The 13 states and primary ecoregions of the Upper Midwest region, showing collecting localities within the last ~20 years by the authors or their colleagues. Citations are the most comprehensive taxonomic works for states where our collecting effort was low. State abbreviations, IA: Iowa, IL: Illinois. IN: Indiana, KS: Kansas, KY: Kentucky, MI: Michigan, MN: Minnesota, MO: Missouri, NE: Nebraska, ND: North Dakota, OH: Ohio, SD: South Dakota, WI: Wisconsin.

 
 
  Part of: Houghton DC, DeWalt RE, Hubbard T, Schmude KL, Dimick JJ, Holzenthal RW, Blahnik RJ, Snitgen JL (2022) Checklist of the caddisflies (Insecta, Trichoptera) of the Upper Midwest region of the United States. In: Pauls SU, Thomson R, Rázuri-Gonzales E (Eds) Special Issue in Honor of Ralph W. Holzenthal for a Lifelong Contribution to Trichoptera Systematics. ZooKeys 1111: 287-300. https://doi.org/10.3897/zookeys.1111.72345