Fig. 7 in A new Arctic hadrosaurid from the Prince Creek Formation (lower Maastrichtian) of northern Alaska ...

• Main Authors: Mori, Hirotsugu, Druckenmiller, Patrick S., Erickson, Gregory M.
• Format: Still Image
• Language: unknown
• Published: Zenodo 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Hadrosauridae; Ugrunaaluk; Arctic; Canada; Prince Creek; Alaska
• Online Access: https://dx.doi.org/10.5281/zenodo.13263715; https://zenodo.org/doi/10.5281/zenodo.13263715

Fig. 7. Postorbital comparison of a size class 3 Ugrunaaluk kuukpikensis gen. et sp. nov. (A, UAMES 33308) from the early Maastrichtian Prince Creek Formation, Alaska, right postorbital in medial (A1) and anterior (A2) views; size class 2 Edmontosaurus annectens Marsh, 1982 (B, ROM 53513, reversed) from the late Maastrichtian Lance Formation, Wyoming, USA, left postorbital in medial (B1) and anterior (B2) views; and adult Kundurosaurus nagornyi C, AENM 2/921-6) from the Maastrichtian Udurchukan Formation, Kundur, Russia, left postorbital in medial view (from Godefroit et al. 2012: fig. 6). Note that size class 3 of U. kuukpikensis does not possess a deep posterior orbital pocket seen in the size class 2 specimens of E. annectens, although the articular surface with the frontal is nearly identical. D. Left postorbital of E. annectens (CMN 8509) from the late Maastrichtian Lance Formation, Saskatchewan, Canada, showing how the jugal process width is defined. E. Postorbital regression analyses. Biplots of the ... : Published as part of Mori, Hirotsugu, Druckenmiller, Patrick S. & Erickson, Gregory M., 2016, A new Arctic hadrosaurid from the Prince Creek Formation (lower Maastrichtian) of northern Alaska, pp. 15-32 in Acta Palaeontologica Polonica 61 (1) on page 22, DOI: 10.4202/app.00152.2015, http://zenodo.org/record/13263701 ...