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I have updated my Andesaurus image again, based on the research in Mannion and Calvo (2011). New restorations of arm material and ribs, and upgraded vertebrae, hips, tail, everything. Jorge Calvo himself was co-author (along with Argentina's "Godfather of Paleontology" Jose Bonaparte) of the original description paper for Andesaurus in 1991. So it's interested to see how his view of Andesaurus and its relatives has changed. One thing is sure, the new paper has MUCH more good visual material than the old one. Actual photographs of many of the bones, in high resolution, which uncover some major problems in the original drawings, and even more so those in Salgado and Calvo (1997) which illustrated an anterior caudal far too big (probably an error incurred through compiling such a large monochrome paper with such admittedly cheap, smoothed out line drawings). We end up with a shorter-tailed, higher-shouldered Andesaurus than before, which fits with its position as a basal titanosaur intermediate to euhelopodids/acrofornicans and intermediate titanosaurs like lognkosaurians. The tail is also considerably thinner than the isolated line drawings in Salgado and Calvo (1997) misled us to believe.

So that means with its smaller tail, Andesaurus is even smaller than previously estimated. Read it and weep, Dougal Dixon. :XD:
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Submitted on
December 24, 2014


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