AppalachinaAppalachina is a genus of small, air-breathing, land snails, terrestrial pulmonate gastropod molluscs in the family Polygyridae.TaxonomyHenry Augustus Pilsbry created what was then the subgenus Appalachina, a group of land snails in the family Polygyridae, for those snails with comparatively depressed shells and an open umbilicus. The reproductive anatomy of these snails is important for distinguishing them from other polygyrids.SpeciesThe genus Appalachina includes the following species:Appalachina chilhoweensis ''Appalachina sayana''