Review of the filter-feeding caddisfly subfamily Macronematinae (Trichoptera: Hydropsychidae) in tropical Southeast Asia Author Uy, Christine Jewel C. Author Malicky, Hans Author Bae, Yeon Jae text Raffles Bulletin of Zoology 2018 2018-11-15 66 664 703 journal article 10.5281/zenodo.5360916 2345-7600 5360916 5AC21789-E1C1-4B48-813D-667D7638893C Trichomacronema tamdao Malicky, 1998 ( Figs. 263–267 ) Trichomacronema tamdao Malicky, 1998b: 779 [ Holotype male; Vietnam ; HMPC]. Diagnosis. Male. Antennae 30 mm in length. Antennal flagellum brown with darker striations. Forewing about 18 mm and hind wing 9 mm in length. Wing pattern as shown ( Fig. 263 ). Mesoscutum and mesoscutellum without evident markings. Tibial spurs 1.4.4. Male genitalia. Inferior appendages two-segmented, harpago longer than T. paniae , as long as almost half of coxopodite length ( Fig. 264 ). In lateral view, phallus with oval and broad apex ( Fig. 266 ) and narrow dorsally ( Fig. 267 ). Segment X bifid and short ( Fig. 265 ). Female. Antennae 33 mm in length. Antennal flagellum brown with darker striations. Forewing 18 mm and hind wing 9 mm in length. Wing pattern same as male. Mesoscutum and mesoscutellum without evident markings. Tibial spurs 1.4.4. Type material examined. Holotype . Vietnam : 1 male , Tam Dao , coll. H. Malicky , 19 May–13 June 1995 (HMPC). Paratypes . Vietnam : 2 males , Tam Dao , coll. H. Malicky , 19 May –13 June 1995 (HMPC) . Additional material examined. Laos : 3 females , Hua Phan Province , Phou Pan , coll. C. Holzschuh , 19–21 June 2014 (HMPC) . Distribution. Thailand , Vietnam , Laos . Remarks. Trichomacronema tamdao and T. paniae can be easily distinguished by their phalli ( Figs. 261, 266 ). Furthermore, the body of T. tamdao is slenderer than that of T. paniae . However, female specimens may be difficult to identify.