Brachiosaurus is a genus of sauropod dinosaur that lived in North America during the Late Jurassic, about 154–153 million years ago. It was first described by American paleontologist Elmer S. Riggs in 1903 from fossils found in the Colorado River valley in western Colorado, United States.

Short Brachiosaurus Facts

  • Their names mean “arm lizards”
  • They weighed as much 4 elephants, from 35 to 90 tons.
  • They stood over 2 ½ stories high
  • They were as long as 2 railroad cars, Length 30m, Height 23m
  • They lived in North America, Algeria, Portugal, and Tanzania
  • Upper Jurassic Period
Brachiosaurus size

More About Brachiosaurus

The Brachiosaurus is a dinosaur which lived about 156 million years ago during the Jurassic Period. They were massive animals that stood about 23 feet high, were 85 feet long and weighed between 30 through 80 tons. The first remains of this dinosaur were discovered in 1903 by Elmer S. Riggs in Western Colorado.

Brachiosaurus is known for its long neck—which made it look very much like a giraffe—and its short hindlegs. The front legs of this dinosaur is so much larger than the hind legs, it caused Mr. Riggs to name it Brachiosaurus—a name which means “arm lizard”.

It is believed that these massive animals were warm blooded and not cold blooded like most reptiles. Scientists have been able to determine this by examining the teeth of these animals and calculating body temperature of the dinosaur by measuring the ratios of certain isotopes.

These dinosaurs are known to have been herbivores. It is believed that they subsisted mainly on conifers, ginkgos and cycads.

Brachiosaurus is the namesake genus of the family Brachiosauridae, which includes a handful of other similar sauropods. Most popular depictions of Brachiosaurus are in fact based on Giraffatitan, a genus of brachiosaurid dinosaur from the Tendaguru Formation of Tanzania. Three other species of Brachiosaurus have been named based on fossils found in Africa and Europe; two are no longer considered valid, and a third has become a separate genus, Lusotitan.

Brachiosaurus feeding

The Brachiosaurus was herbivorous and fed on leaves. Its long neck allowed it to be taken directly from the top of the tree canopy. Due to its large size, it had to ingest large amounts, which would be a problem when changes in the climate happened and the vegetation and therefore the amount of food available were affected.

The exact amount of food he needed has yet to be determined exactly. And it has not been determined if his blood was hot or cold. In the case of being cold, it would have needed few amounts to cover its energy demands, on the contrary if they were endothermic. If the latter was the case, it is likely that they ingested more than 182 kilograms of food per day.

Also read: “Bigfoot”: Researchers Report The World’s Largest Dinosaur Foot

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