Hydrotherosaurus
Hydrotherosaurus (meaning "water beast lizard") is an extinct genus of elasmosaurid plesiosaur from the Upper Cretaceous (Maastrichtian stage) Moreno Formation of Fresno County, California, USA. The only known species, H. alexandrae, was named for its discoverer, Annie Montague Alexander, by Samuel Paul Welles.
| Hydrotherosaurus Temporal range: Maastrichtian, ~ | |
|---|---|
| Restoration | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Superorder: | †Sauropterygia |
| Order: | †Plesiosauria |
| Family: | †Elasmosauridae |
| Genus: | †Hydrotherosaurus Welles, 1943 |
| Species: | †H. alexandrae |
| Binomial name | |
| †Hydrotherosaurus alexandrae Welles, 1943 | |
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