Pyramidula pusilla is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Pyramidulidae.
The width of the shell is up to 2.95 mm, the height is up to 2.25 mm. 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, southeastern Europe, Caucasus, Central Asia and probably the Russian Far East.
Europe (not a complete list):
Southwestern Asia (not a complete list):