Paramecium nephridiatum Gelei, 1925, was rediscovered. it is a euryhaline b
rackish-water species that morphologically resembles Paramecium woodruffi,
but with multiple contractile vacuole pores. The general morphology, morpho
metry, and random amplified polymorphic DNA (RAPD) fingerprint patterns are
presented for a number of the stocks collected around the world.