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Règne :
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Animalia
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Embranchement :
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Chordata
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Classe :
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Elasmobranchii
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Ordre :
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Squaliformes
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Famille :
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Centrophoridae
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Genre :
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Centrophorus
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Espèce :
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squamosus
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| Nom Français : |
Squale-chagrin de l'Atlantique
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| Nom Vernaculaire : |
Leafscale gulper shark
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Description :
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fieldmarks: No anal fin, two dorsal fins with large spines, bladelike unicuspidate teeth in upper and lower jaws, with lowers much larger than uppers, a moderately long snout, leaf-shaped multicuspidate, imbricated lateral denticles, and rear tips of pectoral fins broadly angular and not strongly extended.
Snout moderately long, broadly parabolic, preoral snout almost equal to mouth width but shorter than distance from mouth to pectoral origins; upper anterolateral teeth with erect to semioblique cusps. First dorsal fin relatively low and long; second dorsal moderately large, as high or higher than underside of head first, with base about 2/3 length of first dorsal base, and spine origin about over rear tips or inner margins of pelvic fins; distance from first dorsal insertion to origin of second dorsal spine about as long as tip of snout to pectoral midbases in adults; free rear tips of pectoral fins forming broad angles, not expanded into elongated lobes and not reaching the level of first dorsal spine, inner margins shorter than distance from second dorsal spine to caudal origin; caudal fin with a shallowly concave postventral margin in adults. Lateral trunk denticles overlapping one another, with slender pedicels elevating flat, leaflike crowns, a strong main cusp and 3 or more pairs of lateral cusps on their posterior edges in adults (lateral cusps increasing from a pair in young with denticle replacement with growth).
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Auteurs & dates :
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Centrophorus squamosus (Bonnaterre, 1788)
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Recherche des images :
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Photo
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