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Squalus
Life   Vertebrata   Fish   Squalidae

Squalus acanthias
www.fao.org Copyright Michel Lamboeuf · 0
Squalus acanthias

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Squalus acanthias
© Copyright Photographer/SFTEP, 2002 · 0
Squalus acanthias
Squalus
© Copyright Photographer/SFTEP, 2002 · 0
Squalus
Kinds
espaņol

Overview
Main identification features
  • ds: with solid spine
  • tail base: 2 keels, notch above
  • teeth flat, compressed, oblique tips
  • no a
SQUALUS

DOGFISH SHARKS

Sharks with cylindrical bodies, short snouts; 5 gill slits; moderate sized spiracles just behind eyes; nasal flaps short, not reaching mouth; eyes without nictitating membrane; teeth similar sized on both jaws, with strongly oblique tips; no anal fin; 2 dorsal fins with ungrooved spines, origin of the first well before the pelvic fins; tail base with a pair of keels and a pit above, tip of fin without a notch on underside; skin with denticles.

This worldwide primarily subtropical to temperate genus contains 9 species; one circumglobal temperate species enters our area.


References
  • Linnaeus, C., 1758., Systema Naturae, Ed. X. (Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata.) Holmiae., Systema Nat. ed. 10, 1:1-824.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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Updated: 2018-11-14 17:17:16 gmt
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