RT Journal Article SR Electronic(1) A1 Lu, Xiaoteng A1 Shao, Chen A1 Yu, Yuhe A1 Warren, Alan A1 Huang, JieYR 2015 T1 Reconsideration of the ‘well-known’ hypotrichous ciliate Pleurotricha curdsi (Shi et al., 2002) Gupta et al., 2003 (Ciliophora, Sporadotrichida), with notes on its morphology, morphogenesis and molecular phylogeny JF International Journal of Systematic and Evolutionary Microbiology, VO 65 IS Pt_9 SP 3216 OP 3225 DO https://doi.org/10.1099/ijs.0.000377 PB Microbiology Society, SN 1466-5034, AB The oxytrichid species Pleurotricha curdsi ( Shi et al., 2002 ) Gupta et al., 2003 , isolated from a tributary of the Yangtze River in the Mudong district of Chongqing, southern China, was reinvestigated with emphasis on its morphology, morphogenesis and small-subunit (SSU) rDNA-based phylogeny. Compared with three previously described populations, the Mudong population of P. curdsi is characterized by its large body size, 170–295 × 65–110 μm in vivo, and by having a variable number of right marginal rows, either two or three. Likewise, the number of right marginal rows anlagen (RMA) is also variable, i.e. usually two, but sometimes several small extra anlagen that give rise to the formation of the third row, are present to the left of the RMAs. We posit that the Mudong population is an intermediate form between the three previously described populations. Phylogenetic analyses based on the SSU rDNA sequence data show that all populations of P. curdsi cluster with the type species of the genus, Pleurotricha lanceolata, in a clade nested within the Oxytrichidae., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijs.0.000377