Apex of frontoparietal dome of UA2 (Stegoceras validum) (A), and cranial orientation during combat (B); Apex of frontoparietal dome of ZPAL MgD-I/104 (Prenocephale prenes) (C), and cranial orientation during combat (D).
Joseph E. Peterson, Collin Dischler, Nicholas R. Longrich
CC BY 2.5
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