Oscilla annulata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.[1]
| Oscilla annulata | |
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| Drawing of a shell of Oscilla annulata | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Family: | Pyramidellidae |
| Genus: | Oscilla |
| Species: | O. annulata
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| Binomial name | |
| Oscilla annulata (A. Adams 1855)
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| Synonyms | |
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Description
editThe length of the whitish shell measures 5 mm. The numerous whorls of the teleoconch are flattened, and spirally ribbed. Their interstices are longitudinally striated. The columella has a single posterior plication. The lip is subcrenulated, the interior lirate.[2]
Distribution
editThis marine species occurs in the demersal zone off the Philippines, Singapore and Japan.