| Unktaheela Temporal range: Late Cretaceous (middle Campanian),
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| Diagram of a restored skull | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Superorder: | †Sauropterygia |
| Order: | †Plesiosauria |
| Family: | †Polycotylidae |
| Clade: | †Dolichorhynchia |
| Genus: | †Unktaheela |
| Species: | †U. specta
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| Binomial name | |
| †Unktaheela specta Clark, O'Keefe & Slack, 2023
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Unktaheela is an extinct genus of polycotylid plesiosaur from the Late Cretaceous Sharon Springs Formation of the United States. The genus contains a single species, U. specta, known from two partial skeletons. Unktaheela represents the smallest known polycotylid.