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DOI: 10.1080/00222930701689937. Kotov, A. A. 2008: Importance of male and ephippial female characters for differentiating three Palaearctic species of Macrothrix Baird, 1843 (Cladocera : Anomopoda), with a redescription of Macrothrix dadayi Behning, 1941, Annales de Limnologie, 44: 45-61 DOI: 10.1051/limn:2008022. Two new species of Cladocera were found -during an intensive study of Malaysian zooplankton. Macrothrix malaysiensis sp, nov. is unique in the genus in 'possessing a characteristic posterodorsal spine on the carapace. The structure of the antennules is also diagnostic. Alonafreyi sp. nov. closely resembles A. verrucosa Sars and A. rigidicaudis (Smirnov). R. macrothrix The illicium of this species measures 109-144% of the standard length. There are 11-20 relatively long filaments along the distal 28-57% of its length, which are darkly pigmented in the largest fish and may be forked and/or have a tiny swelling at the tip. There are also 3-4 short, unpigmented filaments at the tip of the illicium. Kotov, A. A. 2008: Importance of male and ephippial female characters for differentiating three Palaearctic species of Macrothrix Baird, 1843 (Cladocera : Anomopoda), with a redescription of Macrothrix dadayi Behning, 1941, Annales de Limnologie, 44: 45-61 DOI: 10.1051/limn:2008022 The rare Macrothrix tripectinata Weisig, 1934 is redescribed on material from the East Pamirs (Tajikistan) and Tuva (Russia). Adult and juvenile parthenogenetic females and adult males were studied using optical microscopy and SEM. The thoracic appendages and the molar surface of mandibles were investigated in detail. Selected 'conventional' diagnostic features are critically reviewed. The Looking over the Massey Creek valley, just upstream of its confluence with the Broken River. Services provided by Astrebla included the preparation of a ground-truthed RE map for 13, 900 ha of vegetation in the proposed Collinsville Irrigation Area, and threatened flora species surveys across the entire project area. Macrothrix flabelligera grown at 23.0 Chad a generation time of 4.9 days, shorter than those recor- ded in the literature for the species of Daphnidae. At a slightly higher temperature (25.0 C), Daphnia gess- neri, D. ambigua and D. laevis had longer generation times (see Table 3) than that of M. flabelligera grown at 23.0 C. frequent encounter with these was in contrast to very rare species such as Macrothrix sp., Chydorus sp., Eucyclops sp., Tropodiaptomus stuhlmanni, Synchaeta pectinata and Harpacticoid copepods. Distribution of computed diversity indices indicated generally lower diversity at pelagic (UP series) compared to littoral (UL series) stations (Figure 2). We redescribe Macrothrix rosea (females and males) based on material collected in Belgium. We also compare seven populations of Macrothrix `triserialis' from different parts of the world, including a topotypical population of M. triserialis s. str. from Sri Lanka, and males from South India (here first described), relying heavily on the structure of the trunk limbs, beside classical features Genus: Macrothrix Species: Macrothrix paulensis. Name . Macrothrix paulensis (Sars, 1900) Genus: Macrothrix Species: Macrothrix montana.