Micronecta (Unguinecta) melanochroa Nieser, Chen & Yang, 2005

Ha, Tuyet Ngan & Tran, Anh Duc, 2021, Taxonomy of Micronectidae (Heteroptera: Nepomorpha) from Vietnam, with descriptions of 11 new species, European Journal of Taxonomy 756, pp. 1-82 : 68

Micronecta (Unguinecta) melanochroa Nieser, Chen & Yang, 2005

Figs 21D , 23A–D

Micronecta melanochroa Nieser, Chen & Yang, 2005: 202–203 , figs 42–50 (type locality: Yunnan, China; assigned to subgenus Unguinecta ).

Diagnosis

Body length 2.3–2.4. Pronotum longer than median head length. Dorsum generally dark brown. Hemelytron greyish brown without darker brown patches; embolium yellowish or light brown, with a thin dark stripe near mesial margin ( Fig. 21D ).

Males: pala with a secondary claw; primary palar claw sub-triangular, strongly widened distally ( Fig. 23A ). Median lobe of sternite VII narrow and long, with a narrowly rounded apex. Free lobe with mesial angle rounded, posterior margin nearly straight, lateral angle well-produced, ca 20 long setae on lateral side of free lobe ( Fig. 23B ). Left paramere: shaft styliform, tapering towards narrowly rounded apex, apical part slightly twisted; basal lobe relatively short and broadly rounded ( Fig. 23D ). Right paramere: shaft with mesial side nearly straight proximally, lateral side evenly curved, slightly thickened in the middle, then tapering towards blunt apex ( Fig. 23C ).

Material examined

VIETNAM – Phu Tho Prov. • 1 ♂; Xuan Son N.P., Ban Coi, Coi stream, site 1, water from underground; 7 Jun. 2013; A.D. Tran et al. leg.; TAD1337 ; ZVNU • 1 ♂; Xuan Son N.P. , Kim Thuong, Xoan stream; 28 Aug. 2013; A.D. Tran et al. leg.; TAD1343 ; ZVNU • 14 ♂♂, 19 ♀♀; Xuan Son N.P. , Dong Son, Than stream, site 1; 29 Aug. 2013; A.D. Tran et al. leg.; TAD1346 ; ZVNU • 6 ♂♂, 3 ♀♀; Xoan stream, near its confluence with Ha Bang stream; 21°05.303′ N, 104°57.559′ E; 27 Aug. 2014; T.S. Nguyen leg.; TS1407 ; ZVNU • 1 ♂, 1 ♀; Lap stream, the first concrete bridge from Ngoc waterfall; 21°08.398′ N, 104°56.303′ E; 28 Aug. 2014; T.S. Nguyen leg.; TS1412 ; ZVNU • 2 ♂♂; Lap stream, the second concrete bridge from Ngoc waterfall; 21°08.322′ N, 104°56.256′ E; 28 Aug. 2014; T.S. Nguyen leg.; TS1413 ; ZVNU . – Nghe An Prov. • 12 ♂♂, 5 ♀♀; Con Cuong, Lien Huong Village, Khe Thoi stream; 21 Dec. 2012; Q.H. Ngo leg.; NQH1209 ; ZVNU .

Distribution

First record for Vietnam. Other country: China (Yunnan).

Remarks

See Remarks under M. polhemusi .

Figures

Fig. 21. Habitus photos of species of Micronecta Kirkaldy, 1897 and Synaptonecta Lundblad, 1933, ♂♂. A. M. quadristrigata Breddin, 1905 (ZVNU). B. M. altera Wróblewski, 1972 (ZVNU). C. M. polhemusi Nieser, 2000 (ZRC). D. M. melanochroa Nieser, Chen & Yang, 2005 (ZVNU). E. M. caperata sp. nov., holotype (ZVNU). F. M. fugitans Breddin, 1905 (ZVNU). G. M. tarsalis Chen, 1960 (ZVNU). H. S. issa (Distant, 1910) (ZVNU). All to the same scale.

Fig. 23. Morphological features of species of Micronecta Kirkaldy, 1897, ♂♂. A–D. M. melanochroa Nieser, Chen & Yang, 2005 (ZVNU). E–G. M. polhemusi Nieser, 2000 (ZVNU). A = fore leg; B, E = free lobe; C, F = right paramere; D, G = left paramere.