The 13 states of the Upper Midwest region delineated by location and by the results of an NMDS ordination of caddisfly species presence or absence per state. Total number of species for each state in parentheses. State abbreviations in Fig. 1.

 
 
  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