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 Heptageniidae (also known as Ecdyonuridae) is a family of mayflies with over 500 described species found primarily in the Holarctic, Oriental, and Afrotropical regions, as well as Central American Tropics and extreme northern South America.