SeasonalityAdults collected in Alberta from mid-May to early August, but seem to be most active in June.IdentificationAdults: 11.3-14.8mm in length. Entire dorsal surface black. Head and pronotum without hints of violet sometimes seen in C. purpuricollis frosti. Appendages black or piceous. Pronotum very distinct, transverse with widest point being slightly posterior to middle, sides almost evenly curved (C. purpuricollis frosti has sides that are much wider at base); basal margin almost straight; lateral rim very prominent in comparison to other Alberta species. In this species, pronotal punctures are quite large and shallow with very short pubescence, leaving only patches of disc smooth; basal fovea broad, irregular, not reaching centre of prothorax. Prosternum with sparse, course, shallow punctures. Microsculpture isodiametric, readily seen on pronotom and elytra. Intervals slightly convex and densely punctate; setae reddish. Adapted from Bell 1960 and Lindroth 1963.
Scientific NameChlaenius nigerHabitat
Very hydrophilus. Found in swamps and at the margins of small water bodies where vegetation is rich but incoherent (Lindroth 1963). Also taken at light.
Seasonality
Adults collected in Alberta from mid-May to early August, but seem to be most active in June.
Identification
Adults: 11.3-14.8mm in length. Entire dorsal surface black. Head and pronotum without hints of violet sometimes seen in C. purpuricollis frosti. Appendages black or piceous. Pronotum very distinct, transverse with…
Adults: 11.3-14.8mm in length. Entire dorsal surface black. Head and pronotum without hints of violet sometimes seen in C. purpuricollis frosti. Appendages black or piceous. Pronotum very distinct, transverse with widest point being slightly posterior to middle, sides almost evenly curved (C. purpuricollis frosti has sides that are much wider at base); basal margin almost straight; lateral rim very prominent in comparison to other Alberta species. In this species, pronotal punctures are quite large and shallow with very short pubescence, leaving only patches of disc smooth; basal fovea broad, irregular, not reaching centre of prothorax. Prosternum with sparse, course, shallow punctures. Microsculpture isodiametric, readily seen on pronotom and elytra. Intervals slightly convex and densely punctate; setae reddish. Adapted from Bell 1960 and Lindroth 1963.
Life History
Have been recorded swimming both near the shores of a flooded cypress swamp and in salt marshes.
Conservation
Relatively common.
Diet Info
Predatory, omnivorous.
Range
Widespread in northern and eastern North America. It is also known from Cuba. In Alberta it has been found as far north as George Lake.
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Citation
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Page Citation for Chlaenius niger
Page Citation
"Species Details - Chlaenius niger, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-6307. Accessed 28 Mar. 2024.
Authorship
NameHunting, W.
Rolespecies page author
Date2007
References
AuthorBousquet, Yves and Andre Larochelle
TitleCatalogue of the Geadephaga (Coleoptera: Trachypachidae, Rhysodidae, Carabidae Including Cicindelini) of America North of Mexico
Publication Date1993
Series TitleMemoirs of the Entomological Society of Canada
Pages1-397
AuthorBell, R. T.
TitleRevision of the genus Chlaenius Bonnelli (Coleoptera, Carabidae) in North America.
Publication Date1960
Series TitleMiscellaneous Publications of the Entomological Society of America.
Volume1
Pages98-170
AuthorLindroth, Carl H.
TitleThe Ground-beetles of Canada and Alaska. Part 6.
Publication Date1969
Series TitleOpuscula Entomologica
Volume34
Pages945-1192
Specimen Information
There are 46 specimens of this Species.
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46 results plotted on map in 13 markers. Note: Only records with latitude and longitude coordinates are plotted on map.