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Radix is a genus of air-breathing freshwater snails, aquatic pulmonate gastropods in the family Lymnaeidae, the pond snails.
Taxonomy and systematics of the genus Radix
The taxonomic status of the genus Radix is disputed. Remigio (2002) reported sequence divergence within 16S mitochondrial gene of R. peregra and R. ovata.[1] Furthermore, shell morphology and alloenzyme data indicated that R. peregra and R. ovata are distinct.[2][3] In contrast, Bargues et al. (2001) considered on the basis of ITS-2 sequence analysis R. peregra, R. ovata, and R. balthica as a conspecific species.[4]. Recent reports suggests that the taxonomic status within the genus Radix is more complicated, and so further investigations are needed.
- Radix ampla (Hartmann, 1821)
- Radix auricularia (Linnaeus, 1758)
- Radix auricularia japonica Jay, 1857 - at Japanese wikipedia
- Radix ovata (Draparnaud, 1805) = Radix balthica (Linnaeus, 1758)
- Radix peregra (O. F. Müller, 1774) = Radix labiata (Rossmässler, 1835)
- Radix lagotis (Schrank, 1803)
or R. peregra = R. ovata = R. balthica
Parasites
Species within the genus Radix are utilized as intermediate hosts by several different trematode species:
- Trichobilharzia spp.
- Fasciola hepatica
- Fasciola gigantica
- Fascioloides magna
- Plagiorchis neomidis
- Haplometra cylindracea
- Echinostoma spp.
References
- ^ Remigio, E.A., 2002. Molecular phylogenetic relationships in the aquatic snail genus Lymnaea, the intermediate host of the causative agent of fascioliasis: insights from broader taxon sampling. Parasitol Res 88, 687–96.
- ^ Glöer, P., Meier-Brook, C., Osterman, O., 1987. Süsswassermollusken: ein Bestimmungsschlüssel für die Bundesrepublik Deutschland. Deutscher Jugendbund für Naturbeobachtung, Hamburg.
- ^ Ward, P.I., Goater, C.P., Mikos, M., 1997. Shell variation in sympatric freshwater Lymnaea peregra and Lymnaea ovata (Gastropoda; Lymnaeidae). Biol J Linn Soc 61, 139–149.
- ^ Bargues, M.D., Vigo, M., Horák, P., Dvořák, J., Patzner, R.A., Pointier, J.P., Jackiewicz, M., Meier-Brook, C., Mas-Coma, S., 2001. European Lymnaeidae (Mollusca: Gastropoda), intermediate hosts of trematodiases, based on nuclear ribosomal DNA ITS-2 sequences. Infect Genet Evol 1, 85–107.
