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Hexanchidae
COW SHARKS
Sevengill sharks

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Notorynchus cepedianus
© Copyright Ross Robertson, 2006 · 12
Notorynchus cepedianus
Hexanchus griseus
© Copyright Photographer/SFTEP, 2002 · 0
Hexanchus griseus

Notorynchus
© Copyright Photographer/SFTEP, 2002 · 0
Notorynchus
Notorynchus cepedianus
www.fao.org Copyright Michel Lamboeuf · 0
Notorynchus cepedianus

Notorynchus cepedianus
© Copyright Photographer/SFTEP, 2002 · 0
Notorynchus cepedianus
español

Overview
Main identification features
  • head wide, round
  • 1 dorsal fin behind pelvic
  • tail fin very asymmetric
  • 6 gill slits before pectoral
FAMILY HEXANCHIDAE

SIXGILL SHARKS, SEVENGILL SHARKS

Six or seven large gill slits, none over pectoral base; head and snout wide, rounded; small spiracle present, well behind eye; lower teeth comblike (long, low, serrated); one dorsal fin, at rear of body near tail; tail with small lower lobe.

This family, with a two genera and three species, occurs in tropical to temperate parts of all 3 oceans; two circumglobal temperate species enter the fringes of our region.


References
  • Acevedo , G. , Rubio , E. A. and Zapata, L. A., 1998., Primer hallazgo del tiburon cañabota Hexanchus griseus (Bonaterre, 1788) (Pisces: Chondrichthyes, Hexanchidae) en aguas del pacifico tropical americano., Bol. Invest. Mar. Cost., 27:39-44.
  • Bonnaterre, J. P., 1788., Tableau encyclopédique et méthodique des trois règnes de la nature... Ichthyologie. Paris., Tabl. Encyclop. Méthod. Ichthyol., :1-215.
  • Béarez, P., 1996., Lista de los Peces Marinos del Ecuador Continental., Revista de Biologia Tropical, 44:731-741.
  • Compagno, L.J.V., 1999., Checklist of living elasmobranchs. In Hamlett W.C. (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes., The John Hopkins University Press:471-498.
  • Compagno, L.J.V., 1984., Sharks of the World. An annotated and illustrated catalogue of sharks species known to date. Part 1. Hexanchiformes to Lamniformes. FAO Species Catalogue., FAO Fish. Synop. No 125, 4(1):1-249.
  • Eschmeyer , W. N. , Herald , E. S. and Hamman, H., 1983., A field guide to Pacific coast fishes of North America from the Gulf of Alaska to Baja California. Peterson Field Guide Ser. 28., Houghton Mifflin:336pp.
  • Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versión 1.0. Projecto de la Macrofauna del Golfo .  Derechos reservados de los autores y Conservación Internacional.
  • Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen II. Vertebrados - Parte 1., FAO2:647-1200.
  • Jimenez-Prado, P., Béarez, P., 2004., Peces marinos del Ecuador continental / Marine fishes of continental Ecuador., SIMBIOE/NAZCA/IFEA tomo 1 y 2.
  • Love, M.S., Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2005., es of the West Coast and Alaska: a checklist of North Pacific and Artic Ocena species from Baja California to the Alaska-Yukon border., U.S. Department of the Interior, U.S. Geological Survey, Biological Resources Division, 288pp.
  • Nelson, J.S., 1984., Fishes of the World (Third edition)., John Wiley and Sons:523pp.
  • Perón, F., 1807., Voyage de Découvertes aux Terres Australes, exécuté par ordre de sa majesté l'Empereur et Roi, sur les Corvettes la Géographe, la Naturaliste et la Goulette le Casuarina, pendant les années 1800, 1801, 1803 et 1804. Paris., Voyage Terres Australes, 1:1-496.

Acknowledgements

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


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