page_title: Pupilla muscorum
section_title: Description
hierarchical_section_title: Pupilla muscorum / Description
caption_attribution_description: Familie: Pupillidae Groesse: 3,4 x 1,7 mm Verbreitung; holarktisch Fundort: Germania, Bayern, Oberfranken, Weismain leg.det. U.Schmidt, 1983 Photo: U.Schmidt, 2007
context_page_description: Pupilla muscorum, commonly known as the Moss Chrysalis snail or widespread column, is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Pupillidae.
context_section_description: The shell is usually light brown, varies from reddish brown to horny grey, weakly striated or almost smooth, 5–6.5 weakly convex whorls, suture not very deep (deep suture is presented in Pupilla sterrii – see picture below), aperture usually with well-developed lip, cervical callus strongly developed, like a dam, parietal tooth usually present, palatal tooth sometimes too.
  Pupilla muscorum differs from Pupilla pratensis with which it lives sympatrically, in its thicker, smaller and more slender shell, lighter and more variable colour and stronger apertural lip.
  The animal of Pupilla muscorum is small, elliptical, dark with lighter sides and foot, upper tentacles not very long, lower tentacles very short.
  The height of the shell is 3.0–4.0 mm. The width of the shell is 1.65–1.75 mm (shell diameter does not vary much).
caption: Photo of the shell Pupilla sterrii with deep sutures
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