This flagellated protozoa was observed from a perchlorate treating laboratory scale anaerobic bioreactor (ORP~ -200 mV) fed with acetate as substrate. It was characterized by a pair of anterior flagella, tailing body and intracellular starch granules. Krishnakumar B and Anupama V.N. of NIIST (CSIR) are involved in the bioreactor study. The phase contrast image shows cells with intracellular starch granules and the same released to the medium.