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Genus Hexagenia

Mayfly at lights - Hexagenia limbata Small Mayfly with Blue Eyes - Hexagenia What Mayfly species? - Hexagenia Brown and tan mayfly - Hexagenia bilineata Hexagenia sp. - Hexagenia Mayfly - Hexagenia bilineata Hexagenia bilineata ? - Hexagenia bilineata Hexagenia limbata
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Ephemeroptera (Mayflies)
Suborder Furcatergalia
Infraorder Scapphodonta
Superfamily Ephemeroidea
Family Ephemeridae (Common Burrower Mayflies)
Genus Hexagenia
Explanation of Names
Hexagenia Walsh 1863
Numbers
5 spp. in our area(1), 8 total(2)
Size
14‒30 mm
Identification
Several species dark with bold pattern as imagoes. Pale brown band across abdomen. Antennae, legs, and tails yellow. H. limbata very large (18‒30 mm), widespread in east; H. bilineata smaller, 14‒18 mm, common in southeast.
Range
New World(2); in our area, all spp. occur in the east, H. limbata throughout NA, H. bilineata ranges to sw. US(1)
Habitat
streams, lakes
Season
May‒Sep
Life Cycle
Eggs dropped on water and sink. Larvae burrow in muddy bottoms of streams, lakes at depths up to 20 m. Larval stage usually lasts 1 yr, perhaps two in north. Alates emerge in evening, come to lights, often far from water.