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Species Details

Okanagana occidentalis

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

SeasonalityAdults emerge in July (Strickland 1953). IdentificationA mid- to large-sized Okanagana with a wingspan of about 60mm. Predominantly shiny black with orange segment borders and markings. O. rimosa is similar and sympatric to occidentalis in the western parts of the province, but occidentalis has a broader forewing (width:length ratio of 0.34 - 0.36, 0.29 - 0.31 in rimosa), and is shiny black rather than the dull black of rimosa. Compared to bella, occidentalis has a dense covering of long hairs on the underside of the abdomen, bella has only sparse, short hairs. The ventral plate of the terminal abdominal segment is doubly notched in female occidentalis, singly in bella (Davis 1919).
Scientific Name Okanagana occidentalis Habitat Likely restricted to montane grasslands in Alberta. Seasonality Adults emerge in July (Strickland 1953). Identification
A mid- to large-sized Okanagana with a wingspan of about 60mm. Predominantly shiny black with orange segment borders and markings. O. rimosa is similar and sympatric to occidentalis in the western parts of the…
A mid- to large-sized Okanagana with a wingspan of about 60mm. Predominantly shiny black with orange segment borders and markings. O. rimosa is similar and sympatric to occidentalis in the western parts of the province, but occidentalis has a broader forewing (width:length ratio of 0.34 - 0.36, 0.29 - 0.31 in rimosa), and is shiny black rather than the dull black of rimosa. Compared to bella, occidentalis has a dense covering of long hairs on the underside of the abdomen, bella has only sparse, short hairs. The ventral plate of the terminal abdominal segment is doubly notched in female occidentalis, singly in bella (Davis 1919).
Life History Unknown, but undoubtedly similar to other members of the genus. Conservation Status unknown. Diet Info Plant fluids. Specific hosts unknown. Range
Reported from Lethbridge in Alberta, but likely also occurs in the southwestern mountains, as it occurs throughout southern British Columbia. Found south through Washington, Oregon, Idaho, Montan, Nevada, Utah and…
Reported from Lethbridge in Alberta, but likely also occurs in the southwestern mountains, as it occurs throughout southern British Columbia. Found south through Washington, Oregon, Idaho, Montan, Nevada, Utah and California (Davis 1919, Simons 1954, Strickland 1953).

Citation

Page Citation for Okanagana occidentalis

Page Citation

"Species Details - Okanagana occidentalis, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-4218. Accessed 18 Apr. 2024.

Authorship

Name Schmidt, B. C.
Role species page author
Date 2003

References

Specimen Information

There are 5 specimens of this Species.

5 results plotted on map in 3 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM32604 - Okanagana occidentalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Gorge Creek Collected ByHocking, D. Date Collected1958-07-04

UASM32606 - Okanagana occidentalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Gorge Creek Collected ByHocking, D. Date Collected1958-06-22

UASM32607 - Okanagana occidentalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Gorge Creek Collected ByHocking, D. Date Collected1958-06-26

UASM32616 - Okanagana occidentalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Cardston Collected ByStrickland, E. H. Date Collected1940-06-20

UASM32623 - Okanagana occidentalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: British Columbia, Nelson Collected ByFletcher, J. Date Collected1899

Adult Seasonal Distribution