Twenty-nine monophyletic species groups based on the study of nearly 200 species of the Ephemeroptera family Heptageniidae from North and Central America, Africa, Eurasia, and Southeast Asia were ...

Taxa that are comparatively treated belong to basal clades within a monophyletic subset of genera of Heptageniidae having, for example, an apically adenticulate outer incisor and scattered setae ...