Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Family Heptageniidae - Flatheaded Mayflies


Cinygma - female Cinygma - female Cinygma - female Cinygma - female Cinygma - female

Cinygmula subaequalis Cinygmula subaequalis Cinygmula subaequalis Cinygmula subaequalis Aprilfly - Cinygmula - male Cinygmula subaequalis mayfly - Cinygmula - male Flatheaded Mayfly - Cinygmula - female

Mayfly Nymph - Ecdyonurus Ecdyonurus - Ecdyonurus criddlei Ecdyonurus criddlei parastized by Symbiocladius sp. - voucher specimens, in alcohol - Ecdyonurus criddlei Ecdyonurus criddlei parastized by Symbiocladius sp. - voucher specimens, in alcohol - Ecdyonurus criddlei Ecdyonurus criddlei - voucher specimen, in alcohol - Ecdyonurus criddlei Ecdyonurus criddlei - voucher specimen, in alcohol - Ecdyonurus criddlei Ecdyonurus criddlei - voucher specimen, in alcohol - Ecdyonurus criddlei Ecdyonurus criddlei

Colorful Mayfly - Epeorus vitreus Smaller Mayfly - Epeorus namatus Mayfly- Any help appreciated.  - Epeorus Epeorus pleuralis Epeorus albertae - male Mayfly - Epeorus vitreus Ephemeroptera - Epeorus Brown Mayfly. Flat-headed? - Epeorus

unknown mayfly - Heptagenia flavescens Unknown Mayfly - Heptagenia elegantula Heptageniidae, genus Heptagenia - Heptagenia Heptagenia marginalis Heptagenia marginalis Oregon Mayfly - Heptagenia elegantula Heptagenia marginalis Mayfly - Heptagenia marginalis