After Xu, Norell, Wang, Makovicky & Wu, 2002, Clark, Norell & Makovicky, 2002, Hwang, Norell, Ji & Gao, 2002 and Makovicky, Norell, Clark & Rowe, 2003
<==o †Troodontidae Gilmore, 1924d [Saurornithoididae Barsbold, 1974] |?- †Elopteryx nopscai Andrews, 1913 |?- †Heptasteornis andrewsi Harrison & Walker, 1975 |?- †Tochisaurus nemegtensis Kurzanov & Osmólska, 1991 |?- †Koparion douglassi Chure, 1994 |?- †Tripriodon caperatus Marsh, 1889d |?- †Zapsalis abradens Cope, 1876b |?- †Troodontidae genera et species indet. [IGM 100/44] |?- †Borogovia gracilicrus Osmólska, 1987 |-- †Sinovenator changii Xu, Norell, Wang, Makovicky & Wu, 2002 `--+-- Troodontidae genera et species indet. [EK troodontid sensu Makovicky, Norell, Clark & Rowe, 2003] `--+-- †Sinornithoides youngi Russell & Dong, 1994 |-- †Byronosaurus jaffei Norell, Makovicky & Clark, 2000 `--o †“Troodontinae” Gilmore, 1924d |-- †Troodon formosus Leidy, 1856 [Polyodontosaurus grandis Gilmore, 1932b, Stenonychosaurus inequalis Sternberg, 1932a, Pectinodon bakkeri Carpenter, 1982b] `--o †Saurornithoides Osborn, 1924a |-- †S. mongoliensis Osborn, 1924a `-- †S. junior Barsbold, 1974
Reference(s):
- Keesey, T. M., 1996-2000: The Dinosauricon
–iNet: The Dinosauricon: http://dinosauricon.com/ - Osmólska, H., & Barsbold, R., 1990: Troodontidae. 259-268
in Weishampel, D. B., Dodson, P., & Osmólska, H. (eds.), 1990: The Dinosauria.
–University of California Press, Berkley, Los Angeles, Oxford, 1990 xvi-733 - Makovicky, P. J., Norell, M. A., Clark, J. M. & Rowe, T. B., 2003: Osteology and Relationships of Byronosaurus jaffei (Theropoda: Troodontidae).
–American Museum Novitates: #3402, pp. 1-32 - Norell, M. A., Makovicky, P. J., & Clark, J. M., 2000: A new troodontid theropod from Ukhaa Tolgod, Mongolia.
–Journal of Vertebrate Paleontology: Vol. 20, #1, pp. 7-11 - Norman, D., B., 1990: Problematic Theropoda: “Coelurosaurs”. 280-305
in Weishampel, D. B., Dodson, P., & Osmólska, H. (eds.), 1990: The Dinosauria.
–University of California Press, Berkley, Los Angeles, Oxford, 1990 xvi-733 - Xu, X., Norell, M. A., Wang, X., Makovicky, P. J. & Wu, X.-C., 2002: A basal troodontid from the Early Cretaceous of China.
–Nature: Vol. 415, pp. 780-784