Biology:Epicynodontia

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Short description: Clade of cynodonts

Epicynodontia
Temporal range: Late Permian-Present, 260–0 Ma
Thrinaxodon Lionhinus.jpg
Skeleton of Thrinaxodon liorhinus, a basal epicynodont
Sperm whale pod.jpg
Sperm whale, a modern-day epicynodont
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Clade: Therapsida
Clade: Cynodontia
Clade: Epicynodontia
Hopson & Kitching, 2001
Subgroups

Epicynodontia is a clade of cynodont therapsids that includes most cynodonts, such as galesaurids, thrinaxodontids, and Eucynodontia (including mammals). It was erected as a stem-based taxon by Hopson and Kitching (2001) and defined as the most inclusive clade containing Mammalia and excluding Procynosuchus, a Late Permian genus that is one of the most basal cynodonts.[1]

Below is a cladogram from Pusch et al. (2023) showing one hypothesis of cynodont relationships:[2]

Cynodontia

Charassognathidae Abdalodon diastematicus life restoration.jpg

Dvinia prima Dvinia prima life restoration.jpg

Procynosuchus delaharpeae Procynosuchus NT.jpg

Epicynodontia

Nythosaurus larvatus

Galesaurus planiceps Galesaurus planiceps life restoration.jpg

Progalesaurus lootsbergensis

Cynosaurus suppostus

Vetusodon elikhulu

Thrinaxodon liorhinus Thrinaxodon BW.jpg

Nanictosaurus kitchingi

Platycraniellus elegans

Bolotridon frerensis

Eucynodontia Phylogenetic tree of marsupials derived from retroposon data (Paucituberculata).png

References

  1. Hopson, J.A.; Kitching, J.W. (2001). "A probainognathian cynodont from South Africa and the phylogeny of nonmammalian cynodonts". Bulletin of the Museum of Comparative Zoology 156 (1): 5–35. https://archive.org/stream/cbarchive_37064_aprobainognathiancynodontfroms1863/aprobainognathiancynodontfroms1863#page/n1/mode/2up. 
  2. Pusch, L. C.; Kammerer, C. F.; Fernandez, V.; Fröbisch, J. (2023). "Cranial anatomy of Nythosaurus larvatus Owen, 1876, an Early Triassic cynodont preserving a natural endocast". Journal of Vertebrate Paleontology 42 (3): e2174441. doi:10.1080/02724634.2023.2174441. 

Wikidata ☰ Q5382672 entry