Tylopoda

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Tylopoda
Temporal range: Middle Eocene to Recent
A Dromedary camel
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Suborder: Tylopoda
Illiger, 1811
Families

 Camelidae
 Oromerycidae
 Agriochoeridae
 Merycoidodontidae
 Xiphodontidae
 Cainotheriidae

Tylopoda (meaning "swollen foot") is a suborder of terrestrial herbivorous even-toed ungulates belonging to Artiodactyla. They are extant in the wild in their native ranges of South America and Asia, while Australian feral camels are an introduced species. The group has a long fossil history in North America and Europe. Tylopoda appeared during the Eocene around 46.2 million years ago.[1]

Tylopoda has only one extant family, Camelidae, which includes camels, llamas, guanacos, alpacas and vicuñas. This group was much more diverse in the past, containing the now extinct families Xiphodontidae, Oromerycidae and Cainotheriidae, as well as the two families of oreodonts, Agriochoeridae and Merycoidodontidae.

[edit] Taxonomy

Life restoration of Agriochoerus antiquus

Tylopoda was named by Illiger (1811). It is extant. It was considered monophyletic by Matthew (1908). It was reranked as the unranked clade Tylopoda by Matthew (1908); it was reranked as the suborder Tylopoda by Carroll (1988), Ursing et al. (2000) and Whistler and Webb (2005). It was assigned to Ruminantia by Matthew (1908); to Artiodactyla by Flower (1883) and Carroll (1988); to Neoselenodontia by Whistler and Webb (2005); and to Cetartiodactyla by Ursing et al. (2000) and Agnarsson and May-Collado (2008).[2][3][4]

   Cetartiodactyla   

 Tylopoda


   Artiofabula   

 Suina    


   Cetruminantia   

 Ruminantia


   Whippomorpha   

 Hippopotamidae



 Cetacea






[edit] References

  1. ^ PaleoBiology Database: Priscocamelus, basic info
  2. ^ W. D. Matthew. 1908. Osteology of Blastomeryx and phylogeny of the American Cervidae. Bulletin of the American Museum of Natural History 24(27):535-562
  3. ^ R. L. Carroll. 1988. Vertebrate Paleontology and Evolution. W. H. Freeman and Company, New York 1-698
  4. ^ B. M. Ursing, K. E. Slack, and U. Arnason. 2000. Subordinal artiodactyl relationships in light of phylogenetic analysis of 12 mitochondrial protein-coding genes. Zoologica Scripta 29:83-88


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