Tongnanlong, new mamenchisaurid sauropod from Upper Jurassic of China (free pdf)
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Ben Creisler
Jul 10, 2025, 11:39:20 AM7/10/25
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Ben Creisler
A new paper:
Xuefang Wei, Yuanjun Tan, Shan Jiang, Jun Ding, Lei Li, Xiaobing Wang, Yiyang Liu, Guangbiao Wei, Deliang Li, Yu Liu, Guangzhao Peng, Shizhen Zhang & Changling 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 24808
doi: https://doi.org/10.1038/s41598-025-09796-0
https://www.nature.com/articles/s41598-025-09796-0
The Sichuan Basin has yielded abundant sauropod dinosaurs from the Middle-Late Jurassic, and Mamenchisauridae had predominated the dinosaur faunae during the Late Jurassic in the Sichuan Basin. Here, we describe a new sauropod dinosaur, Tongnanlong zhimingi gen. et sp. nov. from the Upper Jurassic Suining Formation in the Sichuan Basin, southwestern China. The holotype includes three dorsal and six caudal vertebrae, scapula, coracoid, and some hindlimb bones. It is diagnosed by the complex structures of the dorsal and anterior caudal vertebrae compared to other mamenchisaurids. Phylogenetic analysis shows that it is more closely related to Mamenchisaurus than to Omeisaurus. The huge-sized scapula and coracoid also indicate that the specimen belongs to an extremely gigantic individual with a body length approaching about 25 ~ 26 m. The new specimen enriches the diversity of Mamenchisauridae and provides additional information for understanding the evolution and diversity of eusauropod dinosaurs.
Free pdf:
Tongnanlong zhimingi gen. et sp. nov.
Tongnanlong zhimingi gen. et sp. nov.
Xuefang Wei, Yuanjun Tan, Shan Jiang, Jun Ding, Lei Li, Xiaobing Wang, Yiyang Liu, Guangbiao Wei, Deliang Li, Yu Liu, Guangzhao Peng, Shizhen Zhang & Changling 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 24808
doi: https://doi.org/10.1038/s41598-025-09796-0
https://www.nature.com/articles/s41598-025-09796-0
The Sichuan Basin has yielded abundant sauropod dinosaurs from the Middle-Late Jurassic, and Mamenchisauridae had predominated the dinosaur faunae during the Late Jurassic in the Sichuan Basin. Here, we describe a new sauropod dinosaur, Tongnanlong zhimingi gen. et sp. nov. from the Upper Jurassic Suining Formation in the Sichuan Basin, southwestern China. The holotype includes three dorsal and six caudal vertebrae, scapula, coracoid, and some hindlimb bones. It is diagnosed by the complex structures of the dorsal and anterior caudal vertebrae compared to other mamenchisaurids. Phylogenetic analysis shows that it is more closely related to Mamenchisaurus than to Omeisaurus. The huge-sized scapula and coracoid also indicate that the specimen belongs to an extremely gigantic individual with a body length approaching about 25 ~ 26 m. The new specimen enriches the diversity of Mamenchisauridae and provides additional information for understanding the evolution and diversity of eusauropod dinosaurs.
Gregory Paul
Jul 10, 2025, 2:49:09 PM7/10/25
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I am getting about 30 tonnes, for this baby. Big, but not super big.
GSPaul
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