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Species Details
Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum Read more about this collection »
SeasonalityAdults fly from early May to mid-August.
IdentificationMale forewings are pale brownish-yellow with darker areas. Antennae are yellow, vertex pale reddish brown in males and yellow-brown in females and thorax is pale reddish brown to yellowish brown laterally. Legs are yellow with straw-coloured spurs. The distal article of the male clasper is large, robust and distally rounded with a mesal tooth (Nimmo, 1987).
Scientific Name
Hydropsyche occidentalis
Habitat
Eclectic flowing waters.
Seasonality
Adults fly from early May to mid-August.
Identification
Male forewings are pale brownish-yellow with darker areas. Antennae are yellow, vertex pale reddish brown in males and yellow-brown in females and thorax is pale reddish brown to yellowish brown laterally. Legs are…
Male forewings are pale brownish-yellow with darker areas. Antennae are yellow, vertex pale reddish brown in males and yellow-brown in females and thorax is pale reddish brown to yellowish brown laterally. Legs are yellow with straw-coloured spurs. The distal article of the male clasper is large, robust and distally rounded with a mesal tooth (Nimmo, 1987).
Life History
Annual(?) Unknown.
Conservation
Common.
Diet Info
Larvae are omnivorous.
Range
Found throughout the western Cordillera, from Mexico north to British Columbia and east to the plains of Saskatchewan. In Alberta, found in the prairies and the boreal forest.
Citation
Page Citation for Hydropsyche occidentalis
Page Citation
"Species Details - Hydropsyche occidentalis, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-1314/9-13538. Accessed 22 Dec. 2024.
References
Author
LaFontaine, Gary
Title
Caddisflies
Publication Date
1981
Pages
336
Author
Nimmo, A. P.
Title
The adult Arctopsychidae and Hydropsychidae (Trichoptera) of Canada and adjacent United States.
Publication Date
1987
Series Title
Quaestiones Entomologicae
Volume
23
Pages
1-189
Specimen Information
There are 47 specimens of this Species.
UASM5578 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Lethbridge
Collected ByLarson, D. J.
Date Collected1965-07-16
UASM5581 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Nobleford
Collected ByPhilip, H.
Date Collected1976-07-07
UASM5582 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fort Vermilion
Collected ByPhilip, H.
Date Collected1976-07-02
UASM5585 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Pembina River
Collected ByNimmo, A.
Date Collected1965-07-22
UASM5586 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Nanton
Collected ByPhilip, H.
Date Collected1976-07-25
UASM5587 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Three Hills
Collected ByPhilip, H.
Date Collected1976-07-23
UASM5589 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Blindman River
Collected ByNimmo, A.
Date Collected1967-07-28
UASM5591 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Oldman River
Collected ByNimmo, A.
Date Collected1967-08-13
UASM5593 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Nobleford
Collected ByPhilip, H.
Date Collected1976-07-07/1976-07-11
UASM5594 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Lethbridge
Collected ByLarson, D. J.
Date Collected1965-07-15
UASM5598 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Nobleford
Collected ByPhilip, H.
Date Collected1976
UASM6519 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Lethbridge
Collected ByLarson, D. J.
Date Collected1965-07-28
UASM6520 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Lethbridge
Collected ByLarson, D. J.
Date Collected1968-07-28
UASM6186 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Oldman River
Collected ByBraimah, A.
Date Collected1982-07-10
UASM264003 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Edmonton
Collected BySperling, F. A. H.
Date Collected2006-07-11
UASM264063 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: Idaho, Custer county
Collected ByDjernaes, M.
Date Collected2007-07-03
UASM264187 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: California, Sierra National Forest
Collected ByRoe, A.; Lumley, L.
Date Collected2007-07-09
UASM264188 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: Washington, Chelan county, Wenatchee National Forest
Collected ByDombroskie, J.
Date Collected2007-07-28
UASM264189 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: California, Sierra National Forest
Collected ByDjernaes, M.
Date Collected2007-07-09
UASM264190 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: Oregon, Jefferson county, Deschutes National Forest
Collected ByDombroskie, J.
Date Collected2007-07-25
UASM264191 - Hydropsyche occidentalis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: Arizona, Maricopa county, Phoenix
Collected BySimonsen, T. J.
Date Collected2007-05-08