Cow shark

Cow sharks
Temporal range: Upper Jurassic–Recent[1]
Possible Permian occurrence
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Order: Hexanchiformes
Family: Hexanchidae
J. E. Gray, 1851
Genera

See text

Cow sharks are a shark family, the Hexanchidae, characterized by an additional pair or pairs of gill slits. Its 37 species are placed within the 10 genera: Gladioserratus, Heptranchias, Hexanchus, Notidanodon, Notorynchus, Pachyhexanchus, Paraheptranchias, Pseudonotidanus, Welcommia, and Weltonia.[2]

  1. ^ Cite error: The named reference FB was invoked but never defined (see the help page).
  2. ^ Allen, 45