A new marine peritrich ciliate, Pseudovorticella sinensis n. sp. was isolated from a shrimp-farming pond in the littoral area of Qingdao, China. The morphology, infraciliature, and silverline system were studied based on living and silver-impregnated specimens. This species is characterized by (1) an elongated bell-shaped body that measures 50–60 × 35–45 μm in vivo, (2) one large, ventrally located contractile vacuole, and (3) a pellicle covered by a layer of transparent, cortical vesicles. The number of transverse silverlines from the peristomial area to the aboral ciliary wreath is 26–32, and from the aboral ciliary wreath to the scopula is 12–15. The stalk measures about 160–250 μm long × 5–6 μm wide. The spasmoneme has one row of conspicuous thecoplasmic granules, which are about 0.8 μm in diameter.