Fig. 6 in Morphology, Phylogenetic Taxonomy, And Systematics Of Ichthyornis And Apatornis (Avialae: Ornithurae)

Fig. 6. Size and stratigraphic position of individuals referred to Ichthyornis dispar interpreted as anagenetic change. Data points represent total humerus length of the indicated specimen(s) in millimeters. The relative size of specimens without data points, those lacking complete humeri, was estimated (i.e., YPM 1738, 1765, SMM 2139, USNM 22820, TMM 42522–1, and Cenomanian specimens, SMNH P2077.67, SMNH P2077.111, SMNH P2077.112, SMNH P2487.5). Shaded regions indicate size variation for each time period interpreted as anagenetic change in a single lineage.