Encyclopedia of South American Aquatic Insects: Ephemeroptera

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After a general introduction to the study of Ephemeroptera, the mayflies, it provides illustrated keys for the identification of all species in South America that were described by the beginning of 2002. The many illustrations facilitate identification of a mayfly specimen to species with reasonable certainty if the life stage has been described. If it has not been described, that is also clear from the information in the keys, letting taxonomists know where future studies would be fruitful.