. "VU" . . . . "Physella spelunca,"@en . . . "Cave physa"@en . . "IUCN2.3" . "The cave physa (Physella spelunca) is a species of small, air-breathing, freshwater snail, an aquatic pulmonate gastropod mollusk in the family Physidae. It lives only in caves. This species is endemic to the United States."@en .