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Abstract:
In 1983 six plankton samples were collected by Dr. J. A. Nunes de Mello from Jatapú and Uatumã
Rivers and these were examined for rotifers. 39 taxa were identified among which, Brachionus adisi n. sp.,
is a new species, and Microcodon clavus EHRENBERG, 1830 and also Monommata actices MYERS,
1930, are new records for the Neotropical region.