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Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda

clade Sorbeoconcha

Superfamily: Cerithioidea
Family: Semisulcospiridae
Genus: Juga
H. Adams & A. Adams, 1854[1]

For the municipality in Finland, see Juuka

Juga is a genus of freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Semisulcospiridae.

These snails are native to the rivers of the northwestern United States and adjacent British Columbia. Several species are endemic to isolated large springs in the American Great Basin.

The most abundant and widespread species, Juga plicifera, attains a height of up to 35 mm. It is sculpted with fine spiral ridges and variably developed ribs that frequently disappear in parts of the shell made as the animal matures.


The following species and subspecies are listed by Burch (1982):[2]

Subgenus Juga s.s.

Subgenus Calibasis

Subgenus Oreobasis


Parasite of Juga spp. include bacterium Neorickettsia risticii that causes Potomac horse fever and the associated trematode vector.[3]


  1. ^ Adams H. (1854). Gen. Rec. Moll. 1: 300.
  2. ^ Burch J. B. (1982). Freshwater snails (Mollusca: Gastropoda) of North America. U.S. Environmental Protection Agency, Cincinnati. 294 pp.
  3. ^ Reubel, G. H.; Barlough, J. E.; Madigan, J. E. (1998). "Production and characterization of Ehrlichia risticii, the agent of Potomac horse fever, from snails (Pleuroceridae: Juga spp.) in aquarium culture and genetic comparison to equine strains". Journal of clinical microbiology 36 (6): 1501–1511. PMC 104868. PMID 9620368.  edit.

External links[edit]

Juga at the National Center for Biotechnology Information