Cyonosaurus

Cyonosaurus; Temporal range: Late Permian (Wuchiapingian to Changhsingian), 256.6–252 Ma PreꞒ Ꞓ O S D C P T J K Pg N As. S Artin. Kung. Road. W Ca. Wu. C
	Skull of C. longiceps in the Field Museum of Natural History.
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Therapsida
Clade:	†Gorgonopsia
Genus:	†Cyonosaurus; Olson, 1937
Species
	†C. longiceps Olsen, 1937 (type); †C. rubidgei (Broom, 1937 [originally Cyniscops rubidgei]); †C. kitchingi (Broom, 1936 [originally Galerhynchus kitchingi]); †C. broomianus (von Huene, 1950 [originally Cyniscops broomianus]); †C. tenuirostris (Boonstra, 1953 [originally Tangagorgon tenuirostris]);
Synonyms
	Cyniscops Broom, 1937; Cyniscopoides Brink and Kitching, 1953; Tangagorgon Boonstra, 1953;

Cyonosaurus is a genus of gorgonopsian therapsids from the Late Permian of South Africa and Zambia.^[1]^[2] The type species Cyonosaurus longiceps was named in 1937.^[3] Cyonosaurus had a skull length between 9 to 18 centimetres (3+1⁄2 to 7 in).^[3] However, an unnamed species of Cyonosaurus was noted to have a skull length of 20 cm (7.9 in).^[2] Originally, some have been reported from Early Triassic strata, but further investigation revealed that these reports were erroneous. Suggesting that Cyonosaurus went extinct during the Permian-Triassic mass extinction.^[1]

References

1 2 Benoit, Julien; Kammerer, Christian F.; Dollman, Kathleen; Groenewald, David P.; Smith, Roger M.H. (15 March 2024). "Did gorgonopsians survive the end-Permian "Great Dying"? A re-appraisal of three gorgonopsian specimens (Therapsida, Theriodontia) reported from the Triassic Lystrosaurus declivis Assemblage Zone, Karoo Basin, South Africa". Palaeogeography, Palaeoclimatology, Palaeoecology. 638 112044. doi:10.1016/j.palaeo.2024.112044. Retrieved 21 May 2024 – via Elsevier Science Direct.
1 2 Acker, Alex; Peecook, Brandon R.; Sidor, Christian A.; Whitney, Megan R. (2025). "The first occurrence of Cyonosaurus (Therapsida, Gorgonopsia) from the Luangwa Basin of Zambia". Journal of Vertebrate Paleontology. 45. doi:10.1080/02724634.2024.2444407.
1 2 Gebauer, E.V.I. (2007). Phylogeny and evolution of the Gorgonopsia with a special reference to the skull and skeleton of GPIT/RE/7113 ('Aelurognathus?' parringtoni) (PDF) (Ph.D. thesis). Tübingen: Eberhard-Karls Universität Tübingen. pp. 1–316. Archived from the original on December 2, 2022.

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[:0-1] 1 2 Benoit, Julien; Kammerer, Christian F.; Dollman, Kathleen; Groenewald, David P.; Smith, Roger M.H. (15 March 2024). "Did gorgonopsians survive the end-Permian "Great Dying"? A re-appraisal of three gorgonopsian specimens (Therapsida, Theriodontia) reported from the Triassic Lystrosaurus declivis Assemblage Zone, Karoo Basin, South Africa". Palaeogeography, Palaeoclimatology, Palaeoecology. 638 112044. doi:10.1016/j.palaeo.2024.112044. Retrieved 21 May 2024 – via Elsevier Science Direct.

[:1-2] 1 2 Acker, Alex; Peecook, Brandon R.; Sidor, Christian A.; Whitney, Megan R. (2025). "The first occurrence of Cyonosaurus (Therapsida, Gorgonopsia) from the Luangwa Basin of Zambia". Journal of Vertebrate Paleontology. 45. doi:10.1080/02724634.2024.2444407.

[GEVI07-3] 1 2 Gebauer, E.V.I. (2007). Phylogeny and evolution of the Gorgonopsia with a special reference to the skull and skeleton of GPIT/RE/7113 ('Aelurognathus?' parringtoni) (PDF) (Ph.D. thesis). Tübingen: Eberhard-Karls Universität Tübingen. pp. 1–316. Archived from the original on December 2, 2022.

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Cyonosaurus

See also

References