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 - PAEDERINAE
3 tribes, 15 genera, 62 species
Tribe Lathrobiini
Achenomorphus corticinus (Gravenhorst, 1802): Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC
Astenus americanus (Casey, 1905): Ruesink and Parsons (2023b), MSU-ARC
?Astenus binotatus (Say, 1823): Hubbard and Schwarz (1878); IN in D&A
Astenus brevipennis (Austin, 1877): Andrews (1923), Hubbard and Schwarz (1878), Evans (2014), MSU-ARC
Astenus discopunctatus (Say, 1831): Andrews (1923), Hatch (1925), Downie and Arnett (1996), MSU-ARC
??Astenus longiusculus (Mannerheim, 1830): Hubbard and Schwarz (1878) as Sunius longiusculus Mannh.
?Astenus prolixus (Erichson, 1840): Andrews (1923), Hubbard and Schwarz (1878); IN in D&A, IL in GBIF,SCAN
Lathrobium amplipenne Casey, 1905: Ruesink and Parsons (2023b), MSU-ARC; originally described from the Hudson Valley in NY, also known from Ontario & New Brunswick
Lathrobium armatum Say, 1830: Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC
Lathrobium debile LeConte, 1880: Casey (1905), Ruesink and Parsons (2023b), MSU-ARC; described from Detroit material
Lathrobium fauveli Duvivier, 1883: Adams (1909), Andrews (1923), Ruesink and Parsons (2023b), MSU-ARC
Lathrobium innocens Casey, 1905: Casey (1905), Downie and Arnett (1996), MSU-ARC; described from Michigan (Marquette) material
Lathrobium nigrolineum (Casey, 1905): Ruesink and Parsons (2023b), MSU-ARC; MB in GBIF & original description, we are not aware of any records except Manitoba
??Lathrobium obtusum Casey, 1905: Andrews (1923); MA & MB in D&A (1996) so it might be in MI, but an Andrews specimen from Whitefish Point in MSU-ARC has been IDed by GLP as L. fauveli instead
?Lathrobium othioides LeConte, 1880: Downie and Arnett (1996)
??Lathrobium puncticolle Kirby, 1837: Hubbard and Schwarz (1878); a very poorly known sp.; not in any key we could find
?Lathrobium simile LeConte, 1863: Hubbard and Schwarz (1878); IN in D&A 1996, ON in GBIF, IL in SCAN
?Lathrobium sparsellum Casey, 1905: Ruesink and Parsons (2023b), MSU-ARC; only MB in SCAN, GBIF & original description, but Bousquet (2013) has it across most of southern Canada
Lathrobium spissicorne Casey, 1905: Casey (1905), Leng (1920), Downie and Arnett (1996), MSU-ARC; Detroit mentioned in original description
??Lathrobium tenue LeConte, 1863: Hubbard and Schwarz (1878); described from one NY specimen
Lithocharis nigriceps Kraatz, 1859: Ruesink and Parsons (2023b), MSU-ARC; IL, OH in D&A 1996
Lithocharis ochracea (Gravenhorst, 1802): Hubbard and Schwarz (1878), Leng (1920), Ruesink and Parsons (2023b), MSU-ARC; IN in D&A 1996 (cosmopolitan)
Lobrathium collare (Erichson, 1840): Andrews (1923), Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC
Lobrathium grande (LeConte, 1863): Watrous (1981), Casey (1905), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Lobrathium longiusculum (Gravenhorst, 1802): Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC
Pseudolathra ambigua (LeConte, 1880): Downie and Arnett (1996), MSU-ARC
Pseudolathra americana (Duvivier, 1883): Townsend (1889), Ruesink and Parsons (2023b), MSU-ARC
Pseudolathra barda (Casey, 1905): Ruesink and Parsons (2023b), MSU-ARC; PA in D&A 1996
?Scopaeus exiguus Erichson, 1840: Hubbard and Schwarz (1878)
?Scopaeus notangulus Casey, 1905: Downie and Arnett (1996); in the original description Casey (1905) states the range as Iowa to Lake Superior.
??Tetartopeus angularis (LeConte, 1863): Andrews (1923), Hubbard and Schwarz (1878) as Lathrobium or Stilicus angulare Lec.; a Mexican sp.?
Tetartopeus captiosus Casey, 1905: Watrous (1980), Andrews (1923), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tetartopeus floridanus Casey, 1905: Watrous (1980), MSU-ARC
Tetartopeus niger (LeConte, 1863): Watrous (1980), Casey (1905), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tetartopeus nitidulus (LeConte, 1880): LeConte (1880), Leng (1920), MCZ; described from MI, lectotype in MCZ
Tetartopeus rubripennis Casey, 1905: Watrous (1980), Downie and Arnett (1996), MSU-ARC
Tetartopeus tetricus Casey, 1905: Watrous (1980), Downie and Arnett (1996), MSU-ARC
Tribe Paederini
?Homaeotarsus badius (Gravenhorst, 1802): Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC; a difficult genus that needs study; this sp. is very similar to H. strenuus, so consider this ID as tentative
Homaeotarsus bicolor (Gravenhorst, 1802): Andrews (1916), Hatch (1925), Hubbard and Schwarz (1878), MSU-ARC; a very common sp. in MI, odd that it has not appeared in more recent literature
Homaeotarsus capito (Casey, 1885): Ruesink and Parsons (2023b), MSU-ARC
Homaeotarsus cinctus (Say, 1830): Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC
Homaeotarsus cribratus (LeConte, 1863): Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC
??Homaeotarsus floridanus (LeConte, 1878): Downie and Arnett (1996) as Lathrobium (Tetartopeus) floridanum LeConte; FL is only other location
?Homaeotarsus lecontei (Horn, 1885): Ruesink and Parsons (2023b), MSU-ARC; a difficult genus that needs study, consider this ID as tentative
Homaeotarsus pallipes (Gravenhorst, 1802): Hatch (1925), Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC
Homaeotarsus parallelus (Casey, 1885): Ruesink and Parsons (2023b), MSU-ARC; a difficult genus that needs study, consider this ID as tentative
Homaeotarsus sellatus (LeConte, 1863): Andrews (1916), Hatch (1925), Ruesink and Parsons (2023b), MSU-ARC
Ochthephilum fracticorne (Paykull, 1800): Downie and Arnett (1996)
??Ochthephilum pusillum (LeConte, 1863): Andrews (1916) as Cryptobium pusillum Lec.
Orus dentiger (LeConte, 1880): Herman (1965), MSU-ARC
Orus rubens (Casey, 1905): Ruesink and Parsons (2023b), MSU-ARC
Paederus iowensis (Casey, 1905): Ruesink and Parsons (2023b), MSU-ARC; ON, MN, PA in SCAN
Paederus littorarius Gravenhorst, 1806: Haack and Ruesink (2020), Andrews (1923), Hatch (1925), Hubbard and Schwarz (1878), MSU-ARC
Paederus palustris Austin, 1877: Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC; IN, IA in D&A
Rugilus angularis (Erichson, 1840): Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
?Rugilus biarmatus (LeConte, 1880): Andrews (1923), MSU-ARC; MSU has 3 specimens that probably are this species but we are not certain the IDs are correct
Rugilus dentatus Say, 1831: Andrews (1923), Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC
Rugilus orbiculatus (Paykull, 1789): Hoebeke (1995), MSU-ARC
Rugilus rudis (LeConte, 1863): Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC
Sunius confluentus (Say, 1831): Andrews (1923), Hubbard and Schwarz (1878), Hatch (1925), Ruesink and Parsons (2023b), MSU-ARC
Tribe Pinophilini
??Palaminus normalis LeConte, 1878: Hubbard and Schwarz (1878); a SE/Gulf species that probably should not be this far north
Palaminus testaceus Erichson, 1840: Hubbard and Schwarz (1878), Ruesink and Parsons (2023b), MSU-ARC; IN in D&A
The following species were also reported from Michigan, but we consider them to be adventive, misidentifications or other errors:
Tribe Lathrobiini
Astenus linearis (Erichson, 1840): Hubbard and Schwarz (1878) as Sunius linearis Er.; presumably A. americanus which was not described until later
Eustilicus tristis (Melsheimer, 1844): Andrews (1916) as Stilicus tristis Melsh.; northern limit for this species is near the Ohio River, MSU has two Andrews specimens from the Charity Islands labeled as this sp. but they are actually Lobrathium grande
Tribe Paederini
Rugilus lacustrinus (Casey, 1905): Downie and Arnett (1996); Downie and Arnett (1996) misinterpreted "Lake Superior (Bayfield)" in Casey (1905) as MI when it's actually WI
This family list was last updated: April 28, 2023