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Genus Pterostichus

Carabid - Pterostichus tristis Ground beetle - Pterostichus Black ground beetle - Pterostichus melanarius carabids in house - Pterostichus Pterostichus melanarius - male Pterostichus castaneus Carabid - Pterostichus CARABIDAE		Pterostichus mutus		Woodland Ground Beetle - Pterostichus caudicalis
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Carabidae (Ground Beetles)
Subfamily Harpalinae
Supertribe Pterostichitae
Tribe Pterostichini (Woodland Ground Beetles)
Genus Pterostichus
Numbers
ca. 180 spp. in 23 subgenera in our area(1)(2), ~2000 in Eurasia
subgenera not yet in the guide(3):
Pseudoferonina 9 spp. Pacific Northwest
Identification
Mentum tooth emarginate at apex; inner lobe of the maxilla prolonged into a heavily sclerotized, arched, inwardly directed tooth which appears hooked; terminal segment of all palpi cylindrical or fusiform; antennae pubescent from and including the fourth segment; prothorax with single or double laterobasal fovea and with two lateral setae; elytral epipleura crossed. Most species with abbreviated scutellar stria with an ocellate puncture at its base; first metatarsal segment usually with external furrow.
Range
Holarctic + adjacent parts of the Oriental & Neotropical regions(1)
Works Cited
1.American Beetles, Volume I: Archostemata, Myxophaga, Adephaga, Polyphaga: Staphyliniformia
Arnett, R.H., Jr., and M. C. Thomas. (eds.). 2000. CRC Press LLC, Boca Raton, FL.
2.Phylogeny and classification of Hypherpes auctorum (Coleoptera: Carabidae: Pterostichini: Pterostichus)
K.W. Will & A.S. Gill. 2008. Annals of Carnegie Museum. 77(1): 93-127.
3.Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico
Bousquet Y. 2012. ZooKeys 245: 1–1722.