Key for identification of Cladocera of the subfamily Aloninae (Anomopoda: Chydoridae) from South-East Asia Author Sinev, Artem Y. text Zootaxa 2016 4200 4 451 486 journal article 10.11646/zootaxa.4200.4.1 385be9e3-2309-4de5-9bff-80f724cf4892 1175-5326 191528 5DF1767F-71A9-451F-A418-D1D47A853586 Matralona Van Damme & Dumont, 2009 Parthenogenetic female short description. Body oval, of moderate height ( Fig. 13 H); head and valves without keel. Sculpture of valves as weakly developed longitudinal lines. Posteroventral angle of valves without denticles. Rostrum short. Two main head pores with a narrow connection between them; lateral head pores minute. Labral keel wide ( Fig. 13 I), with rounded apex, with cluster of very long setulae on posterior margin. Postabdomen short and wide ( Fig. 13 J), with convex postanal margin and broadly rounded distal angle; length about 2–2.2 height in Asian species. Preanal angle well defined, postanal angle not defined. Postanal denticles short, in clusters. Postanal lateral groups of setulae with very long and thick distalmost seta; in distalmost groups length of setulae exceed two widths of base of postabdominal claw. Postabdominal claw short, curved, with short basal spine. Antennule without lateral aesthetascs, all terminal aesthetascs of similar length. Antennal seta without basal peg. Antenna with thin seta on basal segment of endopodite. Spine on basal segment of exopodite longer than middle segment. Spines on apical segments longer than apical segments. IDL of limb I with two setae ( Fig. 13 K); seta 1 absent, setae 2–3 thin, armed with thin setulae. Single species, Mathralona freyi (Idris & Fernando, 1981) ( Fig. 13 H–K). Length up to 0.36 mm . Rare endemic of South-East Asia, known from Penninsular Malaysia only. For description, see Sinev & Kotov (2012) .