Stenonema femoratum
This record describes Stenonema femoratum (species). Recorded family: Heptageniidae. Recorded order: Ephemeroptera.
Identification and Appearance
Adults have a combination of four diagnostic traits: (adapted from comment by Lloyd Gonzales here ) male: female:
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Ephemeroptera (Mayflies)
- Suborder
- Pisciforma
- Superfamily
- Heptagenioidea
- Family
- Heptageniidae (Flatheaded Mayflies)
- Genus
- Stenonema
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
Canada, e. US map
Additional species information
Species notes from the sources
Etymology: Stenonema femoratum (Say 1823)
About Mayflies: the wider group
Order-level background for Ephemeroptera, the group containing Stenonema femoratum. 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 Stenonema femoratum (3)
Photo credits: Contributed by Eric R. Eaton; Additional contributions by Robin McLeod , Vox Sciurorum , v belov
Frequently Asked Questions About Stenonema femoratum
What is Stenonema femoratum?
Stenonema femoratum is a species in the family Heptageniidae, within the order Ephemeroptera.
How do you identify Stenonema femoratum?
Adults have a combination of four diagnostic traits: (adapted from comment by Lloyd Gonzales here ) male: female:
Where is Stenonema femoratum found?
Range: Canada, e. US map