Figure 1.
Geographic location of bonebed locality.
A: Southern Alberta and Dry Island Buffalo Jump Provincial Park. Scale bar equals 50 km. Modified with permission from Eberth and Currie [7]. B: Dry Island Buffalo Jump Provincial Park with bonebed locality site indicated by X. Scale bars equal 1 km.
Figure 2.
Material associated with CMN 12068.
A: Large section of body showing majority of preserved material in left lateral view. B: Right lateral view of caudal vertebral section (ventral at top). C: Dorsal view of right and left pedes, with numbered phalanges. Abbreviations: cav, caudal vertebra; dv, dorsal vertebra; il, ilium; is, ischium; lf, left femur; lfi, left fibula; lmts, left metatarsals; lp, left pubis; lpb, left pubic boot; lt, left tibia; prz, prezygapophyseal bar; rf, right femur; rmts, right metatarsals; rt, right tibia; vc, vertebral centrum. Scale bars equal 10 cm.
Figure 3.
Material associated with CMN 12069.
A: Appendicular elements in lateral view. B: Left and right metatarsals, and proximal phalanges, in dorsolateral view. C: Proximal section of caudal series in left lateral view. D: Distal section of caudal series in right lateral view. E: Dorsal view of right and left pedes, with numbered phalanges. Abbreviations: ch, chevron; lf, left femur; lt, left tibia; mt. II–IV, metatarsals II–IV; prz, prezygapophyseal bar; rfi, right fibula; ris, right ischium; rt, right tibia; ?rpb, possible right pubic boot; vc, vertebral centrum; II-1/II-2, phalanx elements II-1/II-2. Scale bars equal 10 cm.
Figure 4.
Material associated with CMN 12070.
A: Fragmentary lower hind limbs, primarily fragmentary metatarsals, in lateral views. B: Right and left lateral views of pubic boot. Abbreviations: lmt.V, left metatarsal V; lt, left tibia; mt.frag, metatarsal fragment; rmt.III, right metatarsal III; rmt.IV, right metatarsal IV; ?lfi, possible left fibula. Scale bars equal 10 cm.
Figure 5.
Results of phylogenetic analysis of ornithomimosaur taxa.
Results based upon analysis of a modified character/taxon matrix of Xu et al. [16]. Strict consensus of 5 most parsimonious trees (CI = 0.67, RI = 0.75). Fourteen of 31 post-cranial characters could be coded for the Dry Island bonebed specimens. Bootstrap and Bremer support values indicated at left and right, respectively, of each branch point.
Figure 6.
Stratigraphic occurrences of ornithomimids within the Horseshoe Canyon Formation.
Asterisk (*) indicates specimens referred by Russell [13] to Dromiceiomimus brevitertius. Specimens described in this study are marked in bold. Numbers 0–12 represent coal marker beds within the Horseshoe Canyon Formation. Abbreviations: CMN, Canadian Museum of Nature; DMT, Drumheller Marine Transgression; ROM, Royal Ontario Museum; RTMP, Royal Tyrrell Museum of Palaeontology.