A Sand-dwelling Mayfly - Homoeoneuria alleni
General Description
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Distribution
Montana Range
Distribution Comments
Rangewide, H. alleni is known to occur in Saskatchewan and the Intermountain West (CO, MT, NM, UT) (NatureServe 2006). In Montana, H. alleni has been reported from 2 sites on the Powder River and 1 site in the lower Yellowstone River
Observations in Montana: 5
Montana CountiesCuster, Powder River, Richland
Habitat
This species is associated with larger, perennially flowing prairie rivers with sand-gravel dominated bottoms with cobble riffles
Threats or Limiting Factors
Threats to this species include dams and diversions and excessive siltation that smothers their sandy bottom habitats
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