Genus
Valid Extinct

Tongnanlong

Wei et al. 2025

Tongnanlong is a genus of mamenchisaurid dinosaur from the Late Jurassic Suining Formation of Chongqing, China. The type species is Tongnanlong zhimingi.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
1
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Tongnanlong
click to enlarge
Tongnanlong is a large mamenchisaurid sauropod dinosaur that lived in the Late Jurassic period of what is now China. Typical of mamenchisaurids, it had an extremely long neck, even by sauropod standards. Tongnanlong grew to approximately 25 m in length and weighed 20-30 t, making it one of the largest mamenchisaurids. © TotalDino · CC BY 4.0 · 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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Mamenchisauridae Unranked clade
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Tongnanlong Genus
Fossil sites 1 geolocated sites
Distribution
Top countries
🇨🇳 China
1
Geological formations
Suining
1
Temporal distribution
Kimmeridgian (154.8–149.2 Ma)
1
Species (1)
Tongnanlong zhimingi 162 Ma
Images 1
Bibliography
Original description
X. Wei, Y. Tan, and S. Jiang, J. Ding, L. Li, X. Wang, Y. Liu, G. Wei, D. Li, Y. Liu, G. Peng, S. Zhang, C. Lao. 2025. A new mamenchisaurid from the Upper Jurassic Suining Formation of the Sichuan Basin in China and its implication on sauropod gigantism. Scientific Reports 15(1) DOI ↗
Bibliography (1)
X. Wei, Y. Tan, and S. Jiang, J. Ding, L. Li, X. Wang, Y. Liu, G. Wei, D. Li, Y. Liu, G. Peng, S. Zhang, C. Lao. 2025. A new mamenchisaurid from the Upper Jurassic Suining Formation of the Sichuan Basin in China and its implication on sauropod gigantism. Scientific Reports 15(1) DOI ↗