Unranked clade

Valid Extinct

Diamantinasauria

Poropat et al. 2021

Diamantinasauria is an extinct clade of somphospondylan titanosauriform sauropod dinosaurs with close affinities to the Titanosauria, known from the early Late Cretaceous (Cenomanian-Turonian) of South America and Australia. It was named by Poropat and colleagues in 2021, and contains four genera: Australotitan, Savannasaurus and Diamantinasaurus from the Winton Formation of Queensland, as well as Sarmientosaurus from the Bajo Barreal Formation of Patagonia. The existence of the clade indicates connectivity between Australia and South America via Antarctica during the Cretaceous period.

Temporal range

Triassic

Jurassic

Cretaceous

Paleogene

Neogene

252 201 145 66 0 Ma

PBDB occurrences

Group

Dinosaures

Herbivore Ground dwelling, gregarious Terrestrial

click to enlarge

Cranium of Sarmientosaurus musacchioi gen. et sp. nov. (MDT-PV 2). Photographs (A, C) and interpretive drawing (B) in right lateral (A, B) and left lateral (C) views. Abbreviations see text. Scale bar = 10 cm. © Rubén D. F. Martínez ,Matthew C. Lamanna,Fernando E. Novas,Ryan C. Ridgely,Gabriel A. Casal,Javier E. Martínez,Javier R. Vita,Lawrence M. Witmer · CC BY 2.5 · 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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Titanosauriformes Unranked clade

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Somphospondyli Unranked clade

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Diamantinasauria Unranked clade

Fossil sites 28 geolocated sites

Distribution

Top countries

🇦🇺 Australia

🇦🇷 Argentina

🇪🇬 Egypt

Geological formations

Winton

Bajo Barreal

Quseir

Temporal distribution

Campanian (83.6–72.2 Ma)

Cenomanian (100.5–93.9 Ma)

Synonyms (1)

Australotitan cooperensis nomen dubium, species not entered Diamantinasauria

News 1

Diamantinasaurus: Beast of the Week

Australia Cretaceous Diamantinasauria Dinosauria

This week we'll be learning about a beast that greatly helps us understand how sauropod dinosaurs ("long-necks") looked and lived. Check out Diamantinasaurus matildae!Diamantinasaurus lived in what is now Queensland, Australia during the middle Cretaceous period, between 95 and 92 million years ago. It's considered medium-sized for a sauropod, and would have measured about 52 feet (16m) long from snout to tail. (Yes. 52 feet is only medium for sauropods!) Like all sauropods it would have eaten

12/04/2026 prehistoricbeastoftheweek

Images 2

Bibliography

Original description

S. F. Poropat, M. Kundrát, and P. D. Mannion, P. Upchurch, T. T. Tischler, D. A. Elliott. 2021. Second specimen of the Late Cretaceous Australian sauropod dinosaur Diamantinasaurus matildae provides new anatomical information on the skull and neck of early titanosaurs. Zoological Journal of the Linnean Society 192:610-674 DOI ↗

Bibliography (9)

S. L. Beeston, S. F. Poropat, and P. D. Mannion, A. H. Pentland, M. J. Enchelmaier, T. Sloan, D. A. Elliott. 2024. Reappraisal of sauropod dinosaur diversity in the Upper Cretaceous Winton Formation of Queensland, Australia, through 3D digitisation and description of new specimens. PeerJ 12:e17180 DOI ↗

S. F. Poropat, P. D. Mannion, and S. L. Rigby, R. J. Duncan, A. H. Pentland, J. J. Bevitt, T. Sloan, D. A. Elliott. 2023. A nearly complete skull of the sauropod dinosaur Diamantinasaurus matildae from the Upper Cretaceous Winton Formation of Australia and implications for the early evolution of titanosaurs. Royal Society Open Science 10:221618:1-74 DOI ↗

S. F. Poropat, T. G. Frauenfelder, and P. D. Mannion, S. L. Rigby, A. H. Pentland, T. Sloan, D. A. Elliott. 2022. Sauropod dinosaur teeth from the lower Upper Cretaceous Winton Formation of Queensland, Australia and the global record of early titanosauriforms. Royal Society Open Science 9:220381 DOI ↗

S. A. Hocknull, M. Wilkinson, and R. A. Lawrence, V. Konstantinov, S. Mackenzie, R. Mackenzie. 2021. A new giant sauropod, Australotitan cooperensis gen. et sp. nov., from the mid-Cretaceous of Australia. PeerJ 9:e11317:1-130 DOI ↗

S. L. Rigby, S. F. Poropat, and P. D. Mannion, A. H. Pentland, T. Sloan, S. J. Rumbold, C. B. Webster, D. A. Elliott. 2021. A juvenile Diamantinasaurus matildae (Dinosauria: Titanosauria) from the Upper Cretaceous Winton Formation of Queensland, Australia, with implications for sauropod ontogeny. Journal of Vertebrate Paleontology 41(6):e2047991:1-20 DOI ↗

H. M. Sallam, E. Gorscak, and P. M. O.'Connor, I. A. El-Dawoudi, S. El-Sayed, S. Saber, M. A. Kora, J. J. W. Sertich, E. R. Seiffert, M. C. Lamanna. 2018. New Egyptian sauropod reveals Late Cretaceous dinosaur dispersal between Europe and Africa. Nature Ecology & Evolution 2(3):445-451 DOI ↗

R. D. F. Martínez, M. C. Lamanna, and F. E. Novas, R. C. Ridgley, G. A. Casal, J. E. Martínez, J. R. Vita, L. M. Witmer. 2016. A basal lithostrotian titanosaur (Dinosauria: Sauropoda) with a complete skull: implications for the evolution and paleobiology of Titanosauria. PLoS ONE 11(4):e0151661:1-82 DOI ↗

S. F. Poropat, P. D. Mannion, and P. Upchurch, S. A. Hocknull, B. P. Kear, M. Kundrát, T. R. Tischler, T. Sloan, G. H. K. Sinapius, J. A. Elliott, D. A. Elliott. 2016. New Australian sauropods shed light on Cretaceous dinosaur palaeobiogeography. Scientific Reports 6:34467:1-12 DOI ↗

S. A. Hocknull, M. A. White, and T. R. Tischler, A. G. Cook, N. D. Calleja, T. Sloan, D. A. Elliot. 2009. New mid-Cretaceous (latest Albian) dinosaurs from Winton, Queensland, Australia. PLoS ONE 4(7):e6190: 1-51 DOI ↗

Diamantinasauria

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