Gigantic Plant-Eating Dinosaur Unearthed in Patagonia

Bruhathkayosaurus ?44 m 144 ft Titanosaur

Using the humerotibial ratio of Aegyptosaurus, we can estimate Bruhath-kayosaurus' humerus was 2.34 meters long. This is 30% larger than estimatated for Argentinosaurus (1.81 m) and 39% larger than Paralititan (1.69 m). Tibia length was 29% larger than that of Argentinosaurus (1.55 m).
Based on the estimated mass Bruhathkayosaurus may have weighed 175-220 tons. There is difficulty in establishing the identity of the animal from what remains and Dinosauricon goes as far as to suggest that there is no certainty that it is even animalian.

Seismosaurus ?45 m 148 ft Diplodocid

The remains of this animal include vertebrae, partial pelvis, chevrons, ribs and indicate it was one of the largest animals ever. Size estimates range from 40 to 50 metres.

Supersaurus ?40 m 131 ft Diplodocid

This diplodocid is known from fragmentary remains: one cervical vertebra, several dorsals, a few cordals and a scapulocoracoid. The cervical is 1.35m long and, compared to 0.6m Diplodocus suggests Supersaurus's neck was 2.25 times as long. The Diplodocus has a six-meter neck, which suggests a neck of 13.5m for Supersaurus. The whole animal was not 2.25 times as long as Diplodocus because the height of its dorsal vertebrae is 1.5 times that of Diplodocus's, suggesting that the neck of Supersaurus was disproportionately long for its body, with a weight in the region of 40-50 tons.

Argentinasaurus 35 m Titanosaur

The sacrum, vertebrae and tibia that we have indicate that it is a member of the titanosaur family, and comparison with better-known titanosaur genera give us a good indication of its scale, suggesting a total length of 35m or longer. Given the bulkiness of titanosaurs, its likely weight was in the region of 80-100 tons.

No, it isn't any of the above, but is yet another of the "new" giants that are being found at a record pace.

"At more than 105 feet, it is among the largest ever found, scientists said Monday.

Scientists from Argentina and Brazil said the Patagonian dinosaur appears to represent a previously unknown species because of the unique structure of its neck.

They named it Futalognkosaurus dukei after the Mapuche Indian words for "giant" and "chief," and for Duke Energy Argentina, which helped fund the skeleton's excavation.

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