Family: Ephemerellidae

Spiny Crawler Mayflies

These photos supplement pages 49-62 of the Guide to Aquatic Invertebrates of the Upper Midwest. Information on the biology of Ephemerellidae can be found on page 57.

 

Ephemerellidae

 

Ephemerellidae gills

 

Ephemerellidae genus without operculate gills