A size comparison of three femurs (thigh bones) that were assigned to the sauropod dinosaur genus Antarctosaurus by Friedrich von Huene in 1929. 
• MACN 6904 is part of the type specimen of Antarctosaurus wichmannianus and measures 1.39 meters long. [1]
• FNMH P13019 was also assigned to Antarctosaurus wichmannianus by Huene but later authors think it belongs to either Argyrosaurus or an indeterminate titanosaur.[2] It measures 1.85 meters long.[1]
• MLP 23-316 is part of the type specimen of Antarctosaurus giganteus and is one of the longest femurs known, measuring 2.35 meters in length.[1] Huene tentatively referred A.giganteus to the genus Antarctosaurus and other authors doubt the referral with some thinking it belongs to an as yet unnamed genus. [3][4]
• The femurs are based on illustrations in Huene 1929. [1]
• Humans scaled to 170 cm and 160 cm respectively.References

↑ a b c d von Huene, F. 1929. Los saurisquios y ornitisquios del Cretacéo Argentino. Anales del Museo de La Plata (series 3) 3: 1–196. [In Spanish]

↑ Mannion, Philip D. (2012). "A Reappraisal of the Late Cretaceous Argentinean Sauropod Dinosaur Argyrosaurus superbus, with a Description of a New Titanosaur Genus". Journal of Vertebrate Paleontology 32:3: 614-638.

↑ Upchurch, P., Barrett, P.M, &amp; Dodson, P. 2004. Sauropoda. In: Weishampel, D.B., Dodson, P., &amp; Osmolska, H. (Eds.). The Dinosauria (2nd Edition). Berkeley: University of California Press. Pp. 259-322.

↑ Eduardo., Powell, Jaime (2003)       Revision of South American titanosaurid dinosaurs : palaeobiological, palaeobiogeographical and phylogenetic aspects, Queen Victoria Museum and Art Gallery  OCLC:   52391340.
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