family

Stream Mayflies

Heptageniidae

Field notes

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.

Children

Maccaffertium 11 native
Leucrocuta 8 native
Epeorus 7 native
Heptagenia 6 native
Light Cahills 3 native
Nixe 2 native
Stenonema 1 native
March Browns 1 native
Cinygmula 1 native
Thalerosphyrus
Anepeorus
Iron
Cinygma
Ecdyonurinae
Ironodes
Paegniodes
Gondwanan Flatheads
Spinadis

Range

United States

Greener is more native, amber more introduced; paler is less certain. How this was decided

Most observed native stream mayflies All

Native to the US, by observations.

Epeorus longimanus 37 observations
Cinygmula subaequalis 6 observations