Spelaeodiscus triariusSpelaeodiscus triarius is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Spelaeodiscidae.SubspeciesSpelaeodiscus triarius tatricus - synonym: Spelaeodiscus tatricus Hazay, 1883 - The native distribution of this subspecies is western-carpathian. It is endemic to Slovakia and it is listed as Vulnerable in the 2010 IUCN Red List.