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 ( Ctenonecta ) jaczewskii Wróblewski, 1962 Figs 1D , 2H–K Micronecta jaczewskii Wróblewski, 1962: 178–180 , figs 1–8 ( type locality: Hanoi , Vietnam ). Micronecta jaczewskii – Wróblewski 1967: 239 , figs 9–10 (descriptive notes); 1968: 775 (checklist). — Nieser 2000: 285 , figs 29–30 (record Thailand , key). — Nieser et al. 2005: 190–191 (record China ). Diagnosis Body length 2.1–2.5. Pronotum distinctly longer than median head length. Hemelytron ( Fig. 1D ) with indistinct longitudinal markings. Males: fore femur with row of seven spines on proximal third ventrally; fore tibia without spine ( Fig. 2H ); palar claw, median lobe of sternite VII and free lobe ( Fig. 2I ) as in diagnosis of Ctenonecta . Left paramere: shaft stout, apex blunt ( Fig. 2K ). Right paramere: shaft broad at base, constricted at distal half, then expanded and constricted again before narrowly rounded apex; basal lobe with a distinct hump on mesial side, near base of shaft ( Fig. 2J ). Material examined VIETNAM – Cao Bang Prov. • 3 ♂♂ , 3 ♀♀ ; Trung Khanh , Duc Hong Commune , stream; 19 Dec. 2013 ; A.D. Tran et al. leg.; TAD1376 ; ZVNU . – Phu Tho Prov. • 1 ♂ ; Xuan Son N.P. , Xoan stream, near its confluence with Ha Bang stream ; 21°5.303′ N , 104°57.559′ E ; 27 Aug. 2014 ; T.S. Nguyen leg.; TS1407 ; ZVNU . – Hanoi • 2 ♂♂ , 1 ♀ ; Nhue River , in Lien Mac area ; 25 Mar. 2010 ; T.M. Pham leg.; HN08 ; ZVNU . – Quang Nam Prov. • 2 ♂♂ , 1 ♀ ; Duy Xuyen District , Duy Phu Village , My Son hamlet , My Son Sanctuary ; 15°46.228′ N , 108°07.155′ E ; Apr. 2017 ; T.D. Chu leg.; MS1723 ; ZVNU . Distribution Vietnam : Lao Cai , Hanoi , Ha Tinh ( Wróblewski 1962 , 1967 ); first records for Cao Bang , Phu Tho , Quang Nam . Other countries: Thailand , China ( Nieser 2000 ; Nieser et al. 2005 ). Fig. 2. Morphological features of species of Micronecta Kirkaldy, 1897 , ♂♂. A–D . M . scutellaris ( Stål, 1858 ) (ZVNU) . E–G . M . sedula Horváth, 1905 (ZVNU). H–K . M. jaczewskii Wróblewski, 1962 (ZVNU). A, H = fore leg; B, E, I = free lobe; C, F, J = right paramere; D, G, K = left paramere. Remarks The male of this species can easily be separated from other species of Micronecta by its distinct shape of the right paramere ( Fig. 2J ), together with its unique palar claw ( Fig. 2H ) and the presence of combs of setae on the middle tibia.