Dyschirius (Dyschiriodes) subarcticus
Geographic: NEA
Distribution: Holarctic. Canada – NT, YT; USA – AK.
Common name: Subarctic Discolored Beetle
Synonym: Dyschirius subarcticus Lindroth, 1961:151
Macrohabitat: Lowlands, 1 – 233 meters altitude, on banks of rivers and
brooks, but not close to the water. Microhabitat: Adults are ground-dwelling on exposed or
shaded moist very fine sandy substrate, bare or with sparse vegetation.
Dispersal abilities: Macropterous, probably capable of flight; slow runners, strong burrowers.
Seasonal occurrence: Adults have been found in June – September; teneral adults
in August. Behavior: Adults are mostly nocturnal, sometimes active in the sunshine, predaceous,
and take cover during the day in burrows they dig into the substrate. Populations of
this species are associated with staphylinids (Bledius ssp.). Adults overwinter in the substrate.