Columella (genus)
Columella is a genus of very small, air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Truncatellinidae, the whorl snails and allies.
Taxonomy
Columella is commonly classified within the Vertiginidae. However, as shown by Nekola & Coles, the genus is not that closely related to the Vertiginidae, but may rather be affiliated with the Chondrinidae or form a pupilloid family of its own. A systematic revision is pending.Species
Species within the genus Columella include:Columella acicularis Almuhambetova, 1979Columella aspera Waldén, 1966Columella columella Columella edentula - toothless columnColumella hartmutnordsiecki Schlickum & Geissert, 1980 Columella hasta Columella intermedia Schileyko & Almuhambetova, 1984Columella microspora Columella nymphaepratensis Hlaváč & Pokryszko, 2009Columella polvonense Columella simplex Columella talgarica Schileyko & Rymzhanov, 2010Columella wyciski Schlickum & Strauch, 1972;Species brought into synonymy:Columella inornata : synonym of Columella edentula Columella ninagongonis Pilsbry, 1935: synonym of Truncatellina ninagongonis Columella tridentata A. B. Leonard, 1946: synonym of ''Gastrocopta ruidosensis''