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Leptophlebiidae is a family belonging to the Ephemeropterans that are commonly known as the prong-gilled mayflies or leptophlebiids.It is the only family in the superfamily Leptophlebioidea. [1]
The name Ephemeroptera is from the Greek ἐφήμερος, ephemeros "short-lived" (literally "lasting a day", cf. English "ephemeral"), and πτερόν, pteron, "wing", referring to the brief lifespan of adults. The English common name is for the insect's emergence in or around the month of May in the UK. [54]
The taxon Neoptera was proposed by А.М. Martynov in 1923 and 1924, in the following classification: [1] [2]. Pterygota. division Palaeoptera. order Odonata; order Agnatha (correct name: Ephemeroptera)
A Guide to Common Freshwater Invertebrates of North America. McDonald and Woodward. Blacksburg, Va. 2002. 2 - Merritt and Cummins. An Introduction to the Aquatic insects of North America 3rd ed. Kendall Hunt. Dubuque, Iowa. 1996. 3- Brady, Valerie. "Ephemeroptera- the mayflies." 4/27/16.
Ephemera danica can reach an imago size of 15–20 mm (0.6–0.8 in) in males, while females are larger, reaching 16–25 mm (0.6–1.0 in). This mayfly, with its characteristic markings and three tails (), is the most commonly seen of British Ephemeridae.
Ephemera vulgata is found throughout most of Europe. It mostly breeds in sluggish rivers and still waters such as ponds. This species is in decline, probably because of pollution of waterways by pesticides and heavy metals, and because the adult insects are disorientated by light pollution.
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Nymph. The mature adult stage of Hexagenia limbata can be as much as 27 cm (10.6 in) long. The females tend to be slightly larger than the males but have smaller eyes. The forewings are long and membranous while the hind wings are much smaller and have dark margins.