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Morphological and molecular delimitation of Spirostomum species is currently under debate. We addressed species boundaries within… Expand Species of Spirostomum Ehrenberg, 1838 are widely used as model organisms in ecological studies of environmental impacts and… Expand Two Spirostomum species collected from freshwater in Korea were identified as S. caudatum (Muller, 1786) and S. teres (Claparede… Expand Summary.Among ciliate genera, only Paramecium and Euplotes species have been studied extensively as host organisms of bacterial… Expand In several respects, notably the high velocity of shortening, Ca2+ dependence, and ATP independence, contraction of Spirostomum… Expand Previous studies have shown that the ciliated protozoan Spirostomum ambigum shows a gradually decreasing probability of… Expand A microphotometric method is introduced that allows measurement of the contraction‐relaxation kinetics of Spirostomum in response… Expand SummaryThe photodynamic action inSpirostomum ambiguum has been studied measuring the time lagτ between a flash of visible light… Expand 1. Spirostomum shows differential responses to localized mechanical and chemical stimuli. 2. The entire body surface is sensitive… Expand