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Species Tasgius ater

Rove - Tasgius ater Tasgius melanarius? - Tasgius ater Rove Beetle - Tasgius ater Staph 101 - Tasgius ater Large Rove Beetle - Tasgius ater Beach staph - Tasgius ater Staphylinid - Tasgius ater Staphylinidae  - Tasgius ater
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Staphyliniformia)
Superfamily Staphylinoidea
Family Staphylinidae (Rove Beetles)
Subfamily Staphylininae (Large Rove Beetles)
Tribe Staphylinini
Subtribe Staphylinina
Genus Tasgius
Species ater (Tasgius ater)
Synonyms and other taxonomic changes
Ocypus ater
Explanation of Names
Tasgius ater (Gravenhorst 1802)
Size
15-20 mm
Identification
Pronotum shiny, with smooth midline like in the other species, with punctures of two sizes (diagnostic), larger punctures at least their diameter apart;
Mandibles with triangular tooth on inner margin (subgenus Tasgius s.str.);
Very helpful, and not in the books: Abdomen with several apparent tactile setae both laterally and dorsally; setae about as long as antennomere 3.
Range
native to w. Palaearctic, introduced elsewhere (NA, New Zealand); in our area, across Canada and in scattered US locations(1)
Habitat
under debris near water (including marine situations) but also common near habitations (in gardens, cellars, shacks)(1)
Remarks
first recorded in NA in 1802(1)
Internet References
Works Cited
1.Introduced Staphylinidae (Coleoptera) in the Maritime Provinces of Canada
Majka C.G., Klimaszewski J. 2008. The Canadian Entomologist 140: 48-72.
2.Staphylinidae of eastern Canada and the adjacent United States. Keys to subfamilies; Staphylininae: ...
Brunke A., Newton A., Klimaszewski J., Majka C.G., Marshall S. 2011. Canadian Journal of Arthropod Identification 12: 1-110.