Therochelonia

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Therochelonia
Temporal range: Late Permian - Early Cretaceous
Cistecephalus1DB.jpg
Life restoration of Cistecephalus Cistecephalus microrhinus
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Order: Therapsida
Infraorder: Dicynodontia
Parvorder: Therochelonia
Seeley, 1894
Subgroups

See text.

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.[1] Below is a simplified cladogram from Kammerer et al. (2011) showing the phylogenetic placement of Therochelonia:[2]

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[edit]

  1. ^ Kammerer, C.F.; Angielczyk, K.D. (2009). "A proposed higher taxonomy of anomodont therapsids" (PDF). Zootaxa. 2018: 1–24.
  2. ^ Kammerer, C.F.; Angielczyk, K.D.; 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.