Callibaetis pictus
This record describes Callibaetis pictus (species). Recorded family: Baetidae. Recorded order: Ephemeroptera.
Identification and Appearance

This species has a distinctive pale (usually W-shaped) dorsal marking on tergite 6, and all but the very darkest specimens (usually males) also have those markings on tergites 5 and 9. --Lloyd Gonzales
Wikipedia reference for Callibaetis pictus: http://en.wikipedia.org/wiki/Callibaetis_pictus.
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Ephemeroptera (Mayflies)
- Suborder
- Pisciforma
- Family
- Baetidae (Small Minnow Mayflies)
- Genus
- Callibaetis
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
w. half of US & Mexico map
Additional species information
Species notes from the sources
Etymology: Callibaetis pictus (Eaton 1871)
About Mayflies: the wider group
Order-level background for Ephemeroptera, the group containing Callibaetis pictus. 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 Callibaetis pictus (3)
Photo credits: Contributed by tom murray; Additional contributions by Taxon , ceiseman , v belov
Frequently Asked Questions About Callibaetis pictus
What is Callibaetis pictus?
Callibaetis pictus is a species in the family Baetidae, within the order Ephemeroptera.
How do you identify Callibaetis pictus?
This species has a distinctive pale (usually W-shaped) dorsal marking on tergite 6, and all but the very darkest specimens (usually males) also have those markings on tergites 5 and 9. --Lloyd Gonzales
Where is Callibaetis pictus found?
Range: w. half of US & Mexico map
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