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Spurdog

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Title: Spurdog  
Author: World Heritage Encyclopedia
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Subject: Western longnose spurdog, Squalidae, Squaliformes, Campanian first appearances, Mandarin dogfish
Collection: Campanian First Appearances, Squalidae
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Spurdog

Spurdogs
Temporal range: Campanian to Present
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Squalus acanthias
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Order: Squaliformes
Family: Squalidae
Genus: Squalus
Linnaeus, 1758

Squalus is a large genus of dogfish sharks, one of two genera in the family Squalidae. Commonly known as spurdogs, these sharks are characterized by smooth dorsal fin spines, teeth in upper and lower jaws similar in size, caudal peduncle with lateral keels; upper precaudal pit usually present, and caudal fin without subterminal notch.

The name comes from squalus, the Latin for shark; this word is the root for numerous words related to sharks such as squaline, and scientific names for sharks, such as the order Squaliformes.

Species

There are currently 26 recognized species in this genus:

See also

References

  1. ^ Sepkoski, J. (2002). "A compendium of fossil marine animal genera (Chondrichthyes entry)". Bulletins of American Paleontology, 364: p.560. 
  2. ^ Naylor, G.J.P., Caira, J.N., Jensen, K., Rosana, K.A.M., White, W.T. & Last, P.R. (2012): A DNA sequence–based approach to the identification of shark and ray species and its implications for global elasmobranch diversity and parasitology. Bulletin of the American Museum of Natural History, 367: 1–262.
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