Micronecta (Ctenonecta) jaczewskii Wróblewski, 1962

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 : 16-18

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).

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.

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. 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.