Punctum pygmaeum
From Wikipedia, the free encyclopedia
| Punctum pygmaeum | |
|---|---|
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| Five views of a shell of Punctum pygmaeum | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Punctidae |
| Genus: | Punctum |
| Species: | P. pygmaeum |
| Binomial name | |
| Punctum pygmaeum (Draparnaud, 1801)[1] | |
| Synonyms | |
|
Helix pygmæa Draparnaud, 1801 | |
Punctum pygmaeum is a species of very small, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Punctidae, the dot snails.
For terms see gastropod shell. The shell is very small, 1.2-1.6 mm in width.[2]
The 0.6-0.8 x 1.2-1.6 mm shell is almost flat, extremely densely and regularly striated, appearing silky shiny light horny brown. There are 3-3.5 moderately convex whorls, the aperture is rounded, with a thin margin which is not reflected and without a lip. The umbilicus is wide (25% of shell diameter).[3]
