Two new species of Mesocyclops from southern China and notes on the genus Mesocyclops in China

Two new Mesocyclops species, M. mariae n. sp. and M. shenzhenensis n. sp., are described from southern China, the former species from Guangxi province , the latter from Guangdong province. Both species have setules on the medi al margin of the caudal rami. Compared with each other, there are some cons picuous differences, such as the spinule pattern of the antenna basipodite, the structure of receptaculum seminis, the armature of coxopodite and basi podite of P4 and the armature of the caudal rami. The paper also compares t he two new species with their supposedly closest relatives, M. pseudospinos us Dussart & Fernando, 1988, M. leuckarti (Claus, 1857) and M. pehpeiensis Hu, 1943. In addition, other species of Mesocyclops in China are discussed and a key to 10 Chinese species of Mesocyclops is provided.