Species Details
Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum Read more about this collection »
SeasonalityIn Illinois, adults can be found from late May to early July.
IdentificationAdults are of various shades of brown with no conspicuous markings. The male clasper is moderate and directed dorsad. There is no papillae dorsad of the cercus (Ross, 1944).
Scientific Name
Oecetis immobilis
Habitat
Standing and flowing waters.
Seasonality
In Illinois, adults can be found from late May to early July.
Identification
Adults are of various shades of brown with no conspicuous markings. The male clasper is moderate and directed dorsad. There is no papillae dorsad of the cercus (Ross, 1944).
Diet Info
Larvae are predacious.
Range
From Saskatchewan south to Illinois and east to New York and Nova Scotia.
Citation
Page Citation for Oecetis immobilis
Page Citation
"Species Details - Oecetis immobilis, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-2338. Accessed 16 Apr. 2025.
References
Author
Ross, Herbert, H.
Title
The caddis flies, or Trichoptera, of Illinois.
Publication Date
1944
Volume
23
Pages
326
Specimen Information
There are 20 specimens of this Species.
UASM5939 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-08-20
UASM5948 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-07-04
UASM5956 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-06-20
UASM5958 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
UASM5947 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-08-17
UASM5949 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-08-16
UASM5944 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-08-10
UASM5951 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-07-16
UASM5952 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-08-19
UASM5953 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-07-02
UASM5946 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-09-28
UASM5955 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-08-12
UASM5941 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-09-24
UASM5940 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-08-18
UASM5943 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-06-29
UASM5950 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-07-14
UASM5954 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-07-06
UASM5957 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-08-11
UASM5942 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-06-30
UASM5945 - Oecetis immobilis
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Sturgeon River
Collected ByNimmo, A.
Date Collected1963-06-28
Adult Seasonal Distribution
- Specimens collected within a specified date range, but specimens collected at the same date and location are counted as one specimen.
- All specimens collected within a specified date range