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Armigerous river snail
Conservation status
	; Vulnerable (IUCN 2.3)
	; Vulnerable (NatureServe)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	incertae sedis
Family:	Pleuroceridae
Genus:	Lithasia
Species:	L. armigera
Binomial name
	Lithasia armigera; (Say, 1821)
Synonyms
	Angitrema angulata Wetherby, 1876 ; Angitrema armigera (Say, 1821) ; Angitrema parva Wetherby, 1876 ; Lithasia downiei Lea, 1862 ; Melania armigera Say, 1821 ; Melania nodata Reeve, 1861 ; Melania pallidula Anthony, 1854 ; Melania spixiana Lea, 1838 ; Melania stygia Say, 1829 ; Melania tuberculata Lea, 1831 ; Meseschiza grosvenorii Lea, 1864;

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.

References

↑ Bogan, A.E. (1996). "Lithasia armigera". IUCN Red List of Threatened Species. 1996 e.T12127A3323815. doi:10.2305/IUCN.UK.1996.RLTS.T12127A3323815.en. Retrieved 15 November 2021.
↑ NatureServe. "Lithasia armigera". NatureServe Explorer. Arlington, Virginia. Retrieved 28 March 2026.
↑ Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O (eds.). "Lithasia armigera (Say, 1821)". MolluscaBase. World Register of Marine Species. Retrieved 1 April 2026.

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