Size comparisons

[JurassicDD]

Allosaurus fragilis by Franoys updated

*This image is copyright of its original author

Information on the update and the studies used to help create the diagram for those interested.

23/10/2021 A skeletal update that had to happen; and that actually demonstrates that scaling using scalebars can be misleading, so it is better to avoid when possible.

For quite some time I suspected the pelvic girdle seemed small; specially considering Gilmore's description of USNM 4734. But no matter what; scalebars kept giving that result so I gave up. However, I decided to actually superimpose the medial view of the ilium with the sacrals and adjusted it until all the scars for attachment of the transverse process of the sacral vertebrae, sacral ribs and said elements matched perfectly. So all that region got upscaled by aprox 7,1% and now it has a deeper torso.

I also made other changes while at it; inspired by Evers et al 2020 and their study on the cheek configuration of Allosaurus' skull, and some minor other stuff.

Studies used.
Madsen Jr, J. H. (1976). Allosaurus fragilis: a revised osteology. Utah Geological and Mining Survey Bulletin, 109, 1-163.

Gilmore, Charles W. (1920). "Osteology of the carnivorous dinosauria in the United States National Museum, with special reference to the genera Antrodemus (Allosaurus) and Ceratosaurus". Bulletin of the United States National Museum. 110: 1–159. doi:10.5479/si.03629236.110.i. Reply