Dari Zaman PErm tengah.
Pohon evolusinya terbagi menjadi 9 dahan
* Archosauria
* Proterochapmsia
* Erythrosuchia
* Proterosuchia
* Prolacertiformes
* Trilophosauria
* Rhynchosauria
* Choristodera
* Placodontia
Bacaan lanjut
Brochu, CA (2001), Progress and future directions in archosaur phylogenetics. J. Paleontol. 75: 1185–1201.
Burmeister, KC, JJ Flynn, JM Parrish, RL Whatley & AR Wyss (2000), Biostratigraphic and biogeographic implications of new middle to Late Triassic fossil vertebrates; Morondava Basin, Madagascar, Abstracts of the 2000 Meeting of the Western Association of Vertebrate Paleontologists, Museum of Northern Arizona, Flagstaff - pdf. -
Carroll, RL (1988), Vertebrate Paleontology and Evolution, WH Freeman & Co., 698 pp.
sumber gambar
http://www.palaeos.com/Vertebrates/Units/270Archosauromorpha/270.630.html
