Fig. 52 in Morphology, Phylogenetic Taxonomy, And Systematics Of Ichthyornis And Apatornis (Avialae: Ornithurae)

Fig. 52. The ulna of Ichthyornis dispar: (A) the right ulna of the Ichthyornis dispar holotype (YPM 1450), (B) the right ulna of the Ichthyornis validus holotype (YPM 1740), and (C) the left ulna of YPM 1453 (which was incorporated into the ''Ichthyornis victor'' panel mount) in ventral view.