Pyramidula pusilla | |
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Shell of Pyramidula pusilla (specimen at MNHN, Paris) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Heterobranchia |
Order: | Stylommatophora |
Family: | Pyramidulidae |
Genus: | Pyramidula |
Species: | P. pusilla
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Binomial name | |
Pyramidula pusilla | |
Synonyms | |
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Pyramidula pusilla is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Pyramidulidae.[2]
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.
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):