The genus Pseudomugil is revised and compared with its nominal sister groups. Popondichthys and Kiunga. which were previously placed within the family Melanotaeniidae . Pseudomugil, as a result of this study. is considered to belong to a distinct Old World atherinoid family. Pseudomugilidae. having two subfamilies. Pseudomugilinae and Kiunginae. with 13 species included in the first and 1 in the second . A key for and a full description of all the presently known species and their phenetic relationships are presented . P. helodes is no longer recognized as a member of the family Pseudo- mugilidae and is placed into the family of sailfin silversides, Telmatherinidae .