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Figure 6. Mid cervical vertebrae of the theropod Aerosteon riocoloradensis.

Cervical vertebrae 4 and 6 (MCNA-PV-3137; cast) in left lateral view. (A)-Cervical 4. (B)-Cervical 6. Scale bar equals 5 cm. Abbreviations: pa, parapophysis; pl, pleurocoel; se, septum.