A short characterization of Macrothrix flabelligera Smirnov, 1992 (Cladocera, Macrothricidae) is presented, following a recent record of this species in Brazil. General aspects and morphological details of the body of parthenogenetic and ephippial females, as well as of males, are described and illustrated.
Cladocera; Macrothricidae; Macrothrix flabelligera; zooplankton
