Astigmasaura (meaning without signs lizard) is an extinct genus of rebbachisaurid dinosaur that lived in the Late Cretaceous Huincul Formation of Argentina. The type species is Astigmasaura genuflexa.
Discovery and Naming[]
The holotype (MAU-Pv-EO-629) was found near the YPF oil field in 'El Orejano locality'. The remains were described in 2024 by Flavio Bellardini and his colleagues as indeterminate basal rebbachisaurid. In 2025, Bellardini and his colleagues described it as a new species. The generic name combines astigma, meaning without sign, with saura, while the specific name combines genu, meaning knee, and flecto, meaning to flex.
Description[]
The specimen is incomplete but fully articulated. The holotype was discovered with both limbs angled backward. It comprises 20 caudal vertebrae, 19 haemal arches, most of pelvic gridle, both femora, etc.
Classification[]
This species is classified as a member of rebbachisauridae.
Paleoecology[]
It lived with Chakisaurus, Skorpiovenator, Argentinosaurus, Mapusaurus, and others in the Huincul Formation.
Gallery[]
