Back تریناکسودون AZB Thrinaxodon liorhinus Catalan Thrinaxodon CEB Thrinaxodon German Thrinaxodon Spanish Thrinaxodon EU سهشاخهدندان FA Thrinaxodon Finnish Thrinaxodon French טרינקסודון HE
| Thrinaxodon Temporal range: Late Permian - Early Triassic,
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| Fossil of T. liorhinus in National Museum of Natural History | |
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| Diagram of skull in lateral view | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Synapsida |
| Clade: | Therapsida |
| Clade: | Cynodontia |
| Clade: | Epicynodontia |
| Family: | †Thrinaxodontidae Watson & Romer, 1956 |
| Genus: | †Thrinaxodon Seeley, 1894 |
| Type species | |
| Thrinaxodon liorhinus Seeley, 1894
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Thrinaxodon is an extinct genus of cynodonts, including the species T. liorhinus which lived in what are now South Africa and Antarctica during the Late Permian - Early Triassic. Thrinaxodon lived just after the Permian–Triassic mass extinction event, its survival during the extinction may have been due to its burrowing habits.[1]
Similar to other therapsids, Thrinaxodon adopted a semi-sprawling posture, an intermediary form between the sprawling position of basal tetrapods and the more upright posture present in current mammals.[2] Thrinaxodon is prevalent in the fossil record in part because it was one of the few carnivores of its time, and was of a larger size than similar cynodont carnivores.[citation needed]
- ^ Damiani, R.; Modesto, S.; Yates, A.; Neveling, J. (2003). "Earliest evidence of cynodont burrowing". Proceedings of the Royal Society of London B. 270 (1525): 1747–1751. doi:10.1098/rspb.2003.2427. JSTOR 3592240. PMC 1691433. PMID 12965004.
- ^ Blob R. 2001. Evolution of hindlimb posture in non-mammalian therapsids: biomechanical tests of paleontological hypotheses. 27(1): 14-38.