EphemeropteraHeptageniidae – Flatheaded Mayflies

Maccaffertium carlsoni

This record describes Maccaffertium carlsoni (species). Recorded family: Heptageniidae. Recorded order: Ephemeroptera.

Identification and Appearance

Maccaffertium carlsoni - Maccaffertium carlsoni
Contributed by Lloyd Gonzales

Classification

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

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

Habitat and Range

Geographic Range

Common to mountain streams of South Carolina and Georgia.

Additional species information

Species notes from the sources

Etymology: Originally Stenonema carlsoni Lewis 1974; named for Paul H. Carlson, who reared the type specimens from Wildcat Creek, South Carolina.

About Mayflies: the wider group

Order-level background for Ephemeroptera, the group containing Maccaffertium carlsoni. 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 Maccaffertium carlsoni (4)

Maccaffertium carlsoni - photo 1
Contributed by Lloyd Gonzales
Maccaffertium carlsoni - photo 2
Contributed by Lloyd Gonzales
Maccaffertium carlsoni - photo 3
Contributed by Lloyd Gonzales
Maccaffertium carlsoni - photo 4
Contributed by Lloyd Gonzales

Photo credits: Contributed by Lloyd Gonzales

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

Photo credits: Contributed by Lloyd Gonzales. Contributors retain copyright over their individual contributions.