Cryobius
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Pterostichus brevicornis
Woodland ground beetle
Pterostichus brevicornis is a circumpolar ground beetle in the family Carabidae, subgenus Cryobius. It is one of the most abundant and widespread tundra beetles, occurring across Arctic and Subarctic regions from Newfoundland to the Kola Peninsula and Arctic Ocean islands. The species exhibits high genetic and morphological variability across its range, with 23 documented COI haplotypes. It is cold-adapted with a two-year life cycle involving summer breeding and winter hibernation of both adults and larvae.
Pterostichus ventricosus
Pterostichus ventricosus is a species of woodland ground beetle in the family Carabidae. It is found in North America, with distribution records from Alaska, Canada, and the contiguous United States. The species was described by Eschscholtz in 1823. It belongs to the subgenus Cryobius within the genus Pterostichus, a diverse group of ground beetles.