Bicharracosaurus
Bicharracosaurus was a huge, long-necked plant-eater that lived in what is now Argentina. It had a long tail and walked on all fours, munching on leaves from tall trees.1
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Fun facts
Bicharracosaurus was named in 2026, making it a very recently discovered dinosaur.3
The name comes from 'bicharraco', an informal Spanish word for a big animal, used by the farmer who found the fossils.1
Its fossils include a partial backbone and a piece of the hip bone, found on a farm in Patagonia.1
Scientists think Bicharracosaurus was an adult when it died, based on the bones' internal structure.1
It lived during the Late Jurassic Period, about 157 to 150 million years ago.1
Bicharracosaurus is a macronarian, a group of sauropods that includes giants like Brachiosaurus.1
Most asked questions about Bicharracosaurus
?How big was Bicharracosaurus?
Bicharracosaurus was about 15 metres (49 feet) long and weighed around 20 tonnes (44,000 pounds).2
?What did Bicharracosaurus eat?
It was a plant-eater, munching on leaves from tall trees with its long neck.2
?When did Bicharracosaurus live?
It lived during the Late Jurassic Period, about 157 million years ago.21
?Where was Bicharracosaurus found?
Its fossils were discovered in Chubut Province, Argentina, on a farm near the Chubut River.2
?Is Bicharracosaurus a dinosaur?
Yes, Bicharracosaurus is a dinosaur. It is a macronarian sauropod, a long-necked plant-eater.2
?How was Bicharracosaurus discovered?
A local farmer named Dionide Mesa found the bones in 2001, and scientists dug them up between 2002 and 2018.2
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For dino experts
- Scientific name
- Bicharracosaurus
- Named by
- Reutter et al. 20263
- Group
- Long-necks
- Family / clade
- Macronaria3
- Classification
- Sauropodomorpha > Sauropoda > Macronaria3
- Age of the rocks
- 162 to 149 million years (Oxfordian / Kimmeridgian)3
- Rock formations
- Cañadón Calcáreo3
- Countries
- Argentina3
- Fossil records
- 2 in the Paleobiology Database3
- Discovery
- The fossils were found by farmer Dionide Mesa on his land in Chubut, Argentina. Scientists Reutter, Carballido, Windholz, Pol, and Rauhut named it Bicharracosaurus dionidei in 2026.1
- Still debated
- Scientists are not sure whether Bicharracosaurus was more closely related to Brachiosaurus or to other early macronarians like Tehuelchesaurus.1
Where the facts come from
- Bicharracosaurus dionidei, gen. et sp. nov., a new macronarian (Dinosauria, Sauropoda) from the Late Jurassic Cañadón Calcáreo Formation of Argentina and the problematic early evolution of macronarians - PMC (pmc.ncbi.nlm.nih.gov)
- Bicharracosaurus (en.wikipedia.org)
- Bicharracosaurus in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.
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