Micronecta (Dichaetonecta) decorata Lundblad, 1933

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 : 18

Micronecta (Dichaetonecta) decorata Lundblad, 1933

Figs 1E , 3A–C

Micronecta decorata Lundblad, 1933b: 93–94 , fig. 29, pl. XIX fig. 3 (type locality: Sumatra, Indonesia).

Micronecta decorata – Wróblewski 1968: 775 (checklist). — Fernando & Cheng 1974: 39. — Nieser 2000: 287 (key); 2002b: 266, fig. 13 (diagnosis, distribution). — Chen et al. 2015: 35–37 , figs 14, 24, 30–31, 43, 51, 58, 66, 74–75, 90 (redescription).

Diagnosis

Body length 1.2–2.4. Pronotum distinctly longer than median head length. Hemelytron ( Fig. 1E ) generally yellowish brown, with four indistinct, broken longitudinal brownish stripes; embolium yellowish with three brown spots.

Males: fore femur with a pair of spines in proximal third, one spine on distal third dorsally; fore tibia with a pair of spines on distal margin; palar claw knife-shaped. Median lobe of sternite VII with a pointed apex and one long seta (see Chen et al. 2015: fig. 58). Free lobe large, apically broadened, posterior margin produced into an obtuse angle, lateral angle with 10–15 long setae ( Fig. 3A ). Left paramere: shaft slender, constricted pre-apically, apex slightly twisted ( Fig. 3C ). Right paramere: shaft evenly curved, from distal fourth tapering towards narrowly rounded apex ( Fig. 3B ).

Material examined

VIETNAM – Lao Cai Prov. • 1 ♂; Sa Pa, Sin Chai, Muong Hoa stream (Cat stream); 27 Oct. 2013; A.D. Tran. et al. leg.; TAD1365 ; ZVNU • 1 ♂, 1 ♀; Sa Pa, Cat Cat, Muong Hoa stream (Cat stream); 27 Oct. 2013; Q.H. Ngo et al. leg.; TAD1367 ; ZVNU . – Hanoi • 1 ♂, 1 ♀; Ba Vi N.P., Ba Trai, Ri stream; 67 m a.s.l.; 27 Apr. 2012; Q.H. Ngo leg.; TAD1209 ; ZVNU . – Lam Dong Prov. • 2 ♂♂, 2 ♀♀; Da Lat, Datanla waterfall ; 22 May 2003; A.D. Tran leg.; TAD0333a ; ZRC . – Kien Giang Prov. • 2 ♂♂, 2 ♀♀; Phu Quoc Island , downstream of Da Ban stream; 1 Dec. 2010; A.D. Tran leg.; TAD1026 ; ZVNU .

Distribution

First records for Vietnam. Other countries: mainly in Southeast Asia, from Thailand and Peninsular Malaysia to Indonesia (Sumatra, Java) and Borneo (Sabah) ( Lundblad 1933b; Chen et al. 2015).

Remarks

See Remarks under M. sahlbergi .

Figures

Fig. 1. Habitus photos of species of MicronectaKirkaldy, 1897. A. M. scutellaris (Stål,1858), ♂ (ZVNU). B. M. sedula Horváth, 1905, ♂ (ZVNU). C. M. siva (Kirkaldy, 1897), ♀ (ZVNU). D. M. jaczewskii Wróblewski, 1962, ♂ (ZVNU). E. M. decorata Lundblad, 1933, ♂ (ZRC). F. M. desertana Distant, 1920, ♂ (ZVNU). G. M. ludibunda Breddin, 1905, ♂ (ZVNU). All to the same scale.

Fig. 3. Morphological features of species of Micronecta Kirkaldy, 1897, ♂♂. A–C. M. decorata Lundblad, 1933 (ZVNU). D–F. M. desertana Distant, 1920 (ZVNU). G–I. M. johorensis Fernando, 1964 (ZVNU). A, D = free lobe; B, E, H = right paramere; C, F, I = left paramere; G = fore leg.