Baetidae from Sabah (east Malaysia) (Ephemeroptera)

Abstract

The nymphs of five new species from Sabah /E. Malaysia/ included in four genera of the family Baetidae are described in detail. They are: Platybaetis probus sp.n., Baetis borneoensis sp.n., Baetis sabahensis sp.n., Pseudocloeon proxinium sp.n., Centroptella pusilla sp.n. These newly described species are the first nymphal species records of baetine mayflies from Sabah and Borneo. The phylogenetic allocations to species groups and the affinities of the Baetidae from Sabah with previously described baetid species from the Sunda Islands, the Philippines, W. Malaysia, Sri Lanka /Müller-Liebenau, in press/ and the Bismarck Archipelago are discussed.