Heptageniidae

Heptageniidae Temporal range:
Rhithrogena germanica
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Ephemeroptera
Suborder:	Pisciforma
Superfamily:	Heptagenioidea
Family:	Heptageniidae Needham, 1901
Genera
Acanthomola Afghanurus Afronurus Anepeorus Cinygma Cinygmula Darthus Ecdyonurus Electrogena Epeorus Heptagenia Ironodes Kageronia Leucrocuta Maccaffertium Macdunnoa Nixe Parafronurus Raptoheptagenia Rhithrogena Stenacron Stenonema

The Heptageniidae (synonym: Ecdyonuridae) are a family of mayflies with over 500 described species mainly distributed in the Holarctic, Oriental, and Afrotropical regions, and also present in the Central American Tropics and extreme northern South America. The group is sometimes referred to as flat-headed mayflies or stream mayflies. These are generally rather small mayflies with three long tails. The wings are usually clear with prominent venation although species with variegated wings are known. As in most mayflies, the males have large compound eyes, but not divided into upper and lower parts.

Heptageniids breed mainly in fast-flowing streams, but some species use still waters. The nymphs have a flattened shape and are usually dark in colour. They use a wide range of food sources with herbivorous, scavenging, and predatory species known.

The oldest described member of the family is Amerogenia from the Late Cretaceous (Turonian) aged New Jersey amber.

References

• Chinery, Michael (1986). Collins Guide to the Insects of Britain and Western Europe. London: Collins. ISBN 0-00-219170-9.
• McGavin, George C. (2005). Insects and Spiders. London: Dorling Kindersley. ISBN 1-4053-0596-7.
• Webb, J.M.; McCafferty W.P. (30 October 2008). "Heptageniidae of the World: Part II". Canadian Journal of Arthropod Identification: 1–55. doi:10.3752/cjai.2008.07. Retrieved 1 July 2011.
• Fauna Europaea
• Nomina Insecta Nearctica
• Data related to Heptageniidae at Wikispecies