Dunhevedia serrata Daday 1898

52. Dunhevedia serrata Daday, 1898 Localities and specimens found: 50 – 1♀; 81 – 1♀, 1♀ em, 3j. Distribution and ecology. Dunhevedia serrata is distributed in the Ethiopian, Oriental and Australasian (New Guinea) regions (Rajapaksa & Fernando 1987b; Smirnov 1996; Smirnov & De Meester 1996; Kotov et al. 2013a). In the Oriental area, it is relatively common (Fernando 1974, 1980; Idris & Fernando 1981; Idris 1983; Michael & Sharma 1988; Sanoamuang 1998; Maiphae et al. 2005, 2008; Tanaka & Ohtaka 2010; Rane 2011; Chatterjee et al. 2013; Korovchinsky 2013; Kotov et al. 2013b; Van Damme et al. 2013; Sinev & Yusoff 2015, 2018; Lopez et al. 2017; Sharma & Sharma 2017; Tiang-nga et al. 2020; Padhye et al. 2023; Choedchim & Maiphae 2023), but there are still few records of this species in Vietnam (Sinev & Korovchinsky 2013; Gusakov et al. 2014; present study). The lifestyle and ecology of this species are poorly studied. They are probably similar to those of the previous congener. Dunhevedia serrata is known mainly from permanent and temporary stagnant water bodies, including those vegetation-rich: lakes, reservoirs, floodplains, rice fields, ponds, swamps, mining pools, ditches (Idris 1983; Sinev & Korovchinsky 2013; Sinev & Yusoff 2015; Choedchim & Maiphae 2023). In our samples, several D. serrata specimens were found in a stagnant section of a forest stream and among the roots of water hyacinth in a floodplain lake (see Appendix 1).