Hexagenia bilineata
This record describes Hexagenia bilineata (species). Recorded family: Ephemeridae. Recorded order: Ephemeroptera.
Identification and Appearance

two dark spots in the disk of the hindwing are characters of Hexagenia bilineata (comment by Lloyd Gonzales on this image )
Wikipedia reference for Hexagenia bilineata: http://en.wikipedia.org/wiki/Hexagenia_bilineata.
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Ephemeroptera (Mayflies)
- Suborder
- Furcatergalia
- Superfamily
- Ephemeroidea
- Family
- Ephemeridae (Common Burrower Mayflies)
- Genus
- Hexagenia
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
e. NA to sw. US & Mexico map
Additional species information
Species notes from the sources
Etymology: Hexagenia bilineata (Say 1824)
About Mayflies: the wider group
Order-level background for Ephemeroptera, the group containing Hexagenia bilineata. Species-specific details appear above.
Group overview
Ephemeroptera (mayflies) includes ~3,500 described species. Adult mayflies are famous for their extraordinarily short lifespans - some species live as adults for only 5 minutes to 24 hours, the shortest adult lifespan of any insect.
Ecological role of the group
Mayfly nymphs spend 1-2 years developing in freshwater before emerging as adults. They are key bioindicators - their presence indicates clean, well-oxygenated water. They are also a primary food source for freshwater fish.
Economic and practical significance of the group
Mayfly hatches are so massive they appear on weather radar - a 2014 Mississippi River hatch near La Crosse, Wisconsin was tracked by the National Weather Service. Mass emergences can cause slippery road conditions and traffic hazards.
Recorded sources for this group: National Weather Service, EPA bioassessment protocols. Imported estimates may describe particular regions or reporting periods.
Photos of Hexagenia bilineata (3)
Photo credits: Contributed by tom murray; Additional contributions by Robin McLeod , v belov
Frequently Asked Questions About Hexagenia bilineata
What is Hexagenia bilineata?
Hexagenia bilineata is a species in the family Ephemeridae, within the order Ephemeroptera.
How do you identify Hexagenia bilineata?
two dark spots in the disk of the hindwing are characters of Hexagenia bilineata (comment by Lloyd Gonzales on this image )
Where is Hexagenia bilineata found?
Range: e. NA to sw. US & Mexico map
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