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Family Ephemeridae - Common Burrower Mayflies

Mayfly - Hexagenia Mayfly - Hexagenia bilineata Shadfly?  - Hexagenia limbata Small Mayfly with Blue Eyes - Hexagenia Mayfly - Hexagenia bilineata Giant Mayfly (Hexagenia limbata)? - Hexagenia limbata Mayfly 3, Cooks Landing Park - Hexagenia - male 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)
Numbers
12 spp. in 3 genera in our area(1), 80 spp. in 7 genera total(2)
Size
10-30 mm
Identification
Size large; M and Cu veins in front wings strongly divergent(3); larvae have long cylidrical bodies, tapered at both ends, sharp mandibles that curve outward like tusks, long fringed antenna, three cauda (anal filaments); legs adapted for digging(4)
Range
worldwide(2)
Habitat
Streams, lakes and nearby; larvae burrow in sand, silt; adults come to lights
Season
Summer