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long-neck giant
Bicharracosaurus
Say it like this: “bee-chah-RAH-koh-SOR-us”
Bicharracosaurus dionidei
Bicharracosaurus ate plants and walked on four legs. It lived in the Late Jurassic. Bones have been found in Argentina.
- When
- Late Jurassic (Oxfordian · Kimmeridgian) · roughly 161.5 to 149.2 million years ago
- Named in
- 2026 · Reutter, A.; Carballido, J. L.; Windholz, G. J.; Pol, D.; Rauhut, O. W. M.
- Hip height
- Not established
- Length
- Not established
- Weight
- Not established
- Found in
- Argentina · Cañadón Calcáreo
- Food and walking
- Herbivore · Four legs
- Kind
- long-neck giant · Sauropod
- Family branch
- Macronaria
The story in short
Bicharracosaurus was formally named in 2026 by A. Reutter and colleagues.
It lived in the Late Jurassic (Oxfordian · Kimmeridgian), roughly 161.5 to 149.2 million years ago. Finds come from Argentina, including the Cañadón Calcáreo Formation. It was a herbivore and walked on four legs.
The fossils of Bicharracosaurus are too incomplete for a responsible length, hip height, or weight, so those fields are left blank on purpose.
On the family tree it sits in Macronaria, among the sauropod dinosaurs.
Close relatives
Abrosaurus
Abrosaurus dongpoi
Middle Jurassic · Late Jurassic (Bajocian–Oxfordian) · roughly 170.9 to 154.8 million years ago
Aragosaurus
Aragosaurus ischiaticus
Late Jurassic · Early Cretaceous (Tithonian · Berriasian) · roughly 149.2 to 137.1 million years ago
Astrodon
Astrodon johnstoni
Early Cretaceous (Aptian · Albian) · roughly 121.4 to 100.5 million years ago