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In the last year, I decided to use phylogenetic bracketing to find out which of my titanosaur life reconstructions to add spike armor to. But now, with the new phylogenetic tree that came out with the Notocolossus description paper, things changed a bit...
Spatiotemporal calibration of the titanosaur osteoderm fossil record:
Red: bulb and root
Blue: scutes and ossicles
Green: Controversial elements
Grey: too fragmentary to interpret
Phylogenetic tree with extent of above armor types:
Dreadnoughtus and Puertasaurus are getting spikes now.
References/sources
Vidal, 2014, "Titanosaur Osteoderms from the Upper Cretaceous of Lo Hueco (Spain) and Their Implications on the Armor of Laurasian Titanosaurs"
B.J. Gonzales, 2016, "A gigantic new dinosaur from Argentina and the evolution of the sauropod hind foot"
Spatiotemporal calibration of the titanosaur osteoderm fossil record:
Red: bulb and root
Blue: scutes and ossicles
Green: Controversial elements
Grey: too fragmentary to interpret
Phylogenetic tree with extent of above armor types:
Dreadnoughtus and Puertasaurus are getting spikes now.
References/sources
Vidal, 2014, "Titanosaur Osteoderms from the Upper Cretaceous of Lo Hueco (Spain) and Their Implications on the Armor of Laurasian Titanosaurs"
B.J. Gonzales, 2016, "A gigantic new dinosaur from Argentina and the evolution of the sauropod hind foot"
Volumetric estimate for Giganotosaurus
I had performed a volumetric analysis on my Giganotosaurus carolinii reconstruction to see how voluminous and massive it might have been, well, my take on it. This also has implications for its lifestyle in regards to a certain hypothesis claiming allosauroids to be obligate scavengers... Full blogpost: https://thesauropodomorphlair.wordpress.com/2022/01/09/volumetric-estimate-for-giganotosaurus/
Edwin's two-beamed sauropod
The diplodocid taxon Dystylosaurus edwini has long been commonly assumed to be a synonym of Supersaurus. But does this long-held idea still really hold up? Full blogpost: https://thesauropodomorphlair.wordpress.com/2021/05/28/edwins-two-beamed-sauropod/
Size of the duck titans
My take on size estimations for adult Edmontosaurus annectens. Some of them got real big... Full blogpost: https://thesauropodomorphlair.wordpress.com/2021/02/10/size-of-the-duck-titans/
Tetrapod body densities and updated mass estimates
Haven't gotten out a blog post in a while. Sorry for the hiatus, but it took some time to get the hang of Wordpress' block editor. Without further ado, here's the new post. New published data on tetrapod body densities, and updates to my previous mass estimations. Full blogpost: https://thesauropodomorphlair.wordpress.com/2021/02/05/tetrapod-body-densities-and-updates-to-mass-estimations/
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Do you think basal-ish titanosaurs like Andesaurus or Agustinia had bulb-and-root type osteoderms?