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For Insects, Spiders & Their Kin
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Calendar
Upcoming Events

Discussion of 2018 gathering

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

TaxonomyBrowseInfoImagesLinksBooksData

Species Cloeon dipterum

Mayfly - Cloeon dipterum Cloeon dipterum - female Cloeon dipterum - male Small Minnow Mayfly - Cloeon dipterum - female unknown mayfly - Cloeon dipterum Mayfly - Baetidae? - Cloeon dipterum small minnow mayfly - Cloeon dipterum - female small minnow mayfly - Cloeon dipterum - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Ephemeroptera (Mayflies)
Suborder Pisciforma
Family Baetidae (Small Minnow Mayflies)
Genus Cloeon
Species dipterum (Cloeon dipterum)
Synonyms and other taxonomic changes
Cloeon dipterum (Linnaeus)
Orig. Comb: Ephemera diptera Linnaeus, 1761
Syn: Cloeon cognatum Stephens 1835
Range
Holarctic, widespread Eurasia; Canada & ne. US(1) Map(2)
Season
May-Sep (BG data)
Life Cycle
Ovoviviparous, meaning a mated female holds her eggs internally until embryonic development is complete (about 18 days), after which she lays them in water and they hatch almost immediately: Video - Video credit: David H. Funk, Stroud Water Research Center
Remarks
First recorded in the US in 1953, in Illinois; now widespread. Probably introduced.