Image: Pneumatopores on the left ilium of the theropod Aerosteon riocoloradensis

Description: Original caption: "Figure 14. Pneumatopores on the left ilium of the theropod Aerosteon riocoloradensis. Detail views of the left ilium (MCNA-PV-3137). (A)-Pneumatopores on the base of the preacetabular process in lateral view. (B)-Pneumatopores on the central iliac blade in medial view. (C)-Stereopairs of the pubic peduncle in lateral view showing pneumatopore complex. (D)-Pneumatopores on the brevis fossa of the postacetabular process in ventral view; largest pneumatopore (4 cm in transverse diameter) opens posteriorly (to the right) just posterior to five smaller ventrally-facing pneumatopores (marked). A, B, and D are from a cast of MCNA-PV-3137 to reduce color distraction. Scale bars equal 5 cm in A and 10 cm in B, C and D. Arrows point to pneumatopores."
Title: Pneumatopores on the left ilium of the theropod Aerosteon riocoloradensis
Credit: Sereno PC, Martinez RN, Wilson JA, Varricchio DJ, Alcober OA, et al. (Sept 2008). "Evidence for Avian Intrathoracic Air Sacs in a New Predatory Dinosaur from Argentina". PLoS ONE 3(9): e3303.
Author: Sereno PC, Martinez RN, Wilson JA, Varricchio DJ, Alcober OA, et al.
Permission: "© 2008 Sereno et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited."
Usage Terms: Creative Commons Attribution 2.5
License: CC BY 2.5
License Link: http://creativecommons.org/licenses/by/2.5
Attribution Required?: Yes