| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Thalassiosaurus
Taxonomy
Thalassiosaurus was named by Welles (1943).
It was synonymized subjectively with Styxosaurus by Carpenter (1999).
It was assigned to Elasmosauridae by Welles (1943).
It was synonymized subjectively with Styxosaurus by Carpenter (1999).
It was assigned to Elasmosauridae by Welles (1943).