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 Sigmonecta Wróblewski, 1962 Sigmonecta Wróblewski, 1962: 176 ( type species: Micronecta quadristrigata Breddin, 1905 , by monotypy). Diagnosis Males: palar claw moderately widened apically; prestrigilar flap on segment V with mesial corner acute; strigil present; median lobe of sternite VII elongate, tongue-shaped, with a rounded tip, and without long and thick setae (see Tinerella 2013 : fig. 58e); strigil present; free lobe of tergite VIII sigmoid; left paramere with sickle-shaped apex; right paramere slender, distally curved (adapted from Wróblewski 1962 ; Chen et al. 2015 ). Remarks The subgenus Sigmonecta was established by Wróblewski (1962) for Micronecta quadristrigata Breddin, 1905 . Subsequently, two more species have been placed in this subgenus: M. altera Wróblewski, 1972 and M. kymatista Nieser & Chen, 1999 (see Chen et al. 2015 ).