Fig. 40 in Morphology, Phylogenetic Taxonomy, And Systematics Of Ichthyornis And Apatornis (Avialae: Ornithurae)

Fig. 40. Presacral vertebrae of Ichthyornis dispar. Two posterior cervical vertebrae from the holotype specimen (YPM 1450) referred to in the text as (A) 1450A and (B) 1450B are shown in right lateral and anterior views, respectively. An anterior thoracic from YPM 1450 (C) referred to as 1450C and (D) the posteriormost thoracic of YPM 1732 (1732C) are also shown in right lateral view. The identification of 1732C identification as the last presacral is based on notes (Marsh, 1880) indicating that it was discovered in articulation with the sacrum.