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Show 166 Taxonomy and Biology Epeorus albertae is closely related to. (McDunnough) and difficult distinguish. distinct to adults of the two species from all dulciana somewhat are They do, however, represent species group within the subgenus distinguished the the other and a easily are species by characters given in keys. The of nymphs this species have been collected in large, moderately flowing .rivers (less commonly in streams) among rocks and feet. Edmunds taries of E. the albertae (Eaton) as occur the water Adults morning this of three to or the cold in to feet 1rJa Wyoming and and nymphs species of warmer this to of study Utah, become 7,000 tribu report that longimanus at species lower do not temperatures. have riffles evening direct sunlight. during July their gradually replace . ter over in 4,000 from elevations temperatures Evidently commonly from two in Green River believed at (1960), and Musser is elevations. and gravel been collected of rivers They swarming during early have been collected August. Distribution Epeorus albertae is a species previously unrep.orted (1964) report that this boreal western North American from Idaho. Edmunds and Allen species is widely distributed in the |
