Figure 1 | Scientific Reports

Figure 1

From: The absence of an invasive air sac system in the earliest dinosaurs suggests multiple origins of vertebral pneumaticity

Figure 1

Examples of vertebrae with apneumatic (A–F) and pneumatic (G–L) architectures, and schematic drawings of vertebral fossae and laminae in (M and N). (A,B) Varanus komodoensis (NHMUK RR 1934.9.2.2)15. (C,D) Alligator mississippiensis (OUVC 11415 and NHMUK RR 1975.14.23, respectively). (E) Odocoeileus virginianus. (F) Bos taurus. (G,H) Apatosaurus sp. (MOR 957 6-29-92)35. (I,J) noasauridae indet. (DGM 929-R)36. (K,L) Ibirania parva (LPP-PV-0200)37. (M,N) Dilophosaurus wetherilli38. Lateral view in (A,C,F,I,L,N). Transverse sections in (B,D,E,J,K,M). Ventral view in (G). High contrast outlines in A-D and G-L based on CT scan data. (M and N) are based on the original schematic drawing of Adam Marsh38. WitmerLab at Ohio University provided access to the Alligator data originally appearing on their website, the collection of which was funded by NSF. The file was downloaded from www.MorphoSource.org, Duke University. Not to scale. Figures were generated with Adobe Illustrator CC version 22 X64.

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