This taxon is considered nomen dubium, species not entered
of the valid taxon Troodontidae
according to the Paleobiology Database.
See the page for Troodontidae →
Bibliography
Original description
D. J. Chure. 1994. Koparion douglassi, a new dinosaur from the Morrison Formation (Upper Jurassic) of Dinosaur National Monument; the oldest troodontid (Theropoda: Maniraptora). Brigham Young University Geology Studies 40:11-15