| Synthopsis | |
|---|---|
|   | |
| Synthopsis mactanensis | |
|  Scientific classification   | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Mollusca | 
| Class: | Gastropoda | 
| Subclass: | Caenogastropoda | 
| Clade: | Hypsogastropoda | 
| Suborder: | Ptenoglossa | 
| Superfamily: | Triphoroidea | 
| Family: | Cerithiopsidae | 
| Genus: |  Synthopsis  Laseron, 1956  | 
| Type species | |
| Synthopsis cylindrica Laseron, 1956  | |
Synthopsis is a genus of very small sea snails, marine gastropod molluscs in the family Cerithiopsidae, the cerithids. [1]
Species within the genus Synthopsis include:
Cerithiopsidae is a family of very small sea snails in the informal group Ptenoglossa. Members of this family are known as cerithiopsids.
Specula is a genus of minute sea snails, marine gastropod molluscs or micromolluscs in the family Cerithiopsidae.
Zafra is a large genus of sea snails in the family Columbellidae, the dove snails.
Pusillina is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae.
Seila is a genus of minute sea snails, marine gastropod molluscs or micromolluscs in the family Cerithiopsidae.
Cerithiopsis is a genus of very small sea snails, marine gastropod mollusks or micromollusks in the family Cerithiopsidae.
Costulopsis hadfieldi is a species of sea snail, a gastropod in the family Cerithiopsidae. It was described by Jay and Drivas, in 2002.
Retilaskeya is a genus of minute sea snails, marine gastropod molluscs in the family Newtoniellidae. It was described by Marshall, in 1978.
Belonimorphis is a small genus of sea snails comprising five species:

Cerithiella is a genus of minute sea snails, marine gastropod molluscs in the family Newtoniellidae.
Dizoniopsis is a genus of minute sea snails, marine gastropod molluscs in the family Cerithiopsidae.
Horologica is a genus of minute sea snails, marine gastropod molluscs in the family Cerithiopsidae.
Joculator is a genus of minute sea snails, marine gastropod molluscs in the family Cerithiopsidae. This genus was described by Hedley in 1909.
Mendax is a genus of very small sea snails, marine gastropod molluscs in the family Cerithiopsidae.
Marshallopsis is a genus of minute sea snails, marine gastropod molluscs in the family Cerithiopsidae.
Clathropsis is a genus of minute sea snails, marine gastropod molluscs in the family Cerithiopsidae.
Costulopsis is a genus of minute sea snails, marine gastropod molluscs in the family Cerithiopsidae.
Sundaya is a genus of sea snails in the family Cerithiopsidae
Prolixodens is a genus of very small sea snails, marine gastropod molluscs in the family Cerithiopsidae.
Tubercliopsis is a genus of very small sea snails, marine gastropod molluscs in the family Cerithiopsidae, the cerithids.