Radix is a genus of air-breathing freshwater snails, aquatic pulmonate gastropods in the family Lymnaeidae, the pond snails.

[3] Correa et al. (2010) confirmed that the placement of these species within the genus Radix reflected their phylogenetic relationship.

[4] The taxonomic status of certain species in the genus Radix has been disputed.

Remigio (2002) reported sequence divergence within the 16S mitochondrial gene of Radix peregra and Radix ovata.

[6][7] In contrast, Bargues et al. (2001) considered, on the basis of ITS-2 sequence analysis, that R. peregra, R. ovata, and R. balthica are in fact conspecific.