Squalus acanthias

angolThis moderately sized species is distinguished by the following set of characters: very slender body, abdomen width 7.2-9.2% TL; narrow head, width at mouth 7.9-10.2% TL; mouth width 1.7-2.2 times its horizontal prenarial length; moderately long snout, preoral length 2.2-2.5 times horizontal prenarial length, 8.5-9.8% TL; single-lobed anterior nasal flap; small dorsal fins, raked, first dorsal-fin height 1.1-1.3 times its inner margin length, second dorsal-fin height 0.7-0.9 times its inner margin length; origin of first dorsal-fin located just posterior to pectoral-fin free rear tips; exposed bases of dorsal-fin spines relatively narrow, 0.4-0.7% TL; short spine of first dorsal fin, exposed length 1.7-2.7% TL; pectoral-fin anterior margin 1.9-3.1 times its inner margin length; preventral caudal margin 1.9-2.6 times inner margin of pelvic fin; pale caudal fin with poorly demarcated, whitish margin, blackish caudal blotch at the apex of upper lobe, anterior margins of both lobes whitish in juveniles; dark caudal bar absent; dorsal and lateral surfaces of body bluish grey with an irregular array of moderately-large white spots; whitish ventrally; flank denticles tricuspid; monospondylous centra 41-45, precaudal centra 74-79, total centra 100-105 (Ref. 58446).

• Acanthias vulgaris Risso, 1827
• Squalus tasmaniensis Howell Rivero, 1936
• Squalus antiquorum Leach, 1818
• Spinax mediterraneus Gistel, 1848
• Squalus kirki Phillipps, 1931
• Squalus acanthias ponticus Myagkov & Kondyurin, 1986
• Squalus whitleyi Phillipps, 1931
• Squalus acanthias chilensis Suckow, 1799
• Acanthias commun Navarrete, 1898
• Acanthias americanus Storer, 1846
• Squalus barbouri Howell Rivero, 1936
• Squalus canis Forster, 1777
• Acanthias lebruni Vaillant, 1888
• Squalus achantias Linnaeus, 1758
• Acanthias antiguorum (Leach, 1818)
• Squalus fernandinus Molina, 1782
• Acanthias vulgaris Bonaparte, 1846
• Acanthias linnei Malm, 1877
• Squalus acanthias africana Myagkov & Kondyurin, 1986
• Squalus wakiyae Tanaka, 1918
• Squalus acanthis Linnaeus, 1758
• Squalus acanthias acanthias Linnaeus, 1758