A new species of paracalanid calanoid copepod Parvocalanusleei sp. n., is described from specimens collected in shallow waters of Western Korea. The new species is closely similar to Parvocalanusarabiensis (Kesarkar & Anil, 2010), Parvocalanuscrassirostris (F. Dahl, 1894), Parvocalanuslatus Andronov, 1972, and Parvocalanusscotti (Früchtl, 1923) in having two short terminal spines on the distal segment of the fifth leg and a similar rostrum in the female, but can be readily distinguished from its congeners by the body size, relative length of antennules, segmentation of endopod of leg 1, and pattern of ornamentation of spinules on legs 1 to 4 in the female. The taxonomic position of Parvocalanusarabiensis and the validity of the genus Parvocalanus Andronov, 1970 are also discussed.
Keywords: Calanoida; Copepoda; Korea; Paracalanidae; Paracalanus; Parvocalanus; new species; taxonomy.