The imago, nymph, and egg of Macdunnaa brunnea n. sp. are described from the south- eastern U.S. Heptagenia persimpiex is transferred to Macdunnoa and additional diagonostic characters are given for this species and for Macdunnoa nipawinia. The relationship of Macdunnoa to Stenacron and Stenonema is discussed.
Flowers, R. W.
"Review of the Genus Macdunnoa (Ephemeroptera: Heptageniidae) with Description of a New Species From Florida,"
The Great Lakes Entomologist, vol 15
Available at: https://scholar.valpo.edu/tgle/vol15/iss1/2