Fig. 31 in Morphology, Phylogenetic Taxonomy, And Systematics Of Ichthyornis And Apatornis (Avialae: Ornithurae)

Fig. 31. The teeth and alveoli of Ichthyornis dispar: (A) the right mandible of YPM 1735 in medial view with measurements of the length of alveoli in anterior (left) and posterior (right) parts of the jaw fragment; (B) a mid tooth­row portion of the left mandible of YPM 1450 in medial (top) and lateral (bottom) views; (C) a developing tooth in the sixth alveolus from the posterior end of the dentary (YPM 1450; the tooth appears foreshortened as a result of the oblique dorsal view); (D) the posterior portion of the tooth row in YPM 1749 with the length of a representative alveolus.