Genus
Valid Extinct

Bicharracosaurus

Reutter et al. 2026

Bicharracosaurus is a genus of macronarian sauropod dinosaur, possibly a brachiosaurid, that existed during the Late Jurassic of Cañadón Calcáreo Formation in what is now Argentina. The genus is monotypic with the type species being Bicharracosaurus dionidei.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
2
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Bicharracosaurus
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Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Saurischia Unranked clade
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Sauropodomorpha Unranked clade
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Massopoda Unranked clade
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Sauropodiformes Unranked clade
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Sauropoda Unranked clade
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Gravisauria Unranked clade
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Eusauropoda Unranked clade
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Neosauropoda Unranked clade
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Macronaria Unranked clade
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Bicharracosaurus Genus
Fossil sites 2 geolocated sites
Distribution
Top countries
🇦🇷 Argentina
2
Geological formations
Cañadón Calcáreo
2
Temporal distribution
Kimmeridgian (154.8–149.2 Ma)
1
Oxfordian (161.5–154.8 Ma)
1
Species (1)
Bicharracosaurus dionidei 162 Ma
News 1
This strange giant dinosaur may change what we know about Jurassic titans
Argentina Jurassic fossil Bicharracosaurus Brachiosauria +4
A bizarre new giant dinosaur discovered in Argentina is giving paleontologists a fresh look at how Jurassic titans evolved in the Southern Hemisphere. Bicharracosaurus dionidei stretched about 20 meters long and carried a strange mix of features seen in both Diplodocus and Brachiosaurus relatives. Scientists believe it could represent the first known Jurassic brachiosaurid from South America, helping fill a major gap in the dinosaur fossil record.
12/05/2026 sciencedaily
Images 2
Bibliography
Original description
A. Reutter, J. L. Carballido, and G. J. Windholz, D. Pol, O. W. Rauhut. 2026. 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. PeerJ 14(4443):e20945 DOI ↗
Bibliography (1)
A. Reutter, J. L. Carballido, and G. J. Windholz, D. Pol, O. W. Rauhut. 2026. 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. PeerJ 14(4443):e20945 DOI ↗