Synaptonecta issa ( Distant, 1910 )

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 : 76-77

Synaptonecta issa ( Distant, 1910)

Figs 21H , 26

Micronecta issa Distant, 1910: 350 (type locality: Calcutta (Kolkata), India).

Synaptonecta breddini Lundblad, 1933b: 109–111 , fig. 36 (type locality: Java, Indonesia).

Micronecta issa – Hutchinson 1933: 398. — Lundblad 1933b: 100–101 (descriptive notes). — Leong 1966: 84, 88 (synonymy, notes, key).

Synaptonecta breddini – Hutchinson 1940: 398–399, figs 107–112 (symnonymised with Synaptonecta issa ).

Micronecta (Synaptonecta) issa – Wróblewski 1967: 243–244 (descriptive notes).

Synaptonecta issa (Distant) – Wróblewski 1972b: 7–9, 48, figs 27, 31 (redescription). — Nieser & Chen 1999: 78 (key, distribution). — Nieser 2002b: 265–266 (key, diagnosis). — Polhemus 2017: 127 (record Cambodia).

Diagnosis

Body length: brachypterous form 1.8–2.0, macropterous form 1.9–2.4. Brachypterous form with ovate body outline. Pronotum very short. Hemelytron covered with minute scales and dark spots; no suture between corium and clavus; embolium with seven dark patches distributed ( Fig. 21H ).

Males: Palar claw very narrowed, apex pointed ( Fig. 26A ). Strigil present. Free lobe very narrow. Median lobe of sternite VII narrow, sub-triangular, with six long setae ( Fig. 26B ). Left paramere: shaft constricted in the middle then widened apically ( Fig. 26D ). Right paramere broad, with small barbs on mesial side and apical part ( Fig. 26C ).

Other characteristics as in Remarks for the genus above.

Material examined

VIETNAM – Dong Nai Prov. • 1 ♂, 1 ♀; Vinh Cuu, Ma Da, Bo Hao lotus lake ; 18 Apr. 2009; A.D. Tran leg.; TAD0911; ZVNU • 1 ♂; Cat Tien N.P. , Dak-Lua stream (near Dak-Lua station ); 9 Apr. 2010; A.D. Tran and T.D. Pham leg.; PTD1001 ; ZVNU • 1 ♂, 1 ♀; Vinh Cuu, Ma Da, Bo Hao lotus pond; 15 Apr. 2010; T.D. Pham leg.; PTD1010 ; ZVNU .

Distribution

Vietnam: Hanoi, Ninh Binh ( Wróblewski 1967), first records for Dong Nai Other countries: widespread from South Asia ( India, Sri Lanka) to Southeast Asia, including Peninsular Malaysia, Singapore, Java ( Nieser 2002b), and Cambodia ( Polhemus 2017).

Remarks

This species can be easily separated from other micronectids in Vietnam and surrounding regions by the characterstics in the Diagnosis above.

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. 26. Morphological features of Synaptonecta issa(Distant, 1910), ♂ (ZVNU). A. Fore leg.B. Median lobe of sternite VII. C. Right paramere. D. Left paramere.