Fig. 1 in More evidence for plesiomorphy of the quadrate in the Eocene anseriform avian genus Presbyornis

Fig. 1. The quadrates of anseriform bird Presbyornis from the Lower Eocene of Tsagaan Khushuu, Mongolia. A. PIN 3104-209 (reversed). B. PIN 3104- 208. In dorsal (A 1, B1), rostral (A 2, B2), ventral (A 3, B3), lateral (A 4, B4), rostromedial (A 5, B5), medial (A 6, B6), and caudal (A 7, B7) views.