Dallasaurus
| Dallasaurus Temporal range: Late Cretaceous, Turonian
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| Reconstructed skeleton at the Perot Museum | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Clade: | †Mosasauria |
| Family: | †Mosasauridae |
| Subfamily: | †Mosasaurinae |
| Genus: | †Dallasaurus Polcyn et Bell, 2005 |
| Species | |
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Dallasaurus ("Dallas lizard") is a basal mosasauroid from the Upper Cretaceous of North America. Along with Russellosaurus, Dallasaurus is one of the two oldest mosasauroid taxa currently known from North America. It is also one of the smallest known mosasaurines, measuring approximately 1 m (3.3 ft) in length.