Moina Macrocopa (Straus, 1820) (Branchiopoda, Anomopoda) in South America: Another Case of Species Introduction?

AbstractMoina macrocopa hitherto unrecorded from the Neotropical Region is reported from Corrientes, northern Argentina. The features exhibited by the specimens found, which are described and illustrated, differ from that of M. m. americana, distributed in North America, and agree with those of the typical form. This apparent discrepancy and the probable introduction from the Old World are discussed. A key to the species of Moina occurring in South America is presented.