Common Name

Scientific Name

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Utah Taxonomy

Berry (1947) referred to this species in Utah as Helisoma oregonense. Baker (1945) also placed this species in the genus Helisoma.

No subspecies are recognized in this species.

Status in Utah

Only one occurrence in Utah is known (Berry 1947, which may be the same record as Baker 1945). This one reported occurrence (Berry 1947, and possibly Baker 1945) is from Salt Springs, a spring complex, including Blue Lake, on the Elko County, Nevada-Tooele County, Utah, boundary, but mostly in Utah.

Abundance of this species in Utah is not known but must be very low, for only one occurrence has been reported.

Threats to this species in Utah are not known. Potential threats likely include dewatering and the introduction of fishes and exotic mollusks. Population trend of this species in Utah is not known.

Inventory for this species is needed in northwestern Utah, particularly in western Tooele and Box Elder counties.

Taylor (1986) seems to have questioned the identification of this species at Salt Springs by Berry (1947) and implied that what Berry (1947) actually found was a related species Planorbella duryi. This latter species, which Taylor (1986) indicated was "not native to Utah, probably introduced by the aquarium trade", has not been reported from Utah by any other author, so far as is known.

Habitats Utilized in Utah

Taylor (1986) reported the habitat at a locality reported by Berry (1947) to support this species; Taylor (1986), however, doubted Berry's (1947) identification. Taylor described the site as a complex of springs and wrote: "Flowing water at the spring sources, and the immediately adjacent source pools, were the only places where living mollusks were found. Even one-eighth mile downstream where flowing water ends at the saline ponds and pools, no living molluscs or fresh shells were found."


  • Text modified from: Oliver, George V. and William R. Bosworth III. 1999. Rare, imperiled, and recently extinct or extirpated mollusks of Utah[:] a literature review. Publication number 99-29. Utah Division of Wildlife Resources, Salt Lake City. 230 pp.