Agabus tristis
Aubé, 1838
Agabus tristis is a predaceous diving beetle in the Dytiscidae. It belongs to the tristis group, which has a Holarctic distribution. The species occurs in North America and the Palearctic region. It is one of two North American members of the tristis group, alongside A. leptapsis.
Pronunciation
How to pronounce Agabus tristis: /ˈæɡəbʊs ˈtrɪstɪs/
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Identification
A. tristis belongs to the tristis group, which can be distinguished using diagnostic characters presented in the species group key of the North American revision. Specific distinguishing features from the similar A. leptapsis are detailed in the taxonomic revision.
Habitat
Aquatic , as characteristic of the Dytiscidae.
Distribution
Holarctic; present in North America and the Palearctic region (Europe and Northern Asia).
Ecological Role
Predatory aquatic .
Similar Taxa
- Agabus leptapsisThe other North American member of the tristis group; distinguished by characters detailed in the taxonomic revision.
More Details
Taxonomic revision
The was revised in a 1989 paper in The Canadian Entomologist as part of a series revising Nearctic Agabus species. The revision includes distribution maps and ecological summaries for North American .