FIGURE 9 in Identification key of Ctenopoda (Cladocera, Holopedidae, Sididae) taxa from Brazil with remarks on taxonomy and geographic distribution

FIGURE 9. Morphological traits used for separation of species of Diaphanosoma species. A, habitus showing characters used in identification of the species. B, Diaphanosoma birgei Korineck, 1981, outline of right valve, in ventral view, showing the point of gradual inflexion of the valve (arrow). C, idem, in higher magnification. D, Diaphanosoma spinulosum Herbst, 1967, posterior part of body, in ventral view; arrow showing the point where the valve bends, forming the flap-shaped inflexion. E, idem, in higher magnification. F, Diaphanosoma brevireme Sars, 1901, posteroventral part of valve showing the inflexion unfolded. G, Diaphanosoma birgei, posterior part of the valves, showing the position of the dorsal spines. H, Diaphanosoma birgei, with a single dorsal spine. I, Diaphanosoma spinulosum, with two dorsal spines. ds, dorsal spines (ganchos valvares). in, inflexion of the ventral margin of the valve, pvm, posteroventral margin of the valves.