Saltasaurus
Saltasaurus was small for a sauropod (long-necked dinosaur), but still reached a respectable length of nearly 30 feet long. It lived in the Late Cretaceous, around 70 million years ago, and had a rotund body covered in bony osteoderms.
Classification: Saurischia. Sauropodmorpha. Sauropoda. Titanosauria. Saltasauridae.
Genus: Saltasaurus (“Lizard from Salta [a province in Argentina]”)
Species: S. loricatus
Saltasaurus, like other sauropods, was a plant eater. During the period that it lived, the Late Cretaceous, sauropods in many regions were no longer as prominent as they had been in the Jurassic Period, having been replaced by ceratopsian dinosaurs and duck-billed ornithopods. However, sauropods continued to develop into the Late Cretaceous in places like Africa, and in South America, where Saltasaurus was found.
Saltasaurus’s crocodile-like bone armor may have dissuaded predators from attacking it. Previously, scientists had assumed that the large size of sauropods was enough to keep most predators at bay. Saltasaurus cast some doubt on this claim. However, it should be noted that Saltasaurus, while not a small dinosaur, was much smaller than most other sauropods. Patagotitan, another titanosaur, is thought to have reached a length of over 100 feet.
Saltasaurus was a sauropod, and followed the typical sauropod body template - four thick legs, a long neck, and a long tail. Its body was wide and rotund, and covered in bony osteoderms. Osteoderms are not scales, but bones, and they could have provided Saltasaurus with armor-like protection from predators. Similar bony armor has been found in other sauropods, including Malawisaurus.
LENGTH: 28 feet (8.5 meters)
WEIGHT: 2.8 short tons (2.5 tonnes)
Saltasaurus was discovered by Jose Bonapart, Martin Vince and Juan C. Leal in the Salta Province of northwestern Argentina. This region would give the dinosaur its name.
The known remains belong to several individuals, and included osteoderms and teeth, as well as bones from the neck, back, tail and limbs.
Another dinosaur discovered in Argnetina’s Neuquen Province was believed to be another species of Saltasaurus, but was later classified as the closely related Neuquenosaurus.
Titanosaur nesting sites have been discovered in Patagonia, with preserved eggs showing embryos with tiny scales that resemble the bony osteoderms of Saltasaurus.
References:
https://en.wikipedia.org/wiki/Saltasaurus
Paul, G. (2024). The Princeton Field Guide to Dinosaurs, 3rd Edition. Princeton, New Jersey: University Press Princeton.
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