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Genus Stenus

rove beetle - Stenus rove beetle - Stenus Rove Beetle - Stenus Stenus semicolon LeConte - Stenus semicolon Stenus? - Stenus Stenus annularis - Stenus Stenus croceatus - Stenus Upshur County Stenus - Stenus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Staphyliniformia)
Superfamily Staphylinoidea (Rove, Carrion and Fungus Beetles)
Family Staphylinidae (Rove Beetles)
Subfamily Steninae (Water Skaters)
Genus Stenus
Synonyms and other taxonomic changes
Subgenera are understood to be artificial(1)
Explanation of Names
Stenus Latreille 1797
Numbers
one of the largest beetle genera, with ~170 spp. in our area and ~2200 spp. worldwide(1)
Identification
Adults have unique protrusible labium used in prey capture(1)
Range
worldwide and throughout NA(1)
Habitat
most spp. preferred wet habitats; several spp. prey on low vegetation rather than on the ground
Remarks
northern hemisphere spp. are arranged into 6 groups (useful, but not necessarily natural) traditionally called subgenera, based on 3 character states:
abdomen with or without complete margin on sides;
hind tarsi about 2/3 or up to half the length of corresponding tibia;
tarsomere 4 simple to slightly notched or deeply divided into lobes.
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.