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.
LEIODIDAE
4 subfamilies, 9 tribes, 24 genera, 68 species
Subfamily Cholevinae
Tribe Anemadini
??Dissochaetus oblitus (LeConte, 1853): Hubbard and Schwarz (1878) as Ptomaphagus oblitus Lec. in Silphidae; record needs confirmation, not listed for MI in Peck and Newton (2017)
Nemadus brachyderus (LeConte, 1863): Peck and Newton (2017), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Nemadus hornii Hatch, 1933: Peck and Newton (2017), Downie and Arnett (1996)
Tribe Cholevini
Catops americanus Hatch, 1928: Andrews (1923), Hatch (1924), Ruesink and Parsons (2023), MSU-ARC
Catops basilaris Say, 1823: Peck and Newton (2017), Wolcott (1909), Andrews (1923), Hatch (1924), MSU-ARC
Catops gratiosus (Blanchard, 1915): Peck and Newton (2017)
Catops paramericanus Peck & Cook, 2002: Peck and Newton (2017)
Catops simplex Say, 1825: Peck and Newton (2017)
Prionochaeta opaca (Say, 1825): Peck and Newton (2017), Hatch (1924), Hubbard and Schwarz (1878), MSU-ARC
Sciodrepoides terminans (LeConte, 1850): Peck and Newton (2017), Hubbard and Schwarz (1878), Wolcott (1909), MSU-ARC
Sciodrepoides watsoni (Spence, 1813): Peck and Newton (2017), MSU-ARC
Tribe Ptomaphagini
Ptomaphagus brevior Jeannel, 1949: Peck and Newton (2017)
Subfamily Coloninae
Tribe Colonini
Colon asperatum Horn, 1880: Peck and Newton (2017), Peck and Stephan (1996), MSU-ARC
Colon bidentatum (Sahlberg, 1822): Peck and Newton (2017), Peck and Stephan (1996)
Colon dentatum LeConte, 1853: Peck and Newton (2017), Hubbard and Schwarz (1878), MSU-ARC
Colon horni Szymczakowski, 1981: Peck and Newton (2017), Peck and Stephan (1996)
Colon hubbardi Horn, 1880: Peck and Newton (2017), Peck and Stephan (1996), Downie and Arnett (1996)
??Colon magnicolle Mannerheim, 1853: Hubbard and Schwarz (1878), Downie and Arnett (1996); known from WI, MI record needs confirmation
Colon oblongum Blatchley, 1910: Downie and Arnett (1996)
??Colon schwarzi Hatch, 1933: Downie and Arnett (1996); record needs confirmation, MI not listed in Peck and Newton (2017)
Colon thoracicum Horn, 1880: Peck and Newton (2017), Peck and Stephan (1996)
Colon tibiale Hatch, 1957: Peck and Newton (2017), Peck and Stephan (1996)
Subfamily Leiodinae
Tribe Agathidiini
Agathidium angulare Mannerheim, 1852: Peck and Newton (2017)
Agathidium aristerium Wheeler, 1987: Peck and Newton (2017), MSU-ARC
Agathidium difforme (LeConte, 1850): Hubbard and Schwarz (1878), Downie and Arnett (1996); collected at Marquette
Agathidium exiguum F.E. Melsheimer, 1844: Peck and Newton (2017), Hubbard and Schwarz (1878), MSU-ARC
Agathidium mollinum Fall, 1934: Peck and Newton (2017)
Agathidium oniscoides Palisot de Beauvois, 1817: Peck and Newton (2017), Hubbard and Schwarz (1878)
??Agathidium revolvens LeConte, 1850: Wolcott (1909), Hubbard and Schwarz (1878), Downie and Arnett (1996); A. revolvens is said to be known only from the type location on the north shore of Lake Superior, but Hubbard and Schwarz report it from Isle Royale
Agathidium rubellum Fall, 1834: Peck and Newton (2017)
Anisotoma basalis (LeConte, 1853): Peck and Newton (2017), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Anisotoma bifoveata Wheeler, 1979: Peck and Newton (2017)
Anisotoma blanchardi (Horn, 1880): Peck and Newton (2017)
Anisotoma discolor (F.E. Melsheimer, 1844): Peck and Newton (2017), Hubbard and Schwarz (1878), MSU-ARC
Anisotoma errans Brown, 1937: Peck and Newton (2017)
Anisotoma geminata (Horn, 1880): Peck and Newton (2017)
Anisotoma globososa Hatch, 1929: Peck and Newton (2017), Andrews (1923), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Anisotoma obsoleta (Horn, 1880): Peck and Newton (2017), Hubbard and Schwarz (1878), MSU-ARC
Gelae parvulum (LeConte, 1878): Peck and Newton (2017), Hubbard and Schwarz (1878), Downie and Arnett (1996)
Tribe Leiodini
Anogdus obsoletus (F.E. Melsheimer, 1844): Peck and Newton (2017)
Anogdus potens (Brown, 1932): Peck and Newton (2017)
Cyrtusa subtestacea (Gyllenhal, 1813): Peck and Newton (2017), Hubbard and Schwarz (1878), MSU-ARC
Isoplastus fossor Horn, 1880: Peck and Newton (2017), Peck and Cook (2013), Downie and Arnett (1996), MSU-ARC
Leiodes assimilis (LeConte, 1850): Peck and Newton (2017), Baranowski (1993), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Leiodes collaris (LeConte, 1850): Peck and Newton (2017), Baranowski (1993), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Leiodes neglecta Baranowski, 1993: Peck and Newton (2017), Baranowski (1993)
Leiodes punctostriata Kirby, 1837: Peck and Newton (2017), Baranowski (1993), Hubbard and Schwarz (1878), MSU-ARC
Leiodes strigata (LeConte, 1850): Peck and Newton (2017), Baranowski (1993), Hubbard and Schwarz (1878), Downie and Arnett (1996)
Leiodes subtilicornis Baranowski, 1993: Peck and Newton (2017)
Leiodes triepkei (Schmidt, 1841): Peck and Newton (2017), Baranowski (1993)
Leiodes valida (Horn, 1880): Andrews (1923), MSU-ARC; MSU specimen from Whitefish Point in UP, also known across boreal Canada but few US records
??Liocyrtusa luggeri (Hatch, 1927): Downie and Arnett (1996) as Crytusa luggeri (Hatch); MI record needs confirmation, known from Quebec to BC across Canada
Lionothus forticornis Daffner, 1989: Peck and Cook (2013), Peck and Newton (2017)
Zeadolopus egenus (LeConte, 1853): Peck and Newton (2017), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tribe Pseudoleiodini
Colenis impunctata LeConte, 1853: Peck and Newton (2017), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tribe Scotocryptini
Aglyptinus laevis (LeConte, 1853): Peck and Newton (2017), Hubbard and Schwarz (1878), Peck (2004), MSU-ARC
Tribe Sogdini
??Hydnobius longidens LeConte, 1879: Peck and Cook (2009); Peck and Cook (2009) show a dot for this sp. on their distribution map but do not have it in the text where they report the known records
Hydnobius substriatus LeConte, 1863: Peck and Newton (2017), Peck and Cook (2009), Hubbard and Schwarz (1878)
Sogda obtusa (LeConte, 1879): Peck and Newton (2017), Peck and Cook (2009)
Triarthron lecontei Horn, 1868: Peck and Newton (2017), Peck and Cook (2009)
Subfamily Platypsyllinae
Leptinillus validus (Horn, 1872): Lawrence et al. (1965), Peck and Newton (2017), Downie and Arnett (1996)
Platypsyllus castoris Ritsema, 1869: Lawrence et al. (1965), Peck and Newton (2017), Peck (2006)
The following species were also reported from Michigan, but we consider them to be adventive, misidentifications or other errors:
Subfamily Cholevinae
Tribe Cholevini
Catops luteipes Thomson, 1884: Schwarz (1876), Hubbard and Schwarz (1878) as Catops brunneipennis Mannh. in Silphidae; an arctic sp., does not occur this far south
Tribe Ptomaphagini
Ptomaphagus consobrinus (LeConte, 1853): Hubbard and Schwarz (1878); a southern sp., should not be in MI
Subfamily Coloninae
Tribe Colonini
Colon celatum Horn, 1880: Peck and Newton (2017); other states all far west, perh. "MI" in their stated distribution was meant to read MT
Subfamily Leiodinae
Tribe Agathidiini
Agathidium politum LeConte, 1866: Hubbard and Schwarz (1878); A. politum is believed to be confined to PA (Peck & Newton 2017) and known only from the holotype
Anisotoma expolita Brown, 1937: Hubbard and Schwarz (1878), Downie and Arnett (1996) as Liodes polita Lec. in Silphidae; recorded from IL, IN, and southward, the Marquette record is very unlikely
Tribe Leiodini
Leiodes alternata Melsheimer, 1844: Hubbard and Schwarz (1878) as Anisotoma alternata Melsh. in Silphidae; occurs from OK-KY-PA and southward
This family list was last updated: January 6, 2023