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Abstract:
A number of Perlidae are recorded from Sumatra, an unidentified species of Phanoperla and Phanoperla simplex Zwick for the first time. Descriptions of several species are supplemented. Neoperla inutilis Zwick and N. separanda Zwick are raised to species rank. New species described are Neoperla flavicincta Zwick, N. sitahoanensis Sivec, and N. diebli Sivec. The new data suggest closer affinities than previously known between the Sumatran, Malay Peninsula and Bornean faunae.
