The morphology of two marine pleurostomatid ciliates, Loxophyllum jini sp. n. and L. qiuianum sp. n., collected from coastal waters near Qingdao (Tsingtao), China, were investigated using observations in vivo and following protargol impregnation. Loxophyllum jini is identified by its large body size (about 300-600 μm long in vivo), multi-macronuclear nodules (8-17), several (3-7) contractile vacuoles along the dorsal margin of cell, and the somatic kineties on left (9-14) and right (13-20) side. As a new species, L. qiuianum distinguished from its congeners by a combination of characters including the marine habitat and the distribution of extrusomes, the terminal position of contractile vacuole and the numbers of somatic kineties on both the right and left sides (19-30 and 8-13).
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