Therochelonia

Extinct clade of dicynodonts

Therochelonia
Temporal range: Late Permian–Late Triassic
PreꞒ
O
S
D
C
P
T
J
K
Pg
N
Life restoration of Cistecephalus Cistecephalus microrhinus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Clade: Therapsida
Suborder: Anomodontia
Clade: Dicynodontia
Clade: 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]

References

  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. Bibcode:2011JVPal..31S...1K. doi:10.1080/02724634.2011.627074. S2CID 84987497.
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Synapsida
    • see Synapsida
Anomodontia
    • see below↓
Anomocephaloidea
Venyukovioidea
Chainosauria
Dicynodontia
    • see below↓
Galepus jouberti
Pylaecephalidae
Endothiodontia
Therochelonia
Emydopoidea
Emydopidae
Myosauridae
Kingoriidae
Cistecephalidae
Bidentalia
    • see below↓
Diictodon feliceps Dicynodontoides recurvidens
Elphidae
Geikiidae
Oudenodontidae
Rhachiocephalidae
Dicynodontoidea
Lystrosauridae
Kannemeyeriiformes
    • see below↓
Geikia elginensis Lystrosaurus murrayi
Shansiodontidae
Kannemeyeriidae
Stahleckeriidae
Placeriinae
Stahleckeriinae
Lisowicia bojani
Nomina dubia
Paraphyletic groups
Taxon identifiers
Therochelonia


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