Punctum pygmaeum

Punctum pygmaeum is a species of very small, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Punctidae, the dot snails.

Punctum pygmaeum
Five views of a shell of Punctum pygmaeum
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
Superfamily:
Punctoidea
Family:
Punctidae
Genus:
Punctum
Species:
P. pygmaeum
Binomial name
Punctum pygmaeum
(Draparnaud, 1801)[1]
Synonyms

Helix pygmæa Draparnaud, 1801

Shell description

For terms see gastropod shell The shell is very small, 1.2-1.6 mm in width.[2]

The 0.6-0.8 x 1.2-1.6 mm shell is almost flat, extremely densely and regularly striated, appearing silky shiny light horny brown. There are 3-3.5 moderately convex whorls, the aperture is rounded, with a thin margin which is not reflected and without a lip. The umbilicus is wide (25% of shell diameter).[3]

Distribution

This species occurs in countries and islands including:

gollark: What?
gollark: <@673952642623471676> Welcome. We know what you did.
gollark: I mean, surely they want everyone to be glowing bright green to advertise them?
gollark: It's completely triangular for GREEN parties to be antinuclear.
gollark: Something like that.

References
  1. Draparnaud J. P. R. 1801. Tableau des mollusques terrestres et fluviatiles de la France. pp. [1-2], 1-116. Montpellier, Paris. (Renaud; Bossange, Masson & Besson).
  2. (Welter-Schultes)
  3. Animalbase (Welter-Schultes)
  4. Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109.


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