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Therochelonia

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Therochelonia
Temporal range: Late Permian - Early Cretaceous
Life restoration of Cistecephalus Cistecephalus microrhinus
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Order: Therapsida
Clade: Chainosauria
Infraorder: Dicynodontia
Clade: Therochelonia
Seeley, 1894

Therochelonia is a group of dicynodont therapsids. The group was named by British paleontologist Harry Seeley in 1894 and fell into disuse in the following century. Therochelonia was redefined as a node-based clade in 2009. It is defined as the last common ancestor of Cistecephalus microrhinus and Dicynodon lacerticeps, and all of its descendants. Below is a simplified cladogram from Kammerer et al. (2011) showing the phylogenetic placement of Therochelonia:

Dicynodontia 

Eodicynodon




Pylaecephalidae




Eumantellidae




Endothiodontidae


 Therochelonia 
 Emydopoidea 

Emydopidae




Kingoriidae



Cistecephalidae



Myosauridae




 Bidentalia 
 Cryptodontia 

Rhachiocephalidae




Oudenodontidae



Geikiidae




 Dicynodontoidea 

"Dicynodon"




Lystrosauridae


 Kannemeyeriiformes 

Shansiodontidae



Kannemeyeriidae



Stahleckeriidae



Dinodontosauridae











References

  1. Kammerer, C.F.; and Angielczyk, K.D. (2009). "A proposed higher taxonomy of anomodont therapsids". Zootaxa 2018: 1–24.  Cite uses deprecated parameters (help)
  2. Kammerer, C.F.; Angielczyk, K.D.; and Fröbisch, J. (2011). "A comprehensive taxonomic revision of Dicynodon (Therapsida, Anomodontia) and its implications for dicynodont phylogeny, biogeography, and biostratigraphy". Journal of Vertebrate Paleontology 31 (Suppl. 1): 1–158. doi:10.1080/02724634.2011.627074.  Cite uses deprecated parameters (help)

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