Larval growth and development of Stenacron interpunctatum was studied for a one year period at Wildcat Creek, Indiana. Analysis of developmental stages and sue classes revealed three broods at different degrees of maturation at any one time of year. Broods emerged in early spring, mid-summer, and late summer-early fall, respectively; the former two overwintering in different stages of larval development, and the latter completing development in one growing season in warm temperatures and maturing at relatively smaller sizes. The population possessed a complex life cycle ranging from one generation per year to three generations every two years. General sampling over three growing seasons and controlled laboratory rearing support the conclusions.
McCafferty, W. P. and Huff, B. L. Jr
"The Life Cycle of the Mayfly Stenacron Interpunctatum (Ephemeroptera: Heptageniidae),"
The Great Lakes Entomologist, vol 11
Available at: https://scholar.valpo.edu/tgle/vol11/iss4/1