Identifier les larves de Leptophlebiidae sans branchies (Righetti) Clé de détermination italienne des imago de 1991 (D'Antonio) Order Ephemeroptera : les familles d'éphémères aux USA. Mayflies, with over 3,400 species, make up one of the oldest orders of insects, with the first fossils dating to about 275 million years ago.
They are hemimetabolous, without a pupal stage; however, they are unique in that they have a subimago stage, an extra life stage between the larva and the adult in which the insect has wings, but is still sexually immature. Most of their life is spent as aquatic larvae and most species spend only a few hours to no more than 3 days as flying adults.
Different families and genera can be found in a variety of flowing-water and some still-water habitats. They can be burrowers in loose sediments, flat-bodied sprawlers on rocks, or fish-like and very streamlined in shape, making good swimmers. Larvae can be easily identified by having only a single claw on each foot, gills on the top or sides of the abdomen, and the presence of two or three slender tails. Identification des familles - Amérique du Sud (Ricardo Figueroa & Elizabeth Araya) Première identification des imagos (pêche) Order Ephemeroptera - Mayflies- à la famille (USA) Other Common Names in angling/flyfishing, an adult mayfly (imago) is called a spinner; the winged pre-adult (subimago) is called a dun; and many species have common names(1) Synonyms and other taxonomic changes The classification/nomenclature in the Guide generally follows Mayfly Central(2) Explanation of Names Greek ephemeros 'of/for a day; short-lived' + pteron 'wing' -- refers to the short-lived adults ["ephemeros" comes from epi 'upon' + hemera 'day']
Indentification larves à la famille (Québec) Perla - identification au genre des inverstébrés aquatiques (France)