What is "pterostichinae"

Pterostichinae is a subfamily of ground beetles ( family Carabidae). It belongs to the advanced harpaline assemblage, and if these are circumscribed sensu lato as a single subfamily, Pterostichinae are downranked to a tribe Pterostichini. However, as the former Pterostichitae supertribe of the Harpalinae as loosely circumscribed does seem to constitute a lineage rather distinct from Harpalus, its core group is here considered to be the present subfamily and the Harpalinae are defined more narrowly.

They are usually mid-sized and rather stout ground beetles. Coloration is typically dark and without conspicuous patterns, but often with a strong sheen like polished metal. They are widely distributed and inhabit a wide range of terrestrial habitats. Unlike the more basal ground beetles which only eat small animals, the Pterostichinae include a large proportion of omnivorous or even herbivorous taxa.