Genus
Valid Extinct

Bicharracosaurus

Reutter et al. 2026

Bicharracosaurus is a genus of macronarian sauropod dinosaur, possibly a brachiosaurid, known from the Late Jurassic Cañadón Calcáreo Formation of Argentina. The genus contains a single species, 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
click to enlarge
Reconstruction of Bicharracosaurus dionidei (MPEF-PV 1730). Skeletal reconstruction showing preserved elements. Some ribs are depicted here as left elements for visual purposes. Image source credit: Silhouette based on Camarasaurus by Scott Hartman. © Alexandra Reutter et al. · CC BY 4.0 · Wikimedia
Bicharracosaurus
Bicharracosaurus
Bicharracosaurus
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 4
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):e20945:1-69 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):e20945:1-69 DOI ↗