Atlantosaurus Facts
Pronunciation: at-LAN-toe-SORE-us
Name meaning: Atlas Lizard
| Diet | Herbivore |
| Height | 4m |
| Length | 20m |
| Weight | 15 tonnes |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Sauropod |
| Location | North America |
Atlantosaurus was a large sauropod dinosaur that lived during the Late Jurassic period, approximately 157 to 145 million years ago. It holds the distinction of being the first sauropod ever formally described, making it a historically significant discovery in palaeontology. However, this early description came at a cost, as it was found during the infamous Bone Wars of the 19th century, when scientific rigour often took second place to the race for academic fame.
This massive herbivore would have roamed the ancient landscapes of what is now Colorado, USA. Like other sauropods, Atlantosaurus possessed the characteristic long neck and tail, along with a relatively small head and columnar legs to support its enormous bulk. Estimates suggest it reached lengths of around 20 metres and stood approximately 4 metres tall at the hip, weighing roughly 15 tonnes.
As a plant-eater, Atlantosaurus would have used its long neck to reach vegetation at various heights, from ground-level ferns to tall conifer trees. Its teeth were designed for stripping leaves rather than chewing, so it likely swallowed stones to help grind plant material in its stomach.
Unfortunately, the original fossil remains of Atlantosaurus are quite fragmentary, consisting mainly of vertebrae and limb bones. This has led many palaeontologists to consider it a dubious genus, as there isn't enough material to definitively distinguish it from other known sauropods of the same time period.
What made Atlantosaurus distinctive?
Due to the fragmentary nature of the fossils, no distinctive features can be confidently attributed to Atlantosaurus. The remains suggest a typical large sauropod with a long neck, long tail, and massive body supported by pillar-like legs.
Behaviour
Atlantosaurus likely lived in herds, as evidenced by sauropod trackways from the same period. It would have spent most of its time feeding, using its long neck to browse vegetation at different levels without moving its massive body frequently.
Discovery
Atlantosaurus was first described by Othniel Charles Marsh in 1877. The original fossils were discovered at Morrison Formation, Colorado, USA.
Atlantosaurus FAQ
What did Atlantosaurus eat?
Atlantosaurus was a herbivore that fed on various plants including ferns, cycads, and conifers. It used its long neck to reach vegetation at different heights and likely swallowed stones to help digest tough plant material in its stomach.
How big was Atlantosaurus?
Atlantosaurus was estimated to be about 20 metres long and 4 metres tall at the hip, weighing approximately 15 tonnes. However, these measurements are uncertain due to the fragmentary nature of the fossil remains.
When did Atlantosaurus live?
Atlantosaurus lived during the
Late Jurassic period, approximately 157 to 145 million years ago. This was a time when sauropods were at their peak diversity and abundance.
Where was Atlantosaurus found?
Atlantosaurus fossils were discovered in the Morrison Formation of Colorado, USA. This rock formation is famous for preserving many
Late Jurassic dinosaurs across the western United States.
How do you pronounce Atlantosaurus?
Atlantosaurus is pronounced 'at-LAN-toe-SORE-us'. The name comes from Atlas, the Greek Titan, combined with the Greek word 'saurus' meaning lizard.
What does Atlantosaurus mean?
Atlantosaurus means 'Atlas Lizard', named after Atlas, the Titan from Greek mythology who was condemned to hold up the heavens. This name reflects the dinosaur's enormous size and strength.
How fast could Atlantosaurus run?
The speed of Atlantosaurus is unknown, but like other large sauropods, it was likely a slow-moving animal. Its massive size and body structure suggest it moved at a walking pace rather than running.
What type of dinosaur was Atlantosaurus?
Atlantosaurus was a sauropod dinosaur, characterised by its long neck, long tail, small head, and massive body. However, it's considered a dubious genus due to insufficient fossil evidence to distinguish it from other sauropods.
Was Atlantosaurus related to birds?
Like all dinosaurs, Atlantosaurus was distantly related to modern birds. However, as a sauropod, it belonged to a different major group (Sauropodomorpha) than the theropods that gave rise to birds.
How many Atlantosaurus fossils have been found?
Very few Atlantosaurus fossils have been found - only some vertebrae and limb bones from the original 1877 discovery. The fragmentary nature of these remains is why many scientists consider it a dubious genus.
