Micronecta (Lundbladella) guttatostriata Lundblad, 1933

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 : 25

Micronecta (Lundbladella) guttatostriata Lundblad, 1933

Figs 5B , 6E–H

Micronecta guttatostriata Lundblad, 1933b: 101–102 , pl. I (type locality: Java, Indonesia).

Micronecta guttatostriata – Wróblewski 1967: 240, 242–243, figs 11–16 (redescription, assigned to subgenus Lundbladella ); 1968: 775 (checklist). — Nieser 2000: 287, fig. 39 (key); 2002b: 266, fig. 7 (notes, key). — Polhemus 2017: 127 (record Cambodia).

Diagnosis

Body length 2.0–2.4. Dorsum generally dark brown. Pronotum slightly longer than median head length, with two transverse yellow stripes on anterior part. Hemelytron ( Fig. 5B ) with yellowish brown background and longitudinal yellowish stripes usually fragmented into small dots; embolium with three translucent patches.

Males: fore femur with a pair of spines on proximal third ventrally; fore tibia without spine ( Fig. 6E ); palar claw, median lobe of sternite VII and free lobe ( Fig. 6F ) as in diagnosis for subgenus. Left paramere: shaft slender, basally straight and curved at distal fourth; basal lobe broad, trapezoid ( Fig. 6H ). Right paramere: shaft broadly curved, distal half strongly broadened ( Fig. 6G ).

Material examined

VIETNAM – Cao Bang Prov. • 1 ♂; Bao Lam, near Bao Lam district town, Ban Chim stream, tributary of Gam River ; 20 Dec. 2013; A.D. Tran et al. leg.; TAD1382 ; ZVNU . – Phu Tho Prov. • 1 ♂; Xuan Son N.P. , Ha Bang stream, near its confluence with Xoan stream; 21°5.318′ N, 104°58.87′ E; 26 Aug. 2014; T.S Nguyen. leg.; TS1406 ; ZVNU • 1 ♀; Xuan Son N.P. , Coi stream, site 1, by the road to Tan Son; 21°09.204′ N, 104°56.927′ E; 27 Aug. 2015; T.S. Nguyen leg.; TS8517 ; ZVNU • 2 ♀♀; Xuan Son N.P ., Ha Bang stream , Ha Bang village area; 21°04.343′ N, 104°59.182′ E; 7 May 2016; T.S. Nguyen leg.; TS1610 ; ZVNU . – Hanoi • 1 ♂; Ba Vi N.P. , Minh Quang, Cai stream; 65 m a.s.l.; 26 Apr. 2012; Q.H. Ngo et al. leg.; TAD1207 ; ZVNU • 1 ♀; Ba Vi N.P. , Khoang Xanh, Tien stream; 95 m a.s.l.; 27 Apr. 2012; Q.H. Ngo and A.D. Tran leg.; TAD1208 ; ZVNU . – Thanh Hoa Prov. • 1 ♂; Ben En N.P., Nhu Xuan, Khe May stream; Dec. 2012; T.D. Pham leg.; BE1206 ; ZVNU • 1 ♀; Pu Luong Nature Reserve, Quan Hoa, Phu Nghiem , Dong Tam , Luong stream; 15 Mar. 2013; T.D. Pham leg.; PL 1301 ; ZVNU . – Nghe An Prov. • 1 ♂, 1 ♀; Con Cuong, near Tung Huong, Khe Num stream; 21 Dec. 2012; Q.H. Ngo leg.; NQH1211 ; ZVNU • 6 ♂♂, 8 ♀♀; Pu Mat N.P., Chat stream, tributary of Choang stream ; 1 Sep. 2020; A.D. Tran et al. leg.; TAD20-14 ; ZVNU . – Dong Nai Prov. • 1 ♀; Cat Tien N.P. , Ben Cu stream; 5 Nov. 2009; A.D. Tran leg.; TAD0928 ; ZVNU • 1 ♀; Vinh Cuu, Ma Da stream, near Rang Rang Forest ranger station, ca 400 m downstream from bridge; 13 Apr. 2010; T.D. Pham leg.; PTD1007 ; ZVNU .

Distribution

Vietnam: Ninh Binh (Cuc Phuong) ( Wróblewski 1967); first records for Cao Bang, Phu Tho, Hanoi, Thanh Hoa, Nghe An, Dong Nai. Other countries: southwestern China, Thailand, Indonesia, Peninsular Malaysia, Cambodia ( Lundblad 1933b; Nieser 2000, 2002b; Nieser et al. 2005; Polhemus 2017).

Remarks

In Vietnam, M. guttatostriata is one of two species without a strigil; the other one is M. grisea . Micronecta guttatostriata can be separated from the latter by its distinctly smaller size, with body length of around 2.0– 2.4 mm, and the unique colour pattern of the pronotum. In addition, the shape of the free lobe and the parameres are reliable characteristics for identifying this species.

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.