Thyca
Thyca is a genus of small sea snails, marine gastropod mollusks in the family Eulimidae. These snails are ectoparasites of starfish; they are relatively unmodified, the underside having become a suction disc with a central mouth that draws nourishment from the host's tissues.
Description
The conical shell is longitudinally grooved, transparent and slightly curved.Species
Species within the genus Thyca include:- Thyca astericola
- Thyca callista Berry, 1959
- Thyca crystallina
- Thyca ectoconcha P. Sarasin & F. Sarasin, 1887
- Thyca hawaiiensis Warén, 1980
- Thyca lactea
- Thyca nardoafrianti
- Thyca sagamiensis
- Thyca stellasteris Koehler & Vaney, 1912