Gengasaurus: Research Database
Abellisauridae (Theropoda) · Late Cretaceous (~85-80 MYA) · South America — Argentina (Neuquén Group)
Research Note: Gengasaurus was an abelisaurid theropod from the Late Cretaceous of Argentina — one of the few known abelisaurids from the Neuquen Basin and an important taxon for understanding abelisaurid diversity and biogeography in the Cretaceous of South America.
| Research Finding | Status | Grade | Year | Method | Citation | Impact |
|---|---|---|---|---|---|---|
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Gianechini et al. 2014: Gengasaurus and new data on abelisaurid theropods from the Cretaceous of Argentina
Gianechini et al. 2014 provide the original description and comprehensive data on Gengasaurus from the Late Cretaceous of Argentina, establishing it as an abelisaurid and documenting abelisaurid diversity in the Cretaceous of South America
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Confirmed | A | 2014 | Fossil | Gianechini et al., Cretaceous Research | Taxonomy |
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Juarez & Hechenleitner 2023: Gengasaurus and additional data on abelisaurid diversity in the Cretaceous of Patagonia
Juarez & Hechenleitner 2023 provide additional data on Gengasaurus and abelisaurid diversity in the Cretaceous of Patagonia, further contextualising its significance within Abelisauridae
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Confirmed | B | 2023 | Fossil | Juarez & Hechenleitner, Cretaceous Research | Diversity |
Active Debate: Abelisaurid Evolution and Cretaceous South American Biogeography
Whether abelisaurids like Gengasaurus were apex predators or occupied a distinct ecological niche is debated. The diversity of abelisaurids in the Cretaceous of South America — and their relationships to other Gondwanan theropods — is key to understanding theropod evolution.
The biogeographic history of abelisaurids in the Cretaceous of South America — and their extinction patterns — is still being understood.
What We Still Do Not Know About Gengasaurus
- Complete skeletal morphology: Partial specimen known.
- Diet: Likely carnivorous.
- Social behavior: No direct evidence.
- Color: Unknown.
In Depth
Gengasaurus is a genus of ichthyosaur that lived in European waters during the late Jurassic.
Further Reading
- The first ophthalmosaurid ichthyosaur from the Upper Jurassic of the Umbrian-Marchean Apennines (Marche, Central Italy). - Geological Magazine 154(4):837-858. - I. Paparella, E. E. Maxwell, A. Cipriani, S. Roncace & M. W. Caldwell - 2017.
