Biosystematic study of Rotifera in the northeastern of Markazy province of Iran

This study was done regarding to lack of information on the faun of Rotifera of Iran island water of Markazy province limit. Sampling was carried out from the April to September of 2015.Samples were have taking of outmost one meter depth of sampling station using plankton net with 55 μ mesh in daylight. Samples were fixed in 4% formaldeid and transferred to laboratory for taxonomic studings. This study conducted to identification of 6 species of Rotifers from 4 genus belonging to 3 families.(Asplanchna amphora, Plationus polyacanthus, Asplanchna priodonta, Proales Theodora, Brachionus plicatilis, Brachionus bidentatus). Between studied samples Brachionidae family and Brachionus genus have a great variety.