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Species Details
Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum Read more about this collection »
SeasonalityAdults of this species have been collected from May to September.
IdentificationSimilar to fossifrons, differing in the following points: more slender, especially prothorax; tibiae usually darker, at least in outer half; prothorax with longer, almost parallel-sided constriction at base, anterior transverse impression, often entirely diappeared, impunctate; and elytral microsculpture clearly transverse. Elytral microsculpture transverse. Length 8.3-12 mm.
Scientific Name
Patrobus stygicus
Habitat
Borders of standing and slow running water, on soil often peaty and dense vegetation present.
Seasonality
Adults of this species have been collected from May to September.
Identification
Similar to fossifrons, differing in the following points: more slender, especially prothorax; tibiae usually darker, at least in outer half; prothorax with longer, almost parallel-sided constriction at base, anterior…
Similar to fossifrons, differing in the following points: more slender, especially prothorax; tibiae usually darker, at least in outer half; prothorax with longer, almost parallel-sided constriction at base, anterior transverse impression, often entirely diappeared, impunctate; and elytral microsculpture clearly transverse. Elytral microsculpture transverse. Length 8.3-12 mm.
Life History
Overwinters in the both larval (predominant) and adult stages.
Conservation
Common.
Diet Info
Both larvae and adults are predatory.
Range
This species is found in Alaska and Wyoming, and northeastern Unites States, and most of Canada. In Alberta this species is found throughout the province.
Citation
Page Citation for Patrobus stygicus
Page Citation
"Species Details - Patrobus stygicus, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-2572/9-38963. Accessed 18 Apr. 2025.
References
Author
Bousquet, Yves and Andre Larochelle
Title
Catalogue of the Geadephaga (Coleoptera: Trachypachidae, Rhysodidae, Carabidae Including Cicindelini) of America North of Mexico
Publication Date
1993
Series Title
Memoirs of the Entomological Society of Canada
Pages
1-397
Author
Lindroth, Carl H.
Title
The Ground-beetles of Canada and Alaska. Part 2.
Publication Date
1961
Series Title
Opuscula Entomologica
Volume
20
Pages
1-200
Specimen Information
There are 814 specimens of this Species.
UASM39341 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39342 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39343 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39344 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39345 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39346 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39347 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39348 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39349 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39350 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39351 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39352 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39353 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39354 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39355 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39356 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20
UASM39357 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Pembina River
Collected ByBall, G. E.
Date Collected1957-06-09
UASM39358 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Pembina River
Collected ByBall, G. E.
Date Collected1957-06-05
UASM39359 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Pembina River
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-21
UASM39360 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Pembina River
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-21
UASM39361 - Patrobus stygicus
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fawcett
Collected ByAllen, R. T.; Ball, G. E.; Whitehead, D. R.
Date Collected1964-06-20