1947.
• Genus Einara
• * Toothless smooth-head, Einara edentula (Alcock, 1892).
• * Loosescale smooth-head, Einara macrolepis (Koefoed, 1927).
• Genus Herwigia
• * Krefft's smooth-head, Herwigia kreffti (Nielsen & Larsen, 1970).
• Genus Leptoderma
• * Leptoderma affinis Alcock, 1899.
• * Leptoderma lubricum Abe, Marumo & Kawaguchi, 1965.
• * Grenadier smooth-head, Leptoderma macrops Vaillant, 1886.
• * Leptoderma retropinna Fowler, 1943.
• Genus Microphotolepis
• * Microphotolepis multipunctata Sazonov & Parin, 1977.
• * Microphotolepis schmidti (Angel & Verrier, 1931).
• Genus Mirognathus
• * Norman's smooth-head, Mirognathus normani Parr, 1951.
• Genus Narcetes
• * Narcetes erimelas Alcock, 1890.
• * Narcetes kamoharai Okamura, 1984.
• * Narcetes lloydi Fowler, 1934.
• * Blackhead salmon, Narcetes stomias (Gilbert, 1890).
• * Narcetes wonderi Herre, 1934.
• Genus Photostylus
• * Starry smooth-head, Photostylus pycnopterus Beebe, 1933.
• Genus Rinoctes
• * Abyssal smooth-head, Rinoctes nasutus (Koefoed, 1927).
• Genus Rouleina
• * Softskin smooth-head, Rouleina attrita (Vaillant, 1888).

Softskin smooth-head, Rouleina attrita

• * Rouleina danae (Marshall, 1966).
• * Rouleina eucla Whitley, 1940.
• * Rouleina euryops Sazonov, 1999.
• * Rouleina guentheri (Alcock, 1892).
• * Rouleina livida (Brauer, 1906).
• * Madeiran smooth-head, Rouleina maderensis Maul, 1948.
• * Rouleina nuda (Brauer, 1906).
• * Bluntsnout slickhead, Rouleina squamilatera (Alcock, 1898).
• * Rouleina watasei (Tanaka, 1909).
• Genus Talismania
• * Antillean smooth-head, Talismania antillarum (Goode & Bean, 1896).

Antillean smooth-head, Talismania antillarum

• * Threadfin slickhead, Talismania bifurcata (Parr, 1951).
• * Talismania brachycephala Sazonov, 1981.
• * Talismania bussingi Sazonov, 1989.
• * Talismania filamentosa Okamura & Kawanishi, 1984.
• * Hairfin smooth-head, Talismania homoptera (Vaillant, 1888).
• * Talismania kotlyari Sazonov & Ivanov, 1980.
• * Talismania longifilis (Brauer, 1902).
• * Threadfin smooth-head, Talismania mekistonema Sulak, 1975.
• * Talismania okinawensis Okamura & Kawanishi, 1984.
• Genus Xenodermichthys
• * Bluntsnout smooth-head, Xenodermichthys copei (Gill, 1884).

Bluntsnout smooth-head, Xenodermichthys copei

• * Xenodermichthys nodulosus Günther, 1878.

References

• ["Alepocephalidae"]. FishBase. Ed. Ranier Froese and Daniel Pauly. January 2006 version. N.p.: FishBase, 2006.
• Tony Ayling & Geoffrey Cox, Collins Guide to the Sea Fishes of New Zealand, (William Collins Publishers Ltd, Auckland, New Zealand 1982) ISBN 0-00-216987-8

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