A taxonomic and ecological review of Pseudocloeon glaucum (Agnew) (Ephemeroptera : Baetidae)

Pseudocloeon masai (Lugo-Ortiz & McCafferty), P. nadineae (Lugo-Ortiz & McC afferty) and P. quintum (Agnew) are junior subjective synonyms of P. glaucu m (Agnew). Larvae of P. glaucum manifest a wide range of variation in mouth part morphology, particularly with respect to the development of the distom edial process of segment 2 of the labial palps, body size, general body col our and abdominal colour pattern. Such variation is observed in different c ohorts and populations, and explains why several names have been applied to the same species. Larvae of P. glaucum also have considerable ecological t olerance, accounting for the abundance and widespread distribution of the s pecies in the Afrotropical Region. New records from Kenya, Lesotho, Namibia and Zimbabwe are provided.