One nymph and one exuviae of Acanthametropus pecatonica were collected in June 1991 from the Black River and Chippewa River, respectively. These specimens extend the known range of this rare species in Wisconsin to three large Mississippi River tributaries. Homoeoneuria ammophila was recorded in Wisconsin for the first time; nymphs were collected from the Black River and Sugar River. Nymphs of Macdunnoa persimplex, Metretopus borealis, Pentagenia vittigera, Pseudiron centralis, and Cercobrachys sp. were also encountered.
Lillie, Richard A.
"New and Additional Distribution Records for Several Rare Mayflies (Ephemeroptera) in Wisconsin,"
The Great Lakes Entomologist, vol 25
Available at: https://scholar.valpo.edu/tgle/vol25/iss2/11