Amara quenseli

(Schönherr, 1806)

Quensel's seed-eating ground beetle

Amara quenseli is a seed-eating ground beetle in the Carabidae. The exhibits wing , with containing (long-winged), brachypterous (short-winged), and intermediate forms. Two are recognized: A. q. quenseli and A. q. silvicola. It is one of the few carabid beetles known from Iceland, where its wing has been studied in relation to stability.

Reitter Amara u.a. by Edmund Reitter
. Used under a Public domain license.

Reitter-1908 table20 by Edmund Reitter
. Used under a Public domain license.

Pronunciation

How to pronounce Amara quenseli: /æˈmɑːrə ˈkwɛnzɛli/

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Identification

Identification requires examination of genitalia and other subtle morphological characters typical of the Amara. The belongs to the subgenus Paracelia. In Iceland, individuals can be scored for wing length (, brachypterous, or intermediate), though this trait is not diagnostic for species-level identification.

Images

Habitat

In Iceland, the occupies of varying ages and stability levels. The frequency of long-winged () individuals correlates with the relative age and stability of the habitat, suggesting adaptive plasticity in capability.

Distribution

Europe, Northern Asia (excluding China), and North America. Specific records include Iceland, Alaska, Albania, Austria, Belarus, and the former Yugoslavia.

Diet

Seed-eating (granivorous), as characteristic of the Amara.

Behavior

Females show a higher frequency of macroptery than males, with a seasonal decline in winged forms. This sexual difference is thought to reflect differing activity patterns between sexes. The wing represents an adaptive response to environmental conditions rather than indicating age.

Ecological Role

As a granivorous ground beetle, likely contributes to seed and potentially to weed seed biocontrol in agricultural and natural systems.

Similar Taxa

Other Amara speciesMany Amara share similar external ; definitive identification requires examination of male genitalia and other fine structural characters.

More Details

Wing polymorphism

A. quenseli in Iceland shows geographic variation in wing : macroptery ranges from <1% to 28%, brachyptery from 14% to 43%. This variation is adaptive and environmentally responsive.

Subspecies

Two recognized: Amara quenseli quenseli (Schönherr, 1806) and Amara quenseli silvicola Zimmermann, 1832.