Micronecta (Basileonecta) sedula Horváth, 1905

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 : 13-15

Micronecta (Basileonecta) sedula Horváth, 1905

Figs 1B , 2E–G

Micronecta sedula Horváth, 1905: 423 (type locality: Akashi, Japan).

Micronecta quadrivittata Matsumura, 1905: 62 (type locality: Hokkaido and Honshu, Japan).

Micronecta quadriseta Lundblad, 1933a: 460–461 , pl. XIII fig. 7, text fig. 6 (type locality: Soochow (Suzhou), China).

Micronecta sedula – Wróblewski 1960: 309–313, pl. XVI (redescription); 1967: 237 (descriptive notes); 1968: 776 (checklist, synonymy list). — Jansson 1995: 28–29 (catalogue).

Micronecta quadrivittata – Matsumura 1915: 114 (synonymised with Micronecta sedula ).

Micronecta quadriseta – Wróblewski 1960: 309–313 (synonymised with Micronecta sedula ).

Diagnosis

Body length 2.7–3.4. Pronotum distinctly longer than median head length, without dark transverse stripe. Hemelytron ( Fig. 1B ) pale yellowish, corium with four brown stripes.

Males: fore femur with four spines in proximal third ventrally, four spines on middle third and a pair of spines on distal third dorsally; fore tibia with a pair of spines on distal third; palar claw slender, straight. Median lobe of sternite VII with two long setae. Free lobe sub-rectangular, posterior margin concave, lateral angle produced, with about 10 long setae ( Fig. 2E ). Left paramere: shaft stout, apical part slightly swollen, apex obtuse, mesial side with minute spine-like scales; basal lobe tongue-shaped ( Fig. 2G ). Right paramere: shaft slender slightly curved pre-apically, apex narrowly rounded ( Fig. 2F ).

Material examined

VIETNAM – Quang Ninh Prov. • 1 ♂, 1 ♀; Dong Rui ; 12 Sep. 2019; T.A.N. Nguyen leg.; #1902; ZVNU . – Ninh Binh Prov. • 1 ♂, 1 ♀; Gia Vien, Van Long Wetland Nature Reserve ; 25 Aug. 2002; Q.K. Hoang and V.K. Dinh leg.; VNNB0201 ; ZRC. – Thua Thien Hue Prov . • 5 ♂♂, 6 ♀♀; Quang Dien District, Quang Loi Commune, Con Toc ; 7 May 2012; A.D. Tran leg.; TAD1212 ; ZVNU .

Distribution

Vietnam: Hoa Binh ( Chine), Ninh Binh (Cuc Phuong), and Quang Tri ( Wróblewski 1962, 1967); first records from Quang Ninh, Ninh Binh (Van Long), Thua Thien Hue. Specimens from Thua Thien Hue were collected in the brackish water of a coastal lagoon. Other countries: Russia (Khanka Lake), Korea, Japan, eastern China ( Wróblewski 1960, 1968; Nieser et al. 2005).

Remarks

See Remarks under M. siva .

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.