[D] Orodromeus makelai [Eg] [Su] [sG] [T]
Horner & Weishampel, 1988
Cretaceous Late Campanian
Ornithischia Ornithopoda Hypsilophodontidae
Two Medicine Formation, Montana, US
Genus - Typespecies - Skull - Eggs
3 partial skeletons, cranial and postcranial elements, clutch of 19 eggs containing embryos.
Known from a remarkable growth series, including still unhatched embryos in eggs (Horner and Weishampel, 1988) The teeth of Orodromeus resemble those of Fabrosaurus very closely. The tibia of Orodromeus is considerably longer than the femur. The holotype specimen is a nearly complete skull and partial skeleton lacking the tail presently at the Museum of the Rockies at Bozeman.
Orodromeus juveniles were able to forage for themeselves shortly after hatching and did not require parental care, as did juveniles of the sympatric hadrosaur Maiasaura.