Pristeroognathus
Animalia — Chordata
Subphylum : Vertebrata 
Superclassis : Tetrapoda 
Classis : Synapsida 
Ordo : Therapsida 
Broom, 1905
   
Palaeontologia
Permianum inferiore - Praesentum
Subdivisiones: Subordines
* Biarmosuchia
  • Dinocephalia
  • Anomodontia
  • Gorgonopsia
  • Therocephalia
  • Cynodontia

Therapsida sunt ordo synapsidum qui mammalia et eorum maiores recte evolutionarios comprehendit. Primum fossile ad Therapsida attributum habetur Tetraceratops insignis ex Aevo Permiano.[1][2] Therapsida ex pelycosauria, diserte ex sphenacodontibus, abhinc annorum 275 milliones evolverunt.

Notae

  1. ↑ M. Laurin et R. R. Reisz (1996), "The osteology and relationships of Tetraceratops insignis, the oldest known therapsid," Journal of Vertebrate Paleontology 16(1): 95–102.
  2. ↑ J. Liu, B. Rubidge, et J. Li (2009), "New basal synapsid supports Laurasian origin for therapsids," Acta Palaeontologica Polonica, 54(3): 393–400.

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