Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
[cite:373560]
BG's standard ref of Ephemeroptera taxonomy (see Master List of Online Taxonomy References), maintained by Purdue Entomology. Jump to the species list (province/state records, synonyms)
http://www.entm.purdue.edu/mayfly/index.php