Analysis of Kozhowia Vasiljeva & Smirnov, 1969 (Chydoridae, Anomopoda, Branchiopoda), with a description of Parakozhowia n. gen.

The five endemic species of Kozhowia Vasiljeva & Smirnov, 1969 (Branchiopod a: Anomopoda: Chydoridae) are redescribed based on material from Lake Baika l, including types of all species. Two well-defined groups were found. A ne w genus Parakozhowia n.gen., with one species, P. baicalensis Vasiljeva & S mirnov, 1969 n. comb., is erected. An extended diagnosis for the genus Kozh owia is presented. Parakozhowia n. gen. differs from Kozhowia in (1) antenn al formula; (2) proportions of postabdomen; (3) number of setae on exopodit e IV; (4) presence of soft setae of endopodite IV; (5) presence of a limb V I, and (6) presence of an inflated rostrum in the adult male of Kozhowia. A n improved key for the discrimination of the species is given. Thoracic limbs of all species were given special attention. There are six s etae on exopodite IV in Parakozhowia n.gen., as normal for Aloninae, while only four setae and a rudimentary hillock were detected on exopodite IV in the species of Kozhowia. Kozhowia is a true member of the Aloninae, and the closest relative of Parakozhowia and Camptocercus, meaning that the diagno sis of the Aloninae must be amended: the number of setae on exopodite IV in Aloninae may vary from 4 to 6.