. . . . . . "IUCN2.3" . "Armigerous river snail"@en . "The armigerous river snail or armored rocksnail, scientific name Lithasia armigera, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pleuroceridae. This species is endemic to the United States."@en . "VU" . .