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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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Carcharhiniformes
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Famille :
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Sphyrnidae
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Genre :
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Sphyrna
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Espèce :
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lewini
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| Nom Français : |
Requin-marteau
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| Nom Vernaculaire : |
scalloped hammerhead shark
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Description :
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Scalloped hammerheads have a small but prominent notch in the center of their characteristically-shaped head, which also bears pronounced grooves along its anterior margin, giving this species its common name. The side “wings” of the head are relatively narrow and are swept backwards. The first dorsal fin is larger than the second and is sickle-shaped, with a rounded tip, while the second dorsal fin has a concave rear edge. Both the pectoral and dorsal fins are slightly rounded. The tips of the pectoral fins are either a dark grey or black. The caudal fin is heterocercal and forked. Body coloration in this species displays typical pelagic countershading, with a grey dorsum and a white ventral surface. ("Scalloped Hammerhead Sharks, Sphyrna lewini", 1998; Bester, 2012; Carpenter, 2011)
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Auteurs & dates :
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Sphyrna lewini (Griffith & Smith, 1834)
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Recherche des images :
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Photo
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