Fig. 5 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA

Fig. 5. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979, from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; detail of frontal morphology showing the variable development of frontal depressions. A. ROM 66182, in anterodorsal view. B. ROM 66181, in oblique right anterodorsal view. C. ROM 66180, in oblique right posterodorsal view. Scale bars 20 mm.