Cathartesaura (Cretaceous rebbachisaur, Argentina) extremely thin ilium

[Ben Creisler]

Ben Creisler

bcre...@gmail.com

A new paper:

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Lucas N. Lerzo &Pablo A. Gallina (2025)
The extremely thin ilium of the sauropod dinosaur Cathartesaura anaerobica Gallina and Apesteguía 2005 (Sauropoda, Diplodocoidea) with comments on the pneumatization of the rebbachisaurid hip
HIstorical Biology (advance online publication)
doi: https://doi.org/10.1080/08912963.2025.2482168
https://www.tandfonline.com/doi/full/10.1080/08912963.2025.2482168


Cathartesaura anaerobica (Gallina and Apesteguía 2005) is a rebbachisaur sauropod from Huincul Formation (upper Cenomanian-Turonian) of Río Negro province, Argentina. It is represented by a cervical vertebra, two caudal vertebrae, a scapula, an ilium and a femur. Here, we redescribe the left ilium of Cathartesaura. The ventral part of the pre-acetabular process, the pubic peduncle and the acetabular margin are robust while the iliac blade is extremely thin and laminar. The presence of several U-shaped depressions between the transverse processes on medial aspect are supporting the hypothesis that the diverticula of the abdominal air sac could invade the space within the sacral vertebrae and the ilium as was reported in Amazonsaurus, Tataouinea and Campananeyen. Cathartesaura was found at rocks of the Kokorkom paleodesert during the Cretaceous Thermal Maximum. It is very likely that the invasion of the abdominal air sac provides resistance to the extreme thin ilium during and/or also reduced bone density to decrease the energetic cost of locomotion as an advantage for warm climates as previously thought.

[Ben Creisler]

An editorial:

Free pdf:

Jack A. Cooper (2025)
A sauropod dinosaur with an unusually thin ilium
Historical Biology (advance online publication)
doi: https://doi.org/10.1080/08912963.2025.2492520
https://www.tandfonline.com/doi/full/10.1080/08912963.2025.2492520

Free pdf:
https://www.tandfonline.com/doi/epdf/10.1080/08912963.2025.2492520

[Gregory Paul]

Looking for pdf of the following --

Wang, X.; You, H.; Meng, Q.; Gao, C.; Chang, X.; Liu, J. (2007). "Dongbeititan dongi, the first sauropod dinosaur from the Lower Cretaceous Jehol Group of western Liaoning Province, China". Acta Geologica Sinica (English Edition). 81 (6): 911–916.

GSPaul

[Jerry Harris]

Here it is!

[Gregory Paul]

Thanks

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[Skye McDavid]

Here's the PDF

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Skye McDavid

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[Gregory Paul]

Thanks

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