Sellithyris Sella Shell
- Family: Brachiopod
- Species: Sellithyris sella
- Geological Age: Cretaceous period, 145 to 65 million years ago.
- Location: Lower Greensands on the Isle of Wight, UK.
Sellithyris sella is a species of terebratula, an genus of brachiopod which lived during the Cretaceous period. These particular fossil specimens were found in the Lower Greensands on the Isle of Wight, UK and are in their single shells. the shells them selves are an off white colour and are approximately 2 cm in length. Each piece come supplied in a polythene bag with an information label.