As one of the serial studies on the taxonomy of Canthocamptus mirabilis speciesgroup in South Korea, C. semicirculusKikuchi, widely distributed in the southernpart of the Far East, and C. coreensisn. sp. from the middle west of South Koreaare recorded...
As one of the serial studies on the taxonomy of Canthocamptus mirabilis speciesgroup in South Korea, C. semicirculusKikuchi, widely distributed in the southernpart of the Far East, and C. coreensisn. sp. from the middle west of South Koreaare recorded. Intraspecific variability of some important characters like outer caudalsetae and the spinous process of male leg 3 exopod was examined in Koreanpopulation of C. semicirculus. Canthocamptus coreensis n. sp. possesses theplesiomorphic characters of the round and narrow hyaline membrane of analoperculum and lacking the sexual reverse transformation in female caudal rami,while it also evolves the apomorphic ones of the modified outer apical setae of maleleg 4 exopod and the spinous process of male leg 3 exopod. A key to the fivespecies of the species group known from Korea is prepared.