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long-neck giant
Astigmasaura
Say it like this: “ah-STIG-mah-SOR-uh”
Astigmasaura genuflexa
Astigmasaura ate plants and walked on four legs. It lived in the Late Cretaceous. Bones have been found in Argentina.
- When
- Late Cretaceous (Cenomanian · Turonian) · roughly 100.5 to 89.8 million years ago
- Named in
- 2025 · Bellardini, F.; Filippi, L. S.; Carballido, J. L.; Garrido, A. C.; Baiano, M. A.
- Hip height
- Not established
- Length
- Not established
- Weight
- Not established
- Found in
- Argentina · Huincul
- Food and walking
- Herbivore · Four legs
- Kind
- long-neck giant · Sauropod
- Family branch
- Rebbachisauridae
The story in short
In 2025, F. Bellardini and colleagues published the name Astigmasaura. The name means “without signs.”
Fossils referred to Astigmasaura date to the Late Cretaceous (Cenomanian · Turonian), roughly 100.5 to 89.8 million years ago. Finds come from Argentina, including the Huincul Formation. It was a herbivore and walked on four legs.
The fossils of Astigmasaura are too incomplete for a responsible length, hip height, or weight, so those fields are left blank on purpose.
On the family tree it sits in Rebbachisauridae, among the sauropod dinosaurs.
Close relatives
Agustinia
Agustinia ligabuei
Early Cretaceous (Albian) · roughly 113.2 to 100.5 million years ago
Amazonsaurus
Amazonsaurus maranhensis
Early Cretaceous (Aptian · Albian) · roughly 121.4 to 100.5 million years ago
Campananeyen
Campananeyen fragilissimus
Late Cretaceous (Cenomanian) · roughly 100.5 to 93.9 million years ago