Dinosaur genus

Astigmasaura

Bellardini et al. 2025

Astigmasaura is a dinosaur genus known from bones, found in rocks 110.1–106.3 million years old, in Argentina.

Confidence labels

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At a glance

Data as of 11 October 2026

110.1–106.3 Ma

Triassic

Jurassic

Cretaceous

252 million years ago20114366

The last non-bird dinosaurs died out 66 million years ago. That's as far from us as the end of this bar.

Named by: Bellardini et al. 2025
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Described in: F. Bellardini, L. S. Filippi, J. L. Carballido, A. C. Garrido, M. A. Baiano (2025). Side by side with titans: A new rebbachisaurid dinosaur from the Huincul Formation (upper Cenomanian) of Patagonia, Argentina. Cretaceous Research 176(78): 106188. Read it
medium
medium: Only PBDB gives this; its author and year match the naming authority (Bellardini et al. 2025).
Sources
Given by: Paleobiology Database. The publication the Paleobiology Database gives as the authority for this genus name, usually the one that first named and described it.
Type species: Astigmasaura genuflexa
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Lived: Albian, 110.1–106.3 million years ago
medium
medium: Only PBDB gives this; nothing contradicts it.
Omnisaura calculation110.1–106.3 million years ago, from its dated fossil records
low
low: Omnisaura's calculation from only 1 dated record(s).
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Fossils found in: Argentina
low
low: Only one PBDB record.
Sources
Given by: Paleobiology Database. How it was chosen: Union of all sources (ISO 3166).
Rock formations: Huincul
low
low: Only one PBDB record.
Sources
Given by: Paleobiology Database. How it was chosen: Canonical names, automatic and editor-approved matches applied.
Family: Rebbachisauridae
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Parent group: Rebbachisauridae
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Species named in its records: Astigmasaura genuflexa
Sources
Given by: Paleobiology Database (the species its fossil records are identified as).
Diet: herbivore (inferred for its group)
medium
medium: Only PBDB gives this, and it infers it for the whole of Sauropoda, the group this genus belongs to, not from this genus's own fossils.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB, inferred from a group the genus belongs to.
Way of life: ground dwelling, gregarious (inferred for its group)
low
low: PBDB infers this way of life for the whole of Sauropoda; behaviour is rarely known for one genus.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB, inferred from a group the genus belongs to.
Known from: Bones
Sources
Given by: Paleobiology Database (what the name was based on).

Sources: Paleobiology Database (CC BY 4.0)Confidence levels and gaps are Omnisaura's own assessment.

Gaps are answers

What isn't known yet

Order: no source we use gives it yet.
Common names: no source we use gives it yet.
What it was named after: no source we use gives it yet.
Resting on one source: 7 facts come from a single source with nothing against them (rated medium): name (PBDB); authority (PBDB); type species (PBDB); parent group (PBDB); family (PBDB); age (headline) (PBDB); diet (PBDB).

Size and appearance aren't covered yet, and diet and way of life only as PBDB infers them for the wider group. Omnisaura leaves the rest out rather than guess.

Where sources disagree

None open. Where our sources overlap, they agree on everything shown here.

Did it meet…?

Did Astigmasaura meet ?

No. Astigmasaura had gone at least 22.7 million years before Tyrannosaurus appears in the fossil record.

Going by the ages and rock formations of their dated fossils, as on the map. Compare their fossil sites on the map.

Connections

Genera linked to Astigmasaura by where and when their fossils were found, by classification and by who named them. Select a name to open its page.

Same rocks, same time 14

Genera found in the same rock units, from rocks of overlapping age, the most shared fossil sites first.

Sidersaura Skorpiovenator Aoniraptor Argentinosaurus Bustingorrytitan Cathartesaura Chakisaurus Choconsaurus Chucarosaurus Cienciargentina Giganotosaurus Grallator Limaysaurus Taurovenator

Same family: Rebbachisauridae 11

Other genera in Rebbachisauridae with a full profile.

Agustinia Amazonsaurus Campananeyen Cathartesaura Cienciargentina Comahuesaurus Demandasaurus Limaysaurus Nigersaurus Rebbachisaurus Sidersaura

Found in Argentina 17

Other genera found in Argentina, from rocks of overlapping age, the most fossil sites there first.

Sidersaura Skorpiovenator Agustinia Aoniraptor Argentinosaurus Bustingorrytitan Cathartesaura Chakisaurus Choconsaurus Chucarosaurus Cienciargentina Giganotosaurus Grallator Lewisuchus Limaysaurus Taurovenatorand 1 more

Credits

Where this page comes from

Paleobiology DatabaseCC BY 4.0 · fossil records, ages, classification
OmnisauraOmnisaura editorial · confidence levels and gaps
PaleoMAP PaleoCoastlines (Kocsis and Scotese 2021)CC BY 4.0 · ancient coastlines on the small map
Natural EarthPublic domain · today's coastlines