EphemeropteraHeptageniidae – Flatheaded Mayflies

Ecdyonurus simplicioides

This record describes Ecdyonurus simplicioides (species). Recorded family: Heptageniidae. Recorded order: Ephemeroptera.

Identification and Appearance

Ecdyonurus simplicioides - Ecdyonurus simplicioides
Contributed by Ken Wolgemuth; Additional contributions by v belov

Classification

Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Ephemeroptera (Mayflies)
Suborder
Pisciforma
Superfamily
Heptagenioidea
Family
Heptageniidae (Flatheaded Mayflies)
Genus
Ecdyonurus

Imported taxonomy record. Source availability varies; see the source references and editorial policy below.

Habitat and Range

Geographic Range

w.NA [ map ]

Additional species information

Species notes from the sources

Etymology: Ecdyonurus simplicioides (McDunnough 1924)

About Mayflies: the wider group

Order-level background for Ephemeroptera, the group containing Ecdyonurus simplicioides. 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.

Explore Ephemeroptera families and species →

Photos of Ecdyonurus simplicioides (5)

Ecdyonurus simplicioides - photo 1
Contributed by Ken Wolgemuth; Additional contributions by v belov
Ecdyonurus simplicioides - photo 2
Contributed by Ken Wolgemuth; Additional contributions by v belov
Ecdyonurus simplicioides - photo 3
Contributed by Ken Wolgemuth; Additional contributions by v belov
Ecdyonurus simplicioides - photo 4
Contributed by Ken Wolgemuth; Additional contributions by v belov
Ecdyonurus simplicioides - photo 5
Contributed by Ken Wolgemuth; Additional contributions by v belov

Photo credits: Contributed by Ken Wolgemuth; Additional contributions by v belov

How we use and review source data. Source count does not imply independent verification.

Photo credits: Contributed by Ken Wolgemuth; Additional contributions by v belov. Contributors retain copyright over their individual contributions.