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 25 Apr. 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.
UASM731 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM732 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM733 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM734 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM735 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM736 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM737 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM738 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM739 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM740 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM741 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Collected ByBall, G. E.
Date Collected1963-05-19
UASM742 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Date Collected1964-05-18/1964-05-20
UASM743 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Date Collected1964-05-18/1964-05-20
UASM744 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Date Collected1964-05-18/1964-05-20
UASM745 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Wabamun Lake
Date Collected1964-05-18/1964-05-20
UASM746 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Andrew Lake
Collected ByFinnamore, A. T.
Date Collected1988-06-18
UASM747 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Andrew Lake
Collected ByFinnamore, A. T.
Date Collected1988-06-15
UASM748 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Andrew Lake
Collected ByFinnamore, A. T.
Date Collected1988-06-15
UASM749 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Andrew Lake
Collected ByFinnamore, A. T.
Date Collected1988-06-15
UASM750 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Andrew Lake
Collected ByShpeley, D.
Date Collected1988-06-14/1988-06-18
UASM751 - Trachypachus holmbergi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Andrew Lake
Collected ByShpeley, D.
Date Collected1988-05-15