Introduction. The name of each listed species is followed by up to five sources that report the species as occurring in Michigan. Sources in all upper-case letters refer to specific insect collections: MSU-ARC refers to material held by the Michigan State University Arthropod Research Collection (data provided by G. Parsons). All others refer to collection data extracted from the Symbiota Collections of Arthropods Network (SCAN) database online at https://scan-bugs.org/. See the Methods page for a list of abbreviations and associated collections.
Species names preceded by a single '?' are considered probable (for occurring in Michigan) but uncertain records. Those preceded by '??' are considered possible but unlikely to occur in Michigan. Species that are fully accepted as having valid Michigan records are unmarked. Species reported in the literature that we consider to be erroneous Michigan records are in a separate list following the others.
STAPHYLINIDAE - OXYTELINAE
1 subfamily, 3 tribes, 10 genera, 43 species
Tribe Blediini
Bledius analis LeConte, 1863: Herman (2001), Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
?Bledius annularis LeConte, 1863: Hubbard and Schwarz (1878); known from several nearby locations in ON
Bledius assimilis Casey, 1889: Herman (2001), Bright (2015), Hubbard and Schwarz (1878), MSU-ARC
Bledius confusus LeConte, 1877: Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Bledius emarginatus (Say, 1831): Herman (2001), Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Bledius fumatus LeConte, 1863: Herman (2001), Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Bledius gravidus Casey, 1889: Herman (2001), Bright (2015), Downie and Arnett (1996)
Bledius ineptus Casey, 1889: Herman (2001), Bright (2015), Downie and Arnett (1996), MSU-ARC
Bledius melanocephalus (Say, 1823): Herman (2001)
Bledius omega Herman, 1983: Herman (2001), Bright (2015), Downie and Arnett (1996), MSU-ARC
Bledius philadelphicus Fall, 1919: Herman (2001), MSU-ARC
Bledius ruficornis LeConte, 1863: Herman (2001), Bright (2015), Downie and Arnett (1996), Hubbard and Schwarz (1878)
Bledius semiferrugineus LeConte, 1863: Herman (2001), Bright (2015), Hubbard and Schwarz (1878), MSU-ARC
Bledius tarandus Herman, 1970: Herman (2001), MSU-ARC
Bledius tau LeConte, 1877: Herman (2001), Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Bledius turgidus Casey, 1889: Herman (2001), Andrews (1923), Bright (2015), Downie and Arnett (1996), MSU-ARC
Tribe Euphaniini
??Syntomium confragosum Mäklin, 1852: Hubbard and Schwarz (1878); mostly a far NW sp. (Alaska to Alberta) but also reported from Quebec
Tribe Oxytelini
Anotylus exiguus (Erichson, 1840): Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC
Anotylus insignitus (Gravenhorst, 1806): Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC; considered to be cosmopolitan
Anotylus nanus (Erichson, 1840): Peck and Thomas (1998), Hubbard and Schwarz (1878), MSU-ARC
Anotylus rugosus (Fabricius, 1775): Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC
Anotylus suspectus (Casey, 1893): Ruesink and Parsons (2024), MSU-ARC
Anotylus tetracarinatus (Block, 1799): Ruesink and Parsons (2024), MSU-ARC
Apocellus sphaericollis (Say, 1831): Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC; 11 MI specimens in MSU coll. IDed by GLP
Carpelimus caseyi (Bernhauer, 1904): Herman (2001), Downie and Arnett (1996), Leng (1920)
Carpelimus delicatus (Casey, 1889): Herman (2001), Bright (2015), Leng (1920), Downie and Arnett (1996)
?Carpelimus facetus (Casey, 1889): Bright (2015), Downie and Arnett (1996); D&A has location MI (Lake Superior) which may refer to the Canadian side
??Carpelimus gracilis (Mannerheim, 1830): Downie and Arnett (1996), Leng (1920) as Trogophloeus gracilis Mann. by Leng; a Palaearctic sp. with poorly known NA distribution, could be in MI but good evidence lacking
Carpelimus morio (Erichson, 1840): Bright (2015), Leng (1920), Downie and Arnett (1996), MSU-ARC
?Carpelimus pudicus (Casey, 1889): MSU-ARC; a large difficult genus with inadequate keys, we cannot confirm the MSU specimen IDs
Carpelimus quadripunctatus (Say, 1831): Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC
?Carpelimus rivularis (Motschulsky, 1860): MSU-ARC; a large difficult genus with inadequate keys, we cannot confirm the MSU specimen IDs
?Carpelimus subtilis (Erichson, 1839): MSU-ARC; a large difficult genus with inadequate keys, we cannot confirm the MSU specimen IDs
?Ochthephilus planus (LeConte, 1861): Wolcott (1909), Hubbard and Schwarz (1878), Downie and Arnett (1996)
Oxytelus laqueatus (Marsham, 1802): Haack and Ruesink (2020), Hubbard and Schwarz (1878), Downie and Arnett (1996); the report by Hubbard and Schwarz was probably a misidentification as this Palaearctic species was first recorded in America in 1918
?Oxytelus pensylvanicus Erichson, 1840: Andrews (1923), Hubbard and Schwarz (1878), Downie and Arnett (1996)
Oxytelus sculptus Gravenhorst, 1806: Andrews (1923), Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC
Platystethus americanus Erichson, 1840: Hatch (1925), Hubbard and Schwarz (1878), MSU-ARC
Thinobius brachypterus LeConte, 1877: Herman (2001), Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Thinobius fimbriatus LeConte, 1877: Herman (2001), Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), Leng (1920)
??Thinobius flavicornis LeConte, 1877: Hubbard and Schwarz (1878) as Cryptobium flavicorne Lec.; a poorly known sp. with unknown distribution
??Thinodromus arcifer (LeConte, 1877): Hubbard and Schwarz (1878) as Trogophloeus arcifer Lec.; a poorly known sp. with a mostly SE distribution
??Thinodromus phloeoporinus (LeConte, 1877): Hatch (1925) as Trogophloeus phloeoporinus Lec.; described from IL & known from Manitoba to Newfoundland in Canada, MI record needs confirmation
The following species was also reported from Michigan, but we consider it to be adventive, a misidentification or other error:
Tribe Oxytelini
Anotylus nitidulus (Gravenhorst, 1802): Hubbard and Schwarz (1878) as Oxytelus nitidulus Grav.; a European sp. that should not be in MI
This family list was last updated: April 7, 2023