Caseolus calvus
Encyclopedia
Caseolus calvus is a species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of small air-breathing land snail
Land snail
A land snail is any of the many species of snail that live on land, as opposed to those that live in salt water and fresh water. Land snails are terrestrial gastropod mollusks that have shells, It is not always an easy matter to say which species are terrestrial, because some are more or less...

, terrestrial
Terrestrial animal
Terrestrial animals are animals that live predominantly or entirely on land , as compared with aquatic animals, which live predominantly or entirely in the water , or amphibians, which rely on a combination of aquatic and terrestrial habitats...

 pulmonate gastropod mollusks in the family Hygromiidae
Hygromiidae
Hygromiidae is a taxonomic family of small to medium-sized air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.-Anatomy:...

, the hairy snails and their allies.

Subspecies

  • Caseolus calvus calvus (R. T. Lowe, 1831)
  • Caseolus calvus galeatus (R. T. Lowe, 1862)


The subspecies Caseolus calvus galeatus (R. T. Lowe, 1862) endemic to Madeira is globally extinct.

Distribution

This species of land snail lives in Madeira, Portugal.
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