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| Dinilysia Temporal range: Late Cretaceous,
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| Illustration of the skull and vertebral column | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Clade: | Ophidia |
| Family: | †Dinilysiidae |
| Genus: | †Dinilysia Woodward, 1901 |
| Type species | |
| Dinilysia patagonica Woodward, 1901
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Dinilysia (meaning "terrible ilysia") is an extinct genus of snake from the Late Cretaceous (Coniacian) of South America. Dinilysia was a relatively large ambush predator, measuring approximately 2 m (6.6 ft) long. The skull morphology of Dinilysia is similar to boids, suggesting that it was able to consume large prey. Living in a desert-like environment, Dinilysia is likely a terrestrial or a semi-fossorial animal.[1]
- ^ Caldwell, M.W.; Albino, A.M. (2001). "Palaeoenvironment and palaeoecology of three Cretaceous snakes: Pachyophis, Pachyrhachis, and Dinilysia". Acta Palaeontologica Polonica. 46 (2): 203–218. doi:10.7939/R3RZ8C. S2CID 55222891.