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Comparison of 3D frontal models in dorsal, lateral, ventral, medial, anterior, and posterior, respectively, of Albertavenator curriei (top) and Troodon inequalis. Abbreviations: fc – frontal midline contact, lc – lacrimal contact with frontal, lcb – lacrimal buttress, lsc – laterosphenoid contact with frontal, nc – nasal contact with frontal, or – orbital rim, pc – parietal contact with frontal, pl – parietal lappet, poc – postorbital contact with frontal, scf – supraciliary foramen. Scale bar – 1 cm. Image credit: Evans et al, doi: 10.1139/cjes-2017-0034.