Fig. 51 in Morphology, Phylogenetic Taxonomy, And Systematics Of Ichthyornis And Apatornis (Avialae: Ornithurae)

Fig. 51. Comparison of size and morphology of Ichthyornis dispar humeri: (top: distal humeri in anterior view; bottom: proximal humeri in posterior view): (A) YPM 1738, (B) YPM 1450, (C) YPM 1764, (D) YPM 1733, (E) YPM 1452, (F) YPM 1742. These specimens were previously identified as parts of three distinct species (see table 1) but are here referred to Ichthyornis dispar. The range in the height of the dorsal supracondylar process (top) and the size of the humeral head (bottom) appears to be continuous (see arrows).