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long-neck giant
Tongnanlong
Say it like this: “TOHNG-nahn-long”
Tongnanlong zhimingi
Tongnanlong ate plants and walked on four legs. It lived in the Late Jurassic. Bones have been found in China.
- When
- Late Jurassic
- Named in
- 2025 · Wei, X.; Tan, Y.; Jiang, S.; Ding, J.; Li, L.; Wang, X.; Liu, Y.; Wei, G.; Li, D.; Liu, Y.; Peng, G.; Zhang, S.; Lao, C.
- Hip height
- Not established
- Length
- 25–26 m · 82–85 ft
- Weight
- Not established
- Found in
- China · Suining
- Food and walking
- Herbivore · Four legs
- Kind
- long-neck giant · Sauropod
- Family branch
- Mamenchisauridae
The story in short
In 2025, X. Wei and colleagues published the name Tongnanlong. The name means “tongnan District dragon.”
It lived in the Late Jurassic, within an age that is only broadly constrained. Finds come from China, including the Suining Formation. It was a herbivore and walked on four legs.
Published estimates put Tongnanlong at a length near 25–26 m.
On the family tree it sits in Mamenchisauridae, among the sauropod dinosaurs.
Close relatives
Analong
Analong chuanjieensis
Middle Jurassic (Bajocian) · roughly 170.9 to 168.2 million years ago
Anhuilong
Anhuilong diboensis
Middle Jurassic (Aalenian–Callovian) · roughly 174.7 to 161.5 million years ago
Chuanjiesaurus
Chuanjiesaurus anaensis
Middle Jurassic (Bajocian) · roughly 170.9 to 168.2 million years ago