AMARGASAURUS: classification and Habitat and more.

Scientific classification

In this article, we’ll explore the fascinating Amargasaurus, a dinosaur that once roamed the ancient landscapes. Known for its distinct features and intriguing behavior, Amargasaurus continues to captivate the curiosity of paleontologists and dinosaur enthusiasts alike.


Amargasaurus belongs to the Sauropod family, a group of long-necked, herbivorous dinosaurs that lived during the Late Jurassic period, approximately 163 to 151 million years ago. Within the Sauropod family, Amargasaurus falls into the Dicraeosauridae family, characterized by their shorter necks compared to other sauropods.

Quick Facts

  • Name: Amargasaurus
  • Period: Late Jurassic
  • Length: Around 33-39 feet (10-12 meters)
  • Height: Approximately 13 feet (4 meters)
  • Weight: Roughly 2.5 to 3.5 tons
  • Unique Feature: Double row of spines along the neck and back


Amargasaurus is best known for its remarkable appearance, featuring two parallel rows of tall, sail-like spines running along its neck and back. These spines, which likely supported a skin structure, provided a striking display and might have played a role in communication or thermoregulation. Its long neck and tail helped balance its massive body and reach vegetation in tall trees.

Distribution and Habitat

The fossils of Amargasaurus have been found in the La Amarga Formation of Argentina. This suggests that the dinosaur inhabited the lush forests and riverine environments of present-day South America during the Late Jurassic. The region offered an abundance of plant life, making it an ideal habitat for herbivorous dinosaurs like Amargasaurus.

Biology of Amargasaurus

The unique feature of the double spines sets Amargasaurus apart from other dinosaurs. The elongated neck allowed it to feed on vegetation high in the treetops, granting access to a diverse range of plants. Its strong, sturdy legs and massive body enabled it to support its weight and navigate through the dense vegetation with ease.


Amargasaurus is believed to have lived in herds, a common behavior among sauropods. By congregating in groups, they could defend against predators more effectively and find ample food resources. Their long necks and ability to reach high vegetation likely reduced competition with other herbivores, enhancing their survival chances.


As a herbivorous dinosaur, Amargasaurus primarily subsisted on ferns, cycads, and conifers. Its unique neck adaptation allowed it to exploit the upper canopy of the forests, where it could access a variety of nutritious plant sources not accessible to many other herbivores.


Estimating the exact lifespan of dinosaurs can be challenging, but based on modern-day comparisons, it is believed that Amargasaurus had a life span of approximately 30 to 40 years.


Fossil evidence doesn’t provide comprehensive insights into Amargasaurus’ reproductive behavior, but researchers speculate that like other sauropods, it laid eggs in nests and cared for their young, providing them with protection until they were capable of fending for themselves.


Relationship with Humans

Since Amargasaurus existed millions of years before humans, there were no direct interactions between the two. However, the discovery of its fossils continues to provide valuable insights into the prehistoric world, allowing us to understand better the rich diversity of life that once inhabited our planet.


During the Late Jurassic, Amargasaurus coexisted with several carnivorous dinosaurs, including the fearsome Allosaurus. Its size and the herding behavior likely acted as a deterrent against potential predators, but like all creatures, it faced threats from these carnivorous giants.


In conclusion, Amargasaurus stands as a captivating example of the incredible diversity that once graced our planet. Its unique appearance, including the double row of spines, makes it a subject of fascination among researchers and dinosaur enthusiasts. Amargasaurus’ ability to thrive in its lush, ancient habitat showcases the adaptive brilliance of prehistoric life forms. As we continue to uncover more about this marvelous dinosaur through fossils and scientific research, we gain valuable insights into the wonders of Earth’s history.

Remember to explore the other captivating articles on Animal Planetory for more fascinating discoveries from the animal kingdom. We hope this article has ignited your curiosity about the magnificent Amargasaurus and its enthralling existence.


What was the purpose of the spines on Amargasaurus’ neck and back?

The spines on Amargasaurus’ neck and back are a distinctive feature, but their exact purpose remains a subject of debate among scientists. They might have been used for display during courtship rituals or territorial disputes. Another possibility is that these spines supported a skin structure, similar to the sail of a Dimetrodon, helping regulate body temperature.

How large was Amargasaurus compared to other sauropods?

Amargasaurus was relatively small compared to some of the more well-known sauropods like Brachiosaurus and Diplodocus. With a length of around 33-39 feet and a height of approximately 13 feet, it falls on the smaller end of the sauropod size spectrum.

Were Amargasaurus’ spines made of bone or a different material?

The spines on Amargasaurus were most likely extensions of its vertebrae, made of bone. However, they may have been covered in a keratin sheath, similar to the horns of modern-day animals, which could have enhanced their visual display.

Did Amargasaurus walk on all fours or only on its hind legs?

Amargasaurus, like other sauropods, was quadrupedal, meaning it walked on all four legs. Its sturdy limbs and massive body made this stance necessary for supporting its weight and navigating through its habitat.


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