Micronecta (Indonectella) grisea ( Fieber, 1844 )

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 : 24-25

Micronecta (Indonectella) grisea ( Fieber, 1844)

Figs 5A , 6A–D

Sigara grisea Fieber, 1844: 14 , table 1, fig. 21 (type locality not specified).

Micronecta thyesta Distant, 1910: 349–350 (type locality: Madhupur, India).

Micronecta pilosella Matsumura, 1915: 115 , 119 (type locality: Taiwan).

Micronecta grisea – Kirkaldy 1908: 209 (list). — Wróblewski 1968: 772–773, 775 (synonymy, checklist); 1972a: 23–25, 50, tables 1–2, figs 36, 40 (additional notes, key). — Fernando & Cheng 1974: 37. — Jansson 1995: 30–31 (catalogue). — Nieser & Chen 1999: 79–80, table 2, fig. 44 (key, notes, distribution). — Nieser 2000: 286, fig. 31 (key); 2002b: 265, 267, fig. 10 (key, notes). — Nieser et al. 2005: 190 (checklist).

Micronecta pilosella – Chen 1960: 117 (synonymised with M. thyesta ).

Micronecta thyesta – Hutchinson 1940: 363–365, figs 64–75 (redescription, assigned to subgenus Indonectella ). — Wróblewski 1962: 177 (notes); 1967: 240 (notes); 1968: 772 (synonymised with M. grisea ). — Fernando 1964: 606, fig. 11, 22, 33 (diagnosis). — Leong 1966: 84, 88 (notes, key).

Diagnosis

Body length 3.0–3.1. Pronotum slightly longer than median head length; clearly narrower than head width. Hemelytron ( Fig. 5A ) translucent or greyish brown, usually with two broken longitudinal dark stripes; embolium with a large spot in the middle and two smaller spots on two sides.

Males: fore femur with a pair of spines on proximal third; fore tibia with a spine on middle third ( Fig. 6A ); palar claw, median lobe of sternite VII and free lobe ( Fig. 6B ) as in diagnosis for subgenus. Left paramere: shaft slender, evenly arched; distal part with small barbs; apex recurved, flattened, thus appearing flag-like; basal lobe short and broad ( Fig. 6D ). Right paramere: shaft distally curved, tapering from distal half towards narrowly rounded apex ( Fig. 6C ).

Material examined

VIETNAM – Ninh Thuan Prov. • 3 ♂♂; Nui Chua N.P ., Da Vach Lake ; 27 Jun. 2004; N.V. Quang leg.; NC-01; ZRC .

Distribution

Vienam: Hanoi, Lao Cai, Ninh Binh (Cuc Phuong), Nghe An, Ha Tinh ( Wróblewski 1962, 1967); first record for Ninh Thuan. Other countries: widespread from India, Sri Lanka to southern China, Taiwan, Peninsular Malaysia, and Indonesia (Sumatra, Java) ( Leong 1966; Fernando & Cheng 1974; Nieser & Chen 1999; Nieser et al. 2005).

Remarks

This species can easily be recognised by the relatively large body (length ca 3.0 mm), the absence of a strigil, the shape of the the free lobe, and the shape of the apical part of the left paramere ( Fig. 6B, D ).

Figures

Fig. 5. Habitus photos of species of Micronecta Kirkaldy, 1897, ♂♂. A. M. grisea (Fieber, 1844) (ZRC). B. M. guttatostriata Lundblad, 1933 (ZVNU). C. M. drepani Nieser, 2000 (ZVNU). D. M. erythra Nieser, Chen & Yang, 2005, right hemelytron (ZVNU). E. M. cultellata sp. nov., holotype (ZVNU). F. M. anatolica Lindberg, 1922 (ZVNU). G. M. arcuata sp. nov., holotype (ZVNU). H. M. fulvopicta sp. nov., holotype (ZVNU). I. M. acuminata sp. nov., holotype (ZVNU), right hemelytron and genitalia dissected. J–L. M. vietnamica sp. nov., J = holotype (ZVNU). All to the same scale.

Fig. 6. Morphological features of species of Micronecta Kirkaldy, 1897, ♂♂. A–D. M. grisea (Fieber, 1844) (ZVNU). E–H. M. guttatostriata Lundblad, 1933 (ZVNU). A, E = fore leg; B, F = free lobe; C, G = right paramere; D, H = left paramere.