Temporal range: Early Cretaceous, 140.2–99.6Ma
|Mounted skeleton of a Psittacosaurus|
The Psittacosauridae were a group of ceratopsian dinosaurs, which lived between 140.2 and 99.6 million years ago. The family Psittacosauridae was first named by American paleontologist Henry Fairfield Osborn in 1923. The first exact definition as a clade was in 2005 by Paul Sereno: the stemclade consisting of Psittacosaurus mongoliensis, Osborn 1923, and all species more closely related to Psittacosaurus than to Triceratops horridus, Marsh 1889.
- Holtz, Thomas R. Jr. (2011) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages, Winter 2010 Appendix.
- Osborn, H.F. (1923). "Two Lower Cretaceous dinosaurs of Mongolia". American Museum Novitates 95: 1-10.
- Sereno, P.C. (2010). "Taxonomy, cranial morphology, and relationships of parrot-beaked dinosaurs (Ceratopsia: Psittacosaurus)". In M. J. Ryan, B. J. Chinnery-Allgeier, D. A. Eberth (eds.), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Indiana University Press, Bloomington 21-58.