Craniata

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This article has been tagged since January 2007.

Craniata
Fossil range: early Early Cambrian - Recent

Pacific Hagfish resting on bottom280 m down off Oregon coast

Pacific Hagfish resting on bottom
280 m down off Oregon coast

Scientific classification

Kingdom:	Animalia
Phylum:	Chordata
(unranked)	Craniata

Hyperotreti
Vertebrata

Craniata is an unranked group of chordate animals that contains the vertebrates (subphylum Vertebrata) and hagfish (Myxini), which are sometimes grouped under Vertebrata. Craniata includes all animals with skulls, hence the name.

Recent genetic analysis (see Hagfish) indicates that Myxini should be a part of Vertebrata. In this case Craniata might now be superfluous as a separate clade.

Craniata include all organisms that have a cranium. Other such characteristics include: - 2 Chambered heart - Tripartite brain - Specialized sense organs - Lateral line system (used for hearing) - 1 Semi-Circular canal

Myxini (or Hyperotreti)
- Myxiniformes
  - Myxinidae
Vertebrata
- Gnathostomata
  - Chondrichthyes
  - Teleostomi
- Hyperoartia
  - Petromyzontiformes

Craniates have skulls, like this pygmy hippopotamus skull

Craniates have skulls, like this pygmy hippopotamus skull

This animal-related article is a stub. You can help Wikipedia by expanding it.

Retrieved from "http://en.wikipedia.org../../../c/r/a/Craniata.html"

Categories: Articles to be expanded since January 2007 | All articles to be expanded | Chordates | Animal stubs

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