Genus
Valid Extinct

Joaquinraptor

Ibiricu et al. 2025

Joaquinraptor is an extinct genus of megaraptorid theropod dinosaurs known from the Late Cretaceous Lago Colhué Huapi Formation of Argentina. The genus contains a single species, Joaquinraptor casali, representing the youngest definitive megaraptoran. It is known from a partially articulated, incomplete skeleton including vertebrae and bones of the skull, forelimbs and hindlimbs, and pectoral girdle, making it one of the most completely known members of the Megaraptora. It was likely at least 7 metres (23 ft) long.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
1
Group
Dinosaures
Carnivore Ground dwelling, solitary Terrestrial
Joaquinraptor
click to enlarge
Mandible of Joaquinraptor casali (in situ) © Marcelo Luna (photographer) · CC BY 2.5 ar · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Theropoda Unranked clade
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Neotheropoda Unranked clade
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Averostra Unranked clade
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Tetanurae Unranked clade
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Coelurosauria Unranked clade
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Megaraptora Unranked clade
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Megaraptoridae Family
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Joaquinraptor Genus
Fossil sites 1 geolocated sites
Distribution
Top countries
🇦🇷 Argentina
1
Geological formations
Lago Colhué Huapi
1
Temporal distribution
Maastrichtian (72.2–66 Ma)
1
Species (1)
Joaquinraptor casali 72 Ma
News 1
Oubliez le T. rex : ce dinosaure géant aux bras monstrueux pourrait bien avoir été encore plus terrifiant
Forget T. rex: This Giant Dinosaur With Monstrous Arms Might Have Been Even More Terrifying
predator Dinosauria Joaquinraptor excavation
Discovered in Patagonia after three seasons of excavations, Joaquinraptor casali redistributes the cards of paleontology. This one-ton predator with disproportionate arms made the T. rex look like a one-armed boxer. What if brute force wasn't the best weapon of the dinosaur age?
07/06/2026 futura-terre ⚙ Auto-translated
Images 1
Bibliography
Original description
L. M. Ibiricu, M. C. Lamanna, and B. N. Alvarez, I. A. Cerda, J. L. Caglianone, N. V. Cardozo, M. Luna, R. D. Martínez. 2025. Latest Cretaceous megaraptorid theropod dinosaur sheds light on megaraptoran evolution and palaeobiology. Nature Communications 16(8298):1-18 DOI ↗
Bibliography (1)
L. M. Ibiricu, M. C. Lamanna, and B. N. Alvarez, I. A. Cerda, J. L. Caglianone, N. V. Cardozo, M. Luna, R. D. Martínez. 2025. Latest Cretaceous megaraptorid theropod dinosaur sheds light on megaraptoran evolution and palaeobiology. Nature Communications 16(8298):1-18 DOI ↗