| Thelyssina | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Family: | Seguenziidae |
| Subfamily: | Asthelysinae |
| Genus: | Thelyssina Marshall, 1983 |
| Type species | |
| Thelyssina sterrha Thelyssina sterrha | |
Thelyssina is a genus of sea snails, marine gastropod mollusks in the family Seguenziidae.
The conical shell contains a peripheral carina but no axial riblets, spiral lirae or microsculpture. The U-shaped posterior sinus is shallow. The anterolateral sinus is a channel. The basal sinus is present. The columella has no sinus or tooth. The aperture has a rhomboidal shape. There are no data about the radula.
Species within the genus Thelyssina include: