Pyramidula pusilla
Species of gastropod
From Wikipedia, the free encyclopedia
Pyramidula pusilla is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Pyramidulidae.[2]
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| Pyramidula pusilla | |
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| Shell of Pyramidula pusilla (specimen at MNHN, Paris) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Pyramidulidae |
| Genus: | Pyramidula |
| Species: | P. pusilla |
| Binomial name | |
| Pyramidula pusilla | |
| Synonyms | |
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Shell description
The width of the shell is up to 2.95 mm, the height is up to 2.25 mm.[3] The shell has a low conical shape, broader than high. It is and tightly coiled. The apical whorls regularly increase. The umbilicus is 1/4 of the diameter (in some Spain localities 1/3). The growth lines are fine and narrow, sometimes weak. The colour is red brown becoming more grey with age.
Distribution
The geographical distribution of this species is mainly Mediterranean: western and central Europe,[3] southeastern Europe,[4] Caucasus,[4] Central Asia[4] and probably the Russian Far East.[4]
Europe (not a complete list):
Southwestern Asia (not a complete list):
