Pupilla muscorum, commonly known as the Moss Chrysalis snail[1] or widespread column,[4] is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Pupillidae.

[5] 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.

[3] Extant populations of P. muscorum are practically identical in shape to their ancestors, indicating that they have tracked their ecological niches over time.

[3] This species of land snail occurs in the Northern Hemisphere including almost all of Europe.

It is recorded as present in countries and islands including: Pupilla muscorum lives in dry meadows, sand dunes, in open and sunny habitats.