Carychiinae

Carychiinae is a taxonomic subfamily of minute air-breathing land snails, terrestrial pulmonate gastropod mollusks.

Taxonomy
Carychiinae is part of the family Ellobiidae (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).

Some authors consider Carychiidae as a separate family.

Genera
Genera within the subfamily Carychiinae include:
 * Carychiella Strauch, 1977
 * Carychiopsina Kadolsky, 2020 †
 * Carychiopsis Sandberger, 1872 †
 * Carychium O. F. Müller, 1773 - type genus of the subfamily Carychiinae
 * Koreozospeum Jochum, Prozorova, Sharyi-ool & Páll-Gergely, 2015
 * Ovicarychium Kadolsky, 2020 †
 * Turricarychium Kadolsky, 2020 †
 * Zospeum Bourguignat, 1856
 * Zuella Kadolsky, 2020 †

Ecology
One lineage of the Ellobioidea, the Carychiidae has successfully accomplished a complete transition onto land. Extant carychiid snails inhabit aphotic and permanently wet epigean (Carychium) or subterranean (Zospeum) environments throughout their Holarctic distribution. This dramatic shift from a marine to a terrestrial habitat has occurred independently of the stylommatophoran land-snails of the Eupulmonata.