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Temporal range: Late Triassic, 208Ma
Agnosphitys cromhallensis2 copia.jpg
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Suborder: Sauropodomorpha
Family: Guaibasauridae
Genus: Agnosphitys
Fraser et al., 2002
Species: A. cromhallensis
Fraser et al., 2002

Agnosphitys (/ˌæɡnɵˈsftɨs/; "unknown begetter"; sometimes mistakenly called Agnostiphys or Agnosphytis) is a disputed genus of dinosaur. It contains only one species, the type species A. cromhallensis. Its remains include an ilium, maxilla, astragalus and humerus, which date variously from the Norian and Rhaetian stages of the Late Triassic. It may be a chimera.

Agnosphitys lies close to the ancestry of dinosaurs, although exactly where is disputed by researchers. Some consider it a saurischian dinosaur close to the beginnings of dinosaur evolution, while others consider it a dinosauromorph, an archosaur near the evolution of the dinosaurs.

The type species, Agnosphitys cromhallensis, was described by Fraser, Padian, Walkden and Davis in 2002. The fossils, consisting of a partial skeleton including referred material, were found in Avon, England.

External links[edit]


  • Fraser, Padian, Walkden and Davis, 2002. Basal dinosauriform remains from Britain and the diagnosis of the Dinosauria. Palaeontology. 45(1), 79-95.
  • Langer, 2004. Basal Saurischia. In Weishampel, Dodson and Osmolska. The Dinosauria Second Edition. University of California Press. 861 pp.
  • Yates, 2007. Solving a dinosaurian puzzle: the identity of Aliwalia rex Galton. Historical Biology. 19(1), 93-123.
  • Ezcurra, 2010. A new early dinosaur (Saurischia: Sauropodomorpha) from the Late Triassic of Argentina: A reassessment of dinosaur origin and phylogeny. Journal of Systematic Palaeontology. 8(3), 371-425.