Species Details
Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum Read more about this collection »
SeasonalityAdults have benn collected in April to June.
IdentificationThis is the only species of Trachypachus found in Alberta. The antennae only have scattered stiff setae, lacking dense, depressed pubescence on the outer seven antennomeres. The metacoxae are extended laterally to meet the margins of elytra. Black or very dark piceous, tibiae usually brownish, upper surface shiny brass. Prothorax with three lateral setigerous punctures each side; anterior and posterior margins fringed with short setae. Elytra with varying number (3-12) of irregular rows of punctures, effacing at apex. Length 3.8 to 5.8 mm.
Scientific Name
Trachypachus holmbergi
Habitat
A xerophilus species, on open or slightly shaded ground, usually moraine, with sparse vegetation.
Seasonality
Adults have benn collected in April to June.
Identification
This is the only species of Trachypachus found in Alberta. The antennae only have scattered stiff setae, lacking dense, depressed pubescence on the outer seven antennomeres. The metacoxae are extended laterally to…
This is the only species of Trachypachus found in Alberta. The antennae only have scattered stiff setae, lacking dense, depressed pubescence on the outer seven antennomeres. The metacoxae are extended laterally to meet the margins of elytra. Black or very dark piceous, tibiae usually brownish, upper surface shiny brass. Prothorax with three lateral setigerous punctures each side; anterior and posterior margins fringed with short setae. Elytra with varying number (3-12) of irregular rows of punctures, effacing at apex. Length 3.8 to 5.8 mm.
Life History
This species overwinters in the adult stage.
Conservation
Common.
Diet Info
Both larvae and adults are predatory.
Range
This species is found in Alaska and western United States and in western Canada, including the north. In Alberta this species is recorded from the Edmonton area and in the extreme north east corner of the provinve.
Citation
Page Citation for Trachypachus holmbergi
Page Citation
"Species Details - Trachypachus holmbergi, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-1540. Accessed 04 May. 2024.
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 64 specimens of this Species.
UASM752 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Andrew Lake
Collected ByShpeley, D.
Date Collected1988-05-15
UASM753 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Edmonton
Collected ByWhitehead, D. R.
Date Collected1969-04-30
UASM754 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Edmonton
Collected ByO'Hara, W. M.
Date Collected1979-06-16
UASM53337 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Chisholm
Collected ByPhillips, I. D.
Date Collected2002-06-26/2002-07-10
UASM145074 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: Oregon, Wasco county, Mount Hood National Forest
Collected ByPollock, D. A.
Date Collected1989-06-04
UASM145075 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: Oregon, Wasco county, Mount Hood National Forest
Collected ByPollock, D. A.
Date Collected1989-06-04
UASM145076 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: Oregon, Wasco county, Mount Hood National Forest
Collected ByPollock, D. A.
Date Collected1989-06-04
UASM145077 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: British Columbia, Creston
Collected ByAskevold, I.
Date Collected1980-07-10
UASM145078 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: California, Tuolumne county, Twain Harte
Collected BySpanton, T.; Brown, B. V.
Date Collected1986-06-15/1986-06-26
UASM145079 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: California, Tuolumne county, Twain Harte
Collected BySpanton, T.; Brown, B. V.
Date Collected1986-06-15/1986-06-26
UASM145080 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: California, Mono county, Sonora Pass
Collected BySpanton, T.; Brown, B. V.
Date Collected1986-06-16/1986-06-25
UASM145081 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: California, Mono county, Sonora Pass
Collected BySpanton, T.; Brown, B. V.
Date Collected1986-06-16/1986-06-25
UASM145082 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: California, Mono county, Sonora Pass
Collected BySpanton, T.; Brown, B. V.
Date Collected1986-06-16/1986-06-25
UASM145083 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: California, Mono county, Sonora Pass
Collected BySpanton, T.; Brown, B. V.
Date Collected1986-06-16/1986-06-25
UASM145084 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: Oregon, Wasco county, Mount Hood National Forest
Collected ByPollock, D. A.
Date Collected1989-06-02/1989-06-05
UASM333001 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Northwest Territories, Paradise Garden and Campground
Collected ByFrania, H. E.
Date Collected1978-07-30
UASM352354 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Waterton Lakes National Park, Waterton Park
Collected ByCarr, F. S.
Date Collected1932-07-10
UASM352355 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Edmonton
Collected ByCarr, F. S.
Date Collected1916-06-17
UASM352356 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Waterton Lakes National Park, Waterton Park
Collected ByCarr, F. S.
Date Collected1932-07-01
UASM352357 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Waterton Lakes National Park, Waterton Park
Collected ByCarr, F. S.
Date Collected1932-07-10
UASM352358 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Happy Valley
Collected ByCarr, F. S.
Date Collected1928-04-25