Bajadasaurus Facts
Pronunciation: bah-HAH-dah-SORE-us
Name meaning: Bajada lizard (after the Bajada Colorada Formation)
| Diet | Herbivore |
| Height | 3m |
| Length | 9m |
| Weight | 4 tonnes |
| Environment | Land |
| Era | Cretaceous |
| Period | Early Cretaceous |
| Type | Sauropod |
| Location | Argentina |
Bajadasaurus was a remarkable sauropod dinosaur that lived in what is now northern Patagonia, Argentina, during the Early Cretaceous period around 139 million years ago. Unlike the massive, long-necked sauropods that many people imagine, Bajadasaurus was part of a group of relatively small, short-necked sauropods that developed some truly extraordinary features.
The most striking characteristic of Bajadasaurus was its incredible array of forward-pointing spines along its neck and back. These weren't just small bumps - they were long, defensive spikes that would have made this sauropod look rather like a walking porcupine. Scientists believe these spines were covered in a horny sheath, making them even more formidable weapons against predators.
As a herbivore, Bajadasaurus would have fed on the ferns, conifers, and other plants available in its Cretaceous environment. Its shorter neck compared to other sauropods suggests it was adapted to browse on lower-growing vegetation rather than reaching high into tree canopies. The dinosaur walked on four sturdy legs and had the typical long tail of sauropods, which it may have used for balance and possibly defence.
Our knowledge of Bajadasaurus comes from a remarkably well-preserved specimen discovered in 2010, including a largely complete skull and neck vertebrae. This exceptional fossil has provided scientists with unprecedented insights into the anatomy and lifestyle of these spiky sauropods.
What made Bajadasaurus distinctive?
Bajadasaurus was instantly recognisable by its extraordinary array of long, forward-pointing defensive spines running along its neck and back, giving it an almost porcupine-like appearance. It had a relatively short neck for a sauropod and a robust, well-preserved skull that shows detailed anatomical features.
Behaviour
Bajadasaurus likely used its impressive defensive spines as protection against predators, possibly lowering its head to present a formidable barrier of spikes when threatened. As a herbivore with a shorter neck, it would have browsed on lower vegetation rather than stretching up to tall trees like its longer-necked relatives.
Discovery
Bajadasaurus was first described by Pablo Gallina and colleagues in 2019. The original fossils were discovered at Bajada Colorada Formation, Neuquén Province, Argentina.
Bajadasaurus FAQ
What did Bajadasaurus eat?
Bajadasaurus was a herbivore that fed on the plants available in its
Early Cretaceous environment, including ferns, conifers, and other vegetation. Its shorter neck suggests it browsed on lower-growing plants rather than reaching high into tree canopies like some other sauropods.
How big was Bajadasaurus?
Bajadasaurus was about 9 metres long and stood approximately 3 metres tall at the hip, weighing around 4 tonnes. This made it relatively small for a sauropod, especially compared to giants like
Argentinosaurus or
Brontosaurus.
When did Bajadasaurus live?
Bajadasaurus lived during the
Early Cretaceous period, specifically around 139.1 million years ago. This places it in an era when flowering plants were just beginning to evolve and dinosaurs were diversifying rapidly.
Where was Bajadasaurus found?
Bajadasaurus was discovered in the Bajada Colorada Formation in Neuquén Province, northern Patagonia, Argentina. The fossil was found in 2010 and described by scientists in 2019.
How do you pronounce Bajadasaurus?
Bajadasaurus is pronounced 'bah-HAH-dah-SORE-us'. The name comes from the Bajada Colorada Formation where it was discovered, combined with the Greek word 'saurus' meaning lizard.
What does Bajadasaurus mean?
Bajadasaurus means 'Bajada lizard', named after the Bajada Colorada Formation in Argentina where it was discovered. The species name 'pronuspinax' refers to its forward-leaning defensive spines.
How fast could Bajadasaurus run?
Like most sauropods, Bajadasaurus was not built for speed. As a large, quadrupedal herbivore, it would have moved at a relatively slow walking pace, relying on its defensive spines rather than speed to deter predators.
What type of dinosaur was Bajadasaurus?
Bajadasaurus was a sauropod dinosaur, specifically a member of the Dicraeosauridae family. This group consisted of relatively small, short-necked sauropods that were quite different from the massive long-necked giants that many people associate with sauropods.
Was Bajadasaurus related to birds?
As a sauropod, Bajadasaurus was not closely related to birds. Birds evolved from theropod dinosaurs, while Bajadasaurus belonged to a completely different group. However, like all dinosaurs, Bajadasaurus shared a common ancestor with birds much further back in evolutionary history.
How many Bajadasaurus fossils have been found?
Bajadasaurus is known from a single, remarkably well-preserved specimen that includes a largely complete skull and parts of the neck vertebrae. This fossil was discovered in 2010 and represents one of the most complete skulls known for the Dicraeosauridae family.
