Agonum thoreyi

Dejean, 1828

Agonum thoreyi is a ground beetle in the Carabidae. In central Alberta marshes, it is one of four most abundant carabid species in emergent vegetation of flooded zones. It shows relatively even distribution across macrohabitats compared to , with preference for microsites featuring emergent substrate or dead vegetation piles. Its reproductive timing is later than sympatric Agonum nigriceps and A. ferruginosum. The species is .

Agonum thoreyi by (c) anonymous, some rights reserved (CC BY). Used under a CC-BY license.

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This image is created by user Dick Belgers at Waarneming.nl, a source of nature observations in the Netherlands.
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Pronunciation

How to pronounce Agonum thoreyi: /əˈɡoʊnəm ˈθɔːraɪaɪ/

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Identification

In central Alberta marshes, A. thoreyi can be distinguished from sympatric Agonum by its distribution: unlike A. nigriceps (abundant in emergent sedge tussocks) and A. ferruginosum ( in floating cattail mats), A. thoreyi is distributed fairly equally across macrohabitats. It is also distinguished by later reproductive timing and compared to A. nigriceps and A. ferruginosum.

Images

Habitat

Marshes in central Alberta, specifically emergent vegetation of flooded zones. Within these flooded areas, predominantly occupies microsites with emergent substrate or clumps of dead vegetation. Shows relatively even distribution across macrohabitats compared to .

Distribution

Holarctic distribution. Documented in Europe including (former) Yugoslavia, Albania, Austria; North America including Alaska; and Canada (central Alberta).

Seasonality

In central Alberta, and occur later than sympatric A. nigriceps and A. ferruginosum. activity pattern.

Life Cycle

Reproductive period and are later than those of sympatric Agonum nigriceps and A. ferruginosum in central Alberta marshes.

Behavior

. No perceptible differences in daily activity cycles compared to other Agonum studied in central Alberta. In laboratory conditions, climbing propensity on narrow vertical structures has been observed but is lower than that of A. nigriceps.

Ecological Role

One of four most abundant Carabidae in emergent vegetation of flooded marsh zones in central Alberta. Participates in resource partitioning within guild of marsh-dwelling Agonum species, with relatively use compared to more specialized .

Similar Taxa

Agonum nigricepsSympatric in central Alberta marshes; distinguished by A. nigriceps preference for emergent sedge tussocks, earlier , and higher climbing propensity on narrow vertical structures
Agonum ferruginosumSympatric in central Alberta marshes; distinguished by A. ferruginosum dominance in floating cattail mats and earlier reproductive timing

More Details

Study Limitations

Detailed ecological information is primarily derived from a single study in central Alberta marshes. Information on European and broader geographic range is limited to presence records without detail.