Author: Frade, 1929

Oxynotus paradoxus Frade, 1929

Diagnosis: small sharks with body triangular in cross-section, very deep and very compressed. Mouth very small; lips thick, spongy, with a complex series of cross-folds; lower teeth in 13-15 series. Gill openings 5, very small. Two very high triangular dorsal fins, the first long, falcate, each with a large spine originating about at midpoint of their bases; first dorsal fin spine sloping a little backward; distance from tip of second dorsal spine to tip of fin generally as long as the spine (tip to base). A horizontal dermal ridge between bases of pelvic and pectoral fins. Colour: black without blotches. Size: to about 118 cm, usually 70-85 cm.

Habitat: benthic on upper slope at 265-720 m. Food: no data. Reproduction: size at birth about 25 cm.

Distribution: eastern Atlantic northward to Scotland. Elsewhere, southward to Senegal.

Kingdom Animalia
Phylum Chordata
Subphylum Vertebrata
Superclass Gnathostomata
Class Chondrichthyes
Superorder Pleurotremata
Family Oxinotidae
Genus Oxynotus
Species Oxynotus paradoxus

Status in World Register of Marine Species

Accepted name: Oxynotus paradoxus Frade, 1929

Scientific synonyms and common names

Oxynotus paradoxus Frade, 1929

Synonyms:

Oxynotus paradoxus Frade, 1929
Oxynotus paradoxus Frade, 1929, Bull. Soc. port. Sci. nat., 10 (22): 263-267, fig. 1-2 (off Morocco). Holotype: MB no. T 114.
Oxynotus paradoxus: Frade, 1932: pl. XX Norman, 1932: 77-79, fig. 1, pl. I Fraser-Brunner, 1935: 320 Tucker & Palmer, 1949: 930-931 Krefft, 1955: 158-160, fig. I Tortonese, 1956: 168 Bigelow & Schroeder, 1957: 1417 Rae & Lamont, 1960: 78 Cadenat, 1961: 232 Blacker, 1962: 264, 266 Rae & Pirie, 1967: 30; 1968: 201 Went, 1968: 36 Wheeler, 1969: 63-64, fig. Wheeler & Blacker, 1969: 313 Maurin & Bonnet, 1970: 14-15, fig. 9 Ledoux, 1970: 320-321, fig. 3.
Centrina paradoxa: Cadenat, 1950: 312.

Common names:

Sailfin roughshark [En]
Humantin [Fr]

Bigelow, H. B.; Schroeder, W. C. 1957. A study of the sharks of the suborder Squaloidea. Bull. Mus. comp. Zool. Harv., 117 (1) :1-150, fig. 1-16, pl. IIV.

Blacker, R. W. 1962. Rare fishes from the Atlantic Slope fishing grounds. Ann. Mag. nat. Hist., (13) 5: 261-271, fig. 1-2.

Cadenat, J.1950. Note sur les merlus de la côte occidentale d'Afrique. Congr. Pêches Pêcher. Un. Franc. d'Outre-Mer, Inst. Col. Marseille :128-130.

Cadenat, J.1961b. Notes d'Ichtyologie ouest-africaine. XXXIV. Liste complémentaire des espèces de poissons de mer (provenant des cotes de l'Afrique occidentale) en collection à la section de biologie marine de l'I.F.A.N. à Gorée. Bull. Inst. fr. Afr. noire, (A)23(1):231-245.

Frade, F. 1929. Une nouvelle espèce ou une aberration individuelle de l'Oxynotus centrina (L.). Bull. Soc. port. Sci. nat., 10 (22): 263-267, fig. 1-2.

Frade, F. 1932. Oxynotus paradoxus. In: L. Joubin, ed., Faune ichthyol. Atlant. N., Copenhagen: fiche 20.

Fraser-Brunner, A. 1935. New or rare fishes from the Irish Atlantic slope. Proc. R. ir. Acad., 42 (B-9): 319-326, fig. 1-5.

Krefft, G.1955. Ichthyologische Mitteilungen aus dem Institut für Seefischerei der Bundesforschungsanstalt für Fischerei. IV. 6. Weitere bemerkenswerte Fische aus den Gewässern des Island-Färöer-Rückens. Zool. Anz., 154 (7/8) :157-164, fig. 1-2.

Ledoux, J. C. 1970. Les dents des Squalidés de la Méditerranée occidentale et de l'Atlantique Nord-ouest africain. Vie Milieu, 21 (2A): 309-362, 21 fig.

Maurin, C.; Bonnet, M. 1970. Poissons des côtes nord-ouest africaines (Campagnes de la 'Thalassa', 1962 et 1968). Rev. Trav. Inst. (scient. tech.) Pech. marit., 34 (2): 125-170, fig. 1-26.

Norman, J. R.1932. Note on a shark, Oxynotus paradoxus Frade, new to the British fauna. Proc. zool. Soc. Lond., (5): 77-79, fig. 1, pl. I.

Rae, B. B.; Lamont, J. M. 1960. Rare fishes. Scotland. Annls biol., Copenh., 15 (1958): 78.

Rae, B. B.; Pirie, S. F. 1967a. Rare fishes. Scott. Fish. Bull., 28: 30-31.

Rae, B. B.; Pirie, S. F. 1968. Scottish records of rare fishes 1967. Annls biol., Copenh., 24 (1967): 201202.

Tortonese, E. 1956b. Leptocardia, Ciclostomata, Selachii. Fauna Ital., 2: 334 p., 163 fig.

Tucker, D. W.; Palmer, C. 1949. New British records of two rare deep-sea fishes: Oxynotus paradoxus Frade and Aphanopus carbo Lowe. Nature, Lond ,146 (4178): 930-931, 1 fig.

Went, A. E. J. 1968. Rare fishes taken in Irish waters in 1967. Ir. Nat. J., 16: 35-39.

Wheeler, A. 1969. The Fishes of the British Isles and North-West Europe. Macmillan, London, Melbourne and Toronto: i-xvii+1-163, 5+177 fig., +392 fig. (princ. sp.)+92 n. num. fig., 16 pl., maps.

Wheeler, A.; Blacker, R. W. 1972. Rare and little-known fishes in British seas in 1968 and 1969. J. Fish Biol., 4 :141-170, 1 fig.

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