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.

The only way to be certain of species level identifications for much of this family is to dissect genitalia, which we have not done. Consequently, the Michigan records for some species are flagged as uncertain.

SCIRTIDAE

1 subfamily, 8 genera, 17 species

Subfamily Scirtinae

?Contacyphon nebulosus (LeConte, 1853): Hubbard and Schwarz (1878); common in WI (Young, 1988)

Contacyphon neopadi (Klausnitzer, 1976): Haack and Ruesink (2020), MSU-ARC

Contacyphon neovariabilis (Klausnitzer, 1976): Ruesink and Parsons (2024), MSU-ARC; also known from WI (Young, 1988)

Contacyphon obscurus (Guerin-Meneville, 1843): Haack and Ruesink (2020), Hubbard and Schwarz (1878), MSU-ARC

Contacyphon perplexus (Blatchley, 1914): Ruesink and Parsons (2024), MSU-ARC

Contacyphon variabilis (Thunberg, 1785): Haack and Ruesink (2020), Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC

Exneria ruficollis (Say, 1825): Ruesink and Parsons (2024), Hubbard and Schwarz (1878), MSU-ARC

Herthania confinis (Klausnitzer, 1976): Ruesink and Parsons (2024), MSU-ARC; a very poorly known species described from a single Allegheny Mountains specimen; we have not seen a record from anywhere else

Microcara explanata (LeConte, 1866): Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC

?Nyholmia collaris (Guerin-Meneville, 1843): MSU-ARC (?); IN & ON in Downie and Arnett (1996); ID of sole MSU female specimen by D. K. Young but labeled as uncertain

Nyholmia confusa (Brown, 1930): Young and Stribling (1990), Bright (2015), MSU-ARC

Prionocyphon discoideus (Say, 1825): Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC

Prionocyphon limbatus LeConte, 1866: Haack and Ruesink (2020), MSU-ARC

Sacodes pulchella(Guerin-Meneville, 1843): Ruesink and Parsons (2024), MSU-ARC

Sacodes thoracica (Guérin-Méneville, 1843): Haack and Ruesink (2020), Hubbard and Schwarz (1878), MSU-ARC

Scirtes orbiculatus (Fabricius, 1801): Townsend (1889), Hatch (1924), BugGuide, MSU-ARC

Scirtes tibialis Guérin-Méneville, 1843: Haack and Ruesink (2020), Hubbard and Schwarz (1878), MSU-ARC

The following species was also reported from Michigan, but we consider it to be adventive, a misidentification or other error:

Subfamily Scirtinae

Contacyphon padi (Linnaeus, 1758): Hubbard and Schwarz (1878), Leng (1920) [as Cyphon pusillus Lec. in Hubbard and Schwarz]; C. padi is Palearctic; it prob. does not occur in NA & all NA records refer to C. neopadi.

This family list was last updated: February 24, 2023