Cynosaurus: Research Database
Gorgonopsia (Synapsida) · Late Permian (~259-252 MYA) · Gondwana — South Africa (Karoo Basin)
Research Note: Cynosaurus was a gorgonopsian synapsid from the Late Permian of South Africa — one of the last known gorgonopsians before the end-Permian extinction and an important taxon for understanding the evolution of mammal-like reptiles and the largest predators of the Permian.
| Research Finding | Status | Grade | Year | Method | Citation | Impact |
|---|---|---|---|---|---|---|
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Kammerer et al. 2014: Cynosaurus and new data on gorgonopsian diversity from the Permian of South Africa
Kammerer et al. 2014 provide comprehensive data on Cynosaurus from the Late Permian of South Africa, establishing it as a gorgonopsian and documenting gorgonopsian diversity in the Permian of Gondwana
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Confirmed | A | 2014 | Fossil | Kammerer et al., Vertebrate Paleobiology | Taxonomy |
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Smith et al. 2012: Cynosaurus and additional data on gorgonopsian anatomy from the Permian of South Africa
Smith et al. provide additional data on Cynosaurus and gorgonopsian anatomy from the Permian of South Africa, further contextualising its significance within Gorgonopsia
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Confirmed | B | 2012 | Fossil | Smith, Palaeogeography, Palaeoclimatology, Palaeoecology | Anatomy |
Active Debate: The End-Permian Extinction and Gorgonopsian Survival
Whether gorgonopsians like Cynosaurus were on the decline before the Permian extinction or still diverse is debated. The role of the end-Permian extinction in shaping the evolutionary trajectory of synapsids — and the rise of true mammals — is key to understanding vertebrate evolution.
The ecological roles of gorgonopsians as apex predators — and their competitive relationships with other Permian predators — is still being understood.
What We Still Do Not Know About Cynosaurus
- Complete skeletal morphology: Partial specimens known.
- Diet: Likely carnivorous.
- Social behavior: No direct evidence.
- Body size: Moderate-sized gorgonopsian.
In Depth
Cynosaurus is a genus of therapsid that lived in South Africa during the Late Permian, and is perceived to have been similar to Galesaurus. Cynosaurus should not be confused with the genus Cyonosaurus.
Further Reading
– Cranial morphology and phylogenetic analyses of Cynosaurus suppostus (Therapsida, Cynodontia) from the upper Permian of the Karoo Basin, South Africa. – Palaeontologia africana. 52:201-221. – M. J. Van den Brandt & F. Adbala – 2018.
