Acorn ramshorn

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Acorn ramshorn
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Hygrophila
Superfamily: Planorboidea
Family: Planorbidae
Genus: Planorbella
Species: P. multivolvis
Binomial name
Planorbella multivolvis
(Case, 1847)

The acorn ramshorn, scientific name Planorbella multivolvis, was a species of small freshwater air-breathing snail, a pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.

This species was endemic to the United States. It is now considered to be extinct.


  1. ^ Bogan A. E. (2000). Planorbella multivolvis. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.