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 ( Dichaetonecta ) johorensis Fernando, 1964 Fig. 3G–I Micronecta johorensis Fernando, 1964: 17–18 , figs 1–9 ( type locality: Johor , Peninsular Malaysia ). Micronecta johorensis – Nieser 2000: 287 (key); 2002b: 265, 267–268 (diagnosis, key). Diagnosis Body small, ovate, length 1.5–1.8 (brachypterous). Pronotum shorter than median head length. Dorsum colour pale yellowish. Pronotum with a pair of transverse brown marks. Dark patterns on hemelytra reticulate; embolium with five dark patches; membrane reduced. Males: fore femur with a pair of spines in proximal third ventrally, a large and two small spines in distal third, and a pair of spines distally; fore tibia with one spine on middle third, and a pair of spines on distal margin; palar claw narrow, parallel sided, apically bent ( Fig. 3G ). Median lobe of sternite VII with two long setae and a serrated triangular apex. Free lobe: mesial angle broadly rounded, lateral angle produced, posterior margin straight, two long setae restricted to lateral angle. Left paramere: shaft relatively short and flattened, on mesial side near the middle with a large triangular tooth, apex of shaft narrowly rounded; basal part with a prominent projection on opposite side of large subovate basal lobe ( Fig. 3I ). Right paramere: shaft stout, longitudinally striated, apex rounded ( Fig. 3H ). Material examined VIETNAM – Phu Tho Prov. • 1 ♂ (brachypterous); Xuan Son N.P. , Coi stream , site 1, by the road to Tan Son ; 21°09.204′ N , 104°56.927′ E ; 8 May 2016 ; T.S. Nguyen leg.; TS1617 ; ZVNU . Distribution First record for Vietnam . Other countries: Malaysia , Singapore ( Nieser 2002a ). Remarks Nieser (2002a) already noted the similarities and differences between three closely related species M. johorensis , M. dentifera Nieser, 2002 , and M. eucosmeta Hutchinson, 1940 . These three species can be placed in the subgenus Dichaetonecta as they possess a rather narrow palar claw, and the median lobe of sternite VII bears two long setae. The longitudinally striated shaft of the right paramere is a unique diagnostic characteristic for M. johorensis . Also see Remarks under M. sahlbergi .