Key for Alona s. lato species of South-East Asia

1. Lateral setulae of postabdomen weakly developed, thin, the longest setae located at the middle of group.............................................................................................. Alona guttat a Sars, 1982 s. lato

1'. Lateral setulae of postabdomen well-developed, distalmost setule is longer and thicker than others.....................2

2. Postabdomen widening distally, with maximum width at last quarter of postanal margin... Alona intermedia Sars, 1862 s. lato

2'. Postabdomen with parallel margins or with maximum width at the the middle of postanal margin...................... 3

3. Seta 1 of inner distal lobe of limb I thick, claw-like. Two main head pores............. Alona affinis (Leydig, 1860) s. lato

3'. Seta 1 of inner distal lobe of limb I thin. Three main head pores............................. Alona kotovi Sinev, 2012 .