The morphology of the hypotrichous ciliate Uroleptus limnetis and the organization pattern of its cortical ciliature were revealed by using scanning electron microscopy and direct fluorescent labelling of FLUTAX.The ventral cortical ciliature was composed of adoral zone of membranelles (AZM),undulating membranes (UM),frontal-ventral-transverse cirri (FVTC),left and right marginal cirri (LMC,RMC),and the base-associated microtubules were visualized.The results useful for further clarifying the morphology of Uroleptus and the research of phylogenetics.