| Thyca callista | |
|---|---|
| Scientific classification   | |
| Kingdom: | Animalia | 
| Phylum: | Mollusca | 
| Class: | Gastropoda | 
| Subclass: | Caenogastropoda | 
| Order: | Littorinimorpha | 
| Family: | Eulimidae | 
| Genus: | Thyca | 
| Species: | T. callista | 
| Binomial name | |
| Thyca callista Berry, 1959 | |
| Synonyms | |
| 
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Thyca callista is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. The species is one of a number within the genus Thyca . [1]

Eulimidae is a family of very small parasitic sea snails, marine gastropod mollusks in the superfamily Vanikoroidea.

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.
Stilifer astericola is a parasitic sea snail, a marine gastropod mollusk in the taxonomic family Eulimidae. It is the type species of the genus Stilifer.
Apicalia palmipedis is a species of sea snail, a marine gastropod mollusk in the family Eulimidae.
Echineulima leucophaes is a species of sea snail, a marine gastropod mollusk in the family Eulimidae.
Echineulima philippinarum is a species of sea snail, a marine gastropod mollusk in the family Eulimidae.

Thyca astericola is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. The species is one of a number within the genus Thyca.

Thyca crystallina is a species of sea snail, a marine gastropod mollusc in the family Eulimidae. It is one of nine species within the genus Thyca, all of which are parasitic on starfish in the Indo-Pacific Ocean. This species was first described in 1846 by the American conchologist Augustus Addison Gould as Pileopsis crystallina but was later transferred to Thyca.

Thyca ectoconcha is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. The species is one of a number within the genus Thyca.
Thyca hawaiiensis is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. The species is one of a number within the genus Thyca.
Thyca lactea is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. The species is one of a number within the genus Thyca.
Thyca nardoafrianti is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. The species is one of a number within the genus Thyca.
Thyca sagamiensis is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. The species is one of a number within the genus Thyca.
Thyca stellasteris is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. The species is one of a number within the genus Thyca.
Goodingia capillastericola is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. This species, along with Goodingia varicosa belongs in the genus Goodingia.

Goodingia varicosa is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. This species, along with Goodingia capillastericola, belongs in the genus Goodingia.
Hypermastus cylindricus is a species of sea snail, a marine gastropod mollusk in the family Eulimidae.
Hypermastus lacteus is a species of sea snail, a marine gastropod mollusk in the family Eulimidae.
Melanella aethria is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. The species is one of many species known to exist within the genus, Melanella.
Robillardia is a genus of very small ectoparasitic sea snails, marine gastropod mollusks or micromollusks in the Eulimidae family. This genus was described by Edgar Albert Smith in 1889.