Monday, 25 November 2013

Charassognathus gracilis

This is the earliest known cynodont and the most primitive to date. Its discovery indicates that cynodonts first emerged and diversified in the Gondwana.

Charassognathus gracilis
Botha, Abdala and Smith, 2007
Meaning of generic name
Greek, charasso, prefix meaning ‘notch’ and gnathus , ‘jaw’, referring to the characteristic notch on the dentary.
[Meaning of specific name
Latin 'graceful']
Skull length: 60 mm, Length: 50 cm
Holotype (SAM-PK-K10369): complete skull and postcranial elements (cervicals, ribs and limbs elements).
Age and Distribution
Horizon: Hoedemaker Member of the Teekloof Formation, Tropidostoma assemblage zone, Upper Permian (Wuchianpingian).

Type locality: Farm Willowdene, Beaufort West District, Western Cape Province, South Africa.
Synapsida Therapsida Cynodontia
Further Reading
J. Botha, F. Abdala, and R. M. H. Smith. 2007. The oldest cynodont: new clues on the origin and early diversification of the Cynodontia. Zoological Journal of the Linnean Society 149(3):477-492.

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