On age morphological changes of males of Chydoridae (Cladocera)

Summary Young and adult males of 11 species of Chydoridae are studied, their figures being published here (fig. 1–15). The necessity is stressed to distinguish young forms of males and gynandromorphic individuals.Pleuroxus balatonicus is considered to be described from the population ofPleuroxus unicatus having under Balaton Lake conditions retarded transformation of young males into adult form, and accordingly having unusually numerous young males. qOqsqnqoqvqnqyye qryeqzquqlQjqtqaqtqy 11 (. 1–15). . , Pleuroxus uncinatus , Pleuroxus balatonicus.