Taxonomy of Micronectidae (Heteroptera: Nepomorpha) from Vietnam, with descriptions of 11 new species Author Ha, Tuyet Ngan 568A022B-D36D-4147-8B0D-FB35B2A4D197 Faculty of Biology, VNU University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam. hatuyetngan95@gmail.com Author Tran, Anh Duc 3CB36F17-D917-4600-B888-C33B1C04259F Faculty of Biology, VNU University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam. tran.anhduc@hus.edu.vn text European Journal of Taxonomy 2021 2021-06-24 756 1 82 http://dx.doi.org/10.5852/ejt.2021.756.1407 journal article 5963 10.5852/ejt.2021.756.1407 73c0dde0-1a03-4fe2-8d13-05cd614ff3b1 2118-9773 5033010 4A60FB62-20D7-4DC9-A4EA-BCE633730111 Subgenus Unguinecta Nieser, Chen & Yang, 2005 Unguinecta Nieser, Chen & Yang, 2005: 200–202 ( type species: Micronecta polhemusi Nieser, 2000 , by original designation). Diagnosis Males: pala with a secondary narrow claw, primary claw apically widened; prestrigilar flap on segment V with broadly rounded medial apex; strigil present; median lobe of sternite VII with angular or rounded apex, with two long and thick setae; free lobe of tergite VIII with a slightly produced lateral angle; shaft of left paramere long and narrow, tapering apically; right paramere slightly curved over most of its length, with narrowly rounded apex (adapted from Chen et al. 2015 ). Remarks Nieser et al. (2005) established the subgenus Unguinecta , and placed five species in it: M. polhemusi Nieser, 2000 , M. khasiensis Hutchinson, 1940 , M. matsumurai Miyamoto, 1965 , M. melanochroa Nieser, Chen & Yang, 2005 , and M. waltoniana Hutchinson, 1940 . Among these, M. khasiensis and M. waltoniana were transferred from the subgenus Mesonecta .