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Genus Trechus

Trechus obtusus Erichson - Trechus obtusus Beetle - Trechus Carabidae, Trechus? - Trechus Trechinae? - Trechus Trechus Trechus apicalis - male Trechus chalybeus  - Trechus chalybeus Trechus obtusus - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga
Family Carabidae (Ground Beetles)
Subfamily Trechinae
Tribe Trechini
Genus Trechus
Explanation of Names
Trechus Clairville 1806
Greek 'runner'
Numbers
~70 spp. (of which 3 adventive) in 2 subgenera in our area, ~900 spp. in 8 subgenera worldwide (~90% of the spp. are in the nominate subgenus)(1)
Range
much of the world but >92% of spp. are Palaearctic; in our area, across NA, but by far most diverse in Appalachia (9 spp., incl. all three adventive ones, occur in Canada)(1)
Habitat
native spp. mostly in forest litter(2)
Works Cited
1.Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico
Bousquet Y. 2012. ZooKeys 245: 1–1722.
2.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.