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Genus Stenacron

Mayfly, downtown Philadelphia - Stenacron Stream Mayfly - Stenacron Which Mayfly? - Stenacron - male Mayfly - Stenacron Mayfly Nymph - Stenacron Stenacron interpunctatum / frontale ♂ - Stenacron - male Leucrocuta - Stenacron - male Stenacron ? - Stenacron - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Ephemeroptera (Mayflies)
Suborder Pisciforma
Superfamily Heptagenioidea
Family Heptageniidae (Flatheaded Mayflies)
Genus Stenacron
Explanation of Names
Stenacron Jensen 1974
7 spp. in the genus, all in our area(1)(2)
The dark dash connecting cross-veins in the third space from the costal margin is a standard way of separating Stenacron adults from the very similar members of Maccaffertium. --Lloyd Gonzales
all spp. but one in e. NA(1)