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 Micronecta ( Micronecta ) tuwanoni Nieser, Chen, Leksawasdi, Thanyakam & Duangsupa, 2004 Figs 13B , 14E–G Micronecta tuwanoni Nieser, Chen, Leksawasdi, Thanyakam & Duangsupa, 2004: 31–34 , figs 2, 12–21 ( type locality: Chiang Rai , Thailand ). Diagnosis Body length 1.8–2.0. Pronotum longer than median head length. Dorsum generally pale brown. Hemelytron punctate, with transverse irregular-shaped dark marks ( Fig. 13B ). Males: fore femur with two spines on proximal third, two spines on distal third, and one pair of spines distally; tibia with one spine in proximal third and a pair of spines distally; palar claw moderately widened distally, apex rounded. Median lobe of sternite VII with pointed apex and four long setae. Free lobe sub-rectangular, mesial angle rounded, lateral angle nearly square with ca 35 long setae, posterior margin slightly concave ( Fig. 14E ). Left paramere: shaft broad, flat, with a triangular projection in the middle of lateral margin, distal part parallel sided, apex rounded; basal lobe longer than wide, subtrapezoid ( Fig. 14G ). Right paramere: shaft slender and parallel sided, curved near base and abruptly bent at distal fourth, apex narrowly rounded ( Fig. 14F ). Material examined VIETNAM – Phu Tho Prov. • 1 ♂ ; Xuan Son N.P. , Xoan stream, near Lang Village ; 21°5.453′ N , 104°56.122′ E ; 21 May 2015 ; T.S. Nguyen leg.; TS1501 ; ZVNU • 4 ♂♂ , 3 ♀♀ ; Xuan Son N.P. , Xoan stream, near Lang Village ; 21°5.453′ N , 104°56.122′ E ; 5 May 2016 ; T.S. Nguyen leg.; TS1601 ; ZVNU • 5 ♂♂ , 3 ♀♀ ; Xuan Son N.P. , Coi stream, site 2, near concrete bridge ; 21°09.130′ N , 104°56.761′ E ; 27 Aug. 2015 ; T.S. Nguyen leg.; TS8518 ; ZVNU . Distribution Thailand ( Nieser et al. 2004 ). First record for Vietnam . Remarks Nieser et al. (2004) considered this species related to M. anatolica . The right paramere of M. tuwanoni appears similar to that of M. anatolica , both being strongly bent apically. However, the basal part of the right paramere’s shaft is curved in M. tuwanoni while it is straight in the latter species. Based on the presence of a triangular projection on the lateral margin of the left paramere and the similar shape of the median lobe of sternite VII, we consider that this species, more closely related to M. ornitheia , M. pocsi , and M. clavata sp. nov. See Remarks under M. clavata sp. nov. for further details.