Pissodes schwarzi

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

Common NameYosemite Bark Weevil SeasonalityPissodes schwarzi are known to be in flight in July and August. IdentificationPissodes schwarzi is morphologically very similar to Pissodes strobi (Stewart and Bright, 1982). Pissodes schwarzi are small weevils with white and brown spots covering their body. Two spots on the posterior end of the elytra (wing cover) are usually conspicuous. Generally P. schwarzi are slightly larger and has a darker body colour than P. strobi but these are not good characters to distinguish the two.

Scientific Name Pissodes schwarzi Common Name Yosemite Bark Weevil Habitat Pissodes schwarzi can be found in coniferous forest of North America (O'Brien, 1989). Seasonality Pissodes schwarzi are known to be in flight in July and August. Identification

Pissodes schwarzi is morphologically very similar to Pissodes strobi (Stewart and Bright, 1982). Pissodes schwarzi are small weevils with white and brown spots covering their body. Two spots on the posterior end of the elytra (wing cover) are usually conspicuous. Generally P. schwarzi are slightly larger and has a darker body colour than P. strobi but these are not good characters to distinguish the two.

Life History

Pissodes schwarzi is a close relative of P. strobi but it does not cause the same extensive damage to host trees. This is because P. schwarzi feeds on the boles and roots of the tree instead new branches (Smith and Sugden, 1969). The lack of distinguishing morphological characters that allow for identification of this species is compounded by the fact that this species can interbreed readily with close relatives, including P. strobi (Lewis et al. 2000).

Conservation Presently, there are no known conservation concerns regarding P. schwarzi. Diet Info Pissodes schwarzi feed on Pine trees (Smith and Sugden, 1969). Range Pissodes schwarzi occurs in western Canada and the United States. In British Columbia, Alberta, and Saskatchewan in Canada, and in Washington, Oregon, Idaho, and California in the U.S.A (Langor and Sperling, 1995).

Page Citation

"Species Details - Pissodes schwarzi, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-5805. Accessed 13 Mar. 2025.

References

Author Smith, S. G. and B. A. Sugden

Title Host trees and breeding sites of native North American Pissodes bark weevils, with a note on synonom

Publication Date 1969

Author Langor, D. W. and F. H. Sperling

Title Mitochondrial DNA variation and identification of bark weevils in the Pissodes strobi group in western Canada (Coleoptera: Curculionidae).

Publication Date 1995

Author Stewart, W. E. and D. E. Bright

Title Notes on Pissodes fiskei (Coleoptera: Curculionidae) with a redescription of the specie

Publication Date 1982

Author Lewis, K. G., Y. A. El-Kassaby, R. I. Alfaro and S. Barnes

Title Population Genetic Structure of Pissodes strobi (Coleoptera: Curculionidae) in British Columbia, Canada.

Publication Date 2000

Author O’Brien, C. W.

Title Revision of the Weevil Genus Pissodes in Mexico with notes on neotropical Pissodini (Coleoptera, Curculionidae

Publication Date 1989

3 results plotted on map in 2 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM8657 - Pissodes schwarzi

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Waterton Lakes National Park, Waterton Collected ByCarr, F. S. Date Collected1931-07-15

UASM8658 - Pissodes schwarzi

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Waterton Lakes National Park, Waterton Collected ByCarr, F. S. Date Collected1931-07-15

UASM8659 - Pissodes schwarzi

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Cypress Hills Collected ByCarr, F. S. Date Collected1925-07-03

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Species Details