Studies by Eaton (1884), Dodds (1923) and Needham (1905, 1927) have contributed much to our knowledge of the nymphal forms of Ephemerella occurring in Western North America. Needham's recent paper on “The Rocky Mountain species of the Mayfly genus Ephemerella” contains a valuable discussion of the nymphs of that region and is the first attempt to treat of the species in a comparative manner.
No takes yet. Share an insight, caveat, or question.
G. Stuart Walley (1930) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: