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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.



Name


Charassognathus gracilis


Authority
   

Botha, Abdala and Smith, 2007


Meaning of the generic name


Greek, charasso, prefix meaning ‘notch’ and gnathus , ‘jaw’, referring to the characteristic notch on the dentary.


Size


Skull length: 60 mm, Length:  50 cm


Remains


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.


Classification


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.

 Synonyms

 





Skull reconstruction of Charassognathus gracilis. From Botha et al., 2007. Scale bar is 10 mm (insert 1 mm).

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