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.

HALIPLIDAE

3 genera, 19 species

Brychius hungerfordi Spangler, 1954: Grant and Vande Kopple (2009), van Vondel (2017), Bright (2015), Downie and Arnett (1996), MSU-ARC; listed as a Federally endangered species in 1994 per Grant and Vande Kopple (2009)

Haliplus blanchardi Roberts, 1913: van Vondel (2017), Bright (2015), MSU-ARC

Haliplus borealis LeConte, 1850: van Vondel (2021), Bright (2015), Hubbard and Schwarz (1878)

Haliplus connexus Matheson, 1912: van Vondel (2017), Bright (2015), Downie and Arnett (1996), MSU-ARC

Haliplus cribrarius LeConte, 1850: van Vondel (2017), Bright (2015), Hickman (1930), Hubbard and Schwarz (1878), MSU-ARC

Haliplus fasciatus Aubé, 1838: van Vondel (2017), Bright (2015), Hubbard and Schwarz (1878)

Haliplus fulvus (Fabricius, 1801): van Vondel (2017), Bright (2015)

Haliplus immaculicollis Harris, 1828: Merritt et al. (2002), van Vondel (2017), Bright (2015), Hickman (1930), MSU-ARC

Haliplus leopardus Roberts, 1913: van Vondel (2021); based on 1 specimen from Chippewa Co. in the Snow Collection (Univ. Kans.)

Haliplus longulus LeConte, 1850: van Vondel (2017), Bright (2015), Andrews (1923), Downie and Arnett (1996), MSU-ARC

Haliplus nitens LeConte, 1850: van Vondel (2021), Haack and Ruesink (2020), Bright (2015), Downie and Arnett (1996)

Haliplus pantherinus Aubé, 1838: van Vondel (2017), Bright (2015), Downie and Arnett (1996), MSU-ARC

Haliplus triopsis Say, 1823: van Vondel (2017), Bright (2015), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC

Peltodytes duodecimpunctatus (Say, 1823): van Vondel (2021), Bright (2015), Hickman (1930), MSU-ARC

Peltodytes edentulus (LeConte, 1863): van Vondel (2017), Bright (2015), Hickman (1930), Hubbard and Schwarz (1878), MSU-ARC

Peltodytes muticus (LeConte, 1863): van Vondel (2017), Bright (2015), Downie and Arnett (1996), MSU-ARC

Peltodytes pedunculatus (Blatchley, 1910): van Vondel (2017), Bright (2015), Downie and Arnett (1996), MSU-ARC

Peltodytes sexmaculatus Roberts, 1913: van Vondel (2017), Bright (2015), Hickman (1930)

Peltodytes tortulosus Roberts, 1913: van Vondel (2017), Bright (2015), Hatch (1924), Downie and Arnett (1996), MSU-ARC

The following species were reported from Michigan, but we consider them to be adventive, misidentifications or other errors:

Haliplus punctatus Aubé, 1838: Hubbard and Schwarz (1878); P. punctatus is a SE sp.; should not be in MI

Haliplus ruficollis (DeGeer, 1774): Andrews (1923), Adams (1909), KU:SEMC; H. ruficollis is a Eurasian sp. not known from NA

This family list was last updated: November 23, 2022