Extended Data Fig. 3: CT data of the proatlas and atlas in the Chicago Archaeopteryx and the comparative anatomy of the proatlas and atlas (atlas intercentrum and neurapophyses) in paravians.
From: Chicago Archaeopteryx informs on the early evolution of the avian bauplan
Elements, all figured in right lateral view, are to scale relative to each other but not between taxa. The proatlas is colored olive green; the atlas neurapophysis is pink; the atlas intercentrum is light green. Sinovenator is based on PMOL (Paleontology Museum of Liaoning) -AD00102; Tsaagan is based on IGM, Institute of Geology, Mongolian Academy of Sciences, 100/105; and Deinonychus is based on YPM, Yale Peabody Museum, 5210. Dashed lines indicate poor preservation. Fused atlas (only right neurapophysis could be reconstructed) in Archaeopteryx FMNH PA 830 in caudal (a) and cranial (b) view; right proatlas in lateral (c), medial (d), caudal (e), and cranial (f) view.
