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Comparison of the frontals of Parahesperornis KUVP 2287 (1), Hesperornis KUVP 71012 (2), and Pasquiaornis RSM P2995.4 [65] (3) in dorsal (A), ventral (B), and right lateral (C) views. Specimens are scaled to be of similar size across the right frontal and aligned at the caudal margin of the orbit. Extraneous bones and fragments have been digitally removed from 1.
