Ametropus albrighti is shown to be a junior subjective synonym of A. neavei, n. syn. Ametropus neavei sensu lato demonstrates stable structural characteristics with respect to male genitalia and larval morphology, whereas degree of maculation and therefore abdominal patterning varies both among populations and within populations. Ametropus ammophilus is distinctive, and the two North American species are apparently allopatric based on known distributions, which are reviewed.
McCafferty, W. P.
"Commentary on Ametropus Species (Ephemeroptera: Ametropodidae) in North America,"
The Great Lakes Entomologist, vol 34
Available at: https://scholar.valpo.edu/tgle/vol34/iss2/1