An examination of samples of Ephemeroptera larvae taken from 19 sites on the Pere Marquette River, Mason County, Michigan in October, 1990 and May, 1991 by A. G. B. Primack (Indiana University, Bloomington) revealed the presence of Pseudiron centralis McDunnough. This species was taken at seven sites between State Highway M37 and Rainbow Rapids, east of Ludington.
McCafferty, W. P.
"The Sand-Dwelling Predatory Mayfly Pseudiron Centralis in Michigan (Ephemeroptera: Pseudironidae),"
The Great Lakes Entomologist: Vol. 25
, Article 10.
Available at: http://scholar.valpo.edu/tgle/vol25/iss2/10