| Sinployea planospira | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Charopidae |
| Genus: | Sinployea |
| Species: | †S. planospira |
| Binomial name | |
| †Sinployea planospira Garrett, 1872 | |
Sinployea planospira was a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Charopidae. This species was endemic to the Cook Islands; it is now extinct.