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meaning: "Sea lord"
Named By: Welles in 1943
Time Period: Late Cretaceous, 95 Ma
Location: USA, Colorado - Graneros Shale Formation, and Montana - Belle Fourche Formation
Size: 12 meters long
Diet: Piscivore
Fossil(s): Remains of 6 individuals
Classification: | Chordata | Reptilia | Sauropterygia | Plesiosauria | Elasmosauridae |
Also known as: | Alzadasaurus riggsi |

Thalassomedon is a genus of plesiosaur, named by Welles in 1943. Greek, thalassa, "sea" and Greek, medon, "lord, ruler": Sea lord.

Read more about Thalassomedon at Wikipedia
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