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 .