Micronecta (Micronecta) undulata, Tran, 2021

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 : 54-56

Micronecta (Micronecta) undulata sp. nov.

urn:lsid:zoobank.org:act:98F8AC39-93D8-4C61-900B-B3BD1F21B676

Figs 13F , 17

Diagnosis

Body length 1.9–2.2. Pronotum longer than median head length. Hemelytron with a broad, transverse, dark brown mark on greyish background ( Fig. 13F ).

Males: fore femur with two spines on middle third, one or two spines distally, and no long seta dorsodistally; fore tibia with one small spine on proximal third dorsally, and three spines on distal third; palar claw distally moderately widened, apex rounded ( Fig. 17A ). Median lobe of sternite VII with narrow, pointed apex and four long setae ( Fig. 17C ). Free lobe short, distally widened and wavy, both angles nearly square, without long setae; posterior margin strongly sinuate ( Fig. 17D ). Left paramere: shaft relatively short and broad, apex truncate, with two ridges running to lateral margin, thus forming two triangular projections on lateral margin; basal lobe longer than wide, sub-rectangular ( Fig. 17F ). Right paramere: shaft parallel sided, slightly curved at proximal part, abruptly constricted at distal third, apical part wavy and lobate; pars stridens processus with 18–27 ridges ( Fig. 17E ).

Etymology

The species epithet refers to the wavy, undulating free lobe.

Material examined

Holotype

VIETNAM • ♂; Phu Tho Prov., 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.

Paratypes

VIETNAM – Phu Tho Prov. • 10 ♂♂, 9 ♀♀; same locality data as for holotype; ZVNU • 4 ♂♂, 3 ♀♀; same locality data as for holotype; NHMW • 2 ♂♂, 1 ♀; Xuan Son N.P. , Ban Coi, Coi stream, site 2, near bridge; 7 Jun. 2013; A.D. Tran et al. leg.; TAD1338 ; ZVNU • 4 ♂♂, 2 ♀♀; Xuan Son N.P. , Ban Coi, Coi stream, site 3, by the road to Tan Son; 7 Jun. 2013; A.D. Tran et al. leg.; TAD1339 ; ZVNU • 1 ♂, 1 ♀; Xuan Son N.P. , Kim Thuong, Xoan stream; 28 Aug. 2013; A.D. Tran et al. leg.; TAD1343 ; ZVNU • 3 ♂♂, 4 ♀♀; Xuan Son N.P. , Ban Coi, Coi stream, site 3, by the road to Tan Son; 29 Aug. 2013; A.D. Tran et al. leg.; TAD1351 ; ZRC • 11 ♂♂, 11 ♀♀; 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 • 2 ♀♀; Xuan Son N.P. , Xoan stream, near its confluence with Ha Bang stream; 21°5.303′ N, 104°57.559′ E; 6 May 2016; T.S. Nguyen leg.; TS1607 ; ZVNU • 4 ♂♂, 6 ♀♀; Xuan Son N.P. , Xoan stream , Xoan village area; 21°05.270′ N, 104°57.591′ E; 23 May 2015; T.S. Nguyen leg.; TS1509 ; ZVNU • 1 ♀; Xuan Son N.P. , Xoan stream, Xoan village area; 21°05.270′ N, 104°57.591′ E; 7 May 2016; T.S. Nguyen leg.; TS1609 ; ZVNU • 1 ♀; Xuan Son N.P ., Than stream, site 2; 21°11.257′ N, 104°52.382′ E; 24 May 2015; T.S. Nguyen leg.; TS1515 ; ZVNU • 1 ♂, 1 ♀; Xuan Son N.P. , Than stream, site 3; 21°11.393′ N, 104°52.625′ E; 28 Aug. 2014; T.S. Nguyen leg.; TS1416 ; ZVNU • 8 ♂♂, 13 ♀♀; Xuan Son N.P. , Than stream, site 3; 21°11.393′ N, 104°52.625′ E; 27 Aug. 2015; T.S. Nguyen leg.; TS8516 ; ZVNU • 3 ♂♂, 2 ♀♀; 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. , Ha Bang stream, near its confluence with Xoan stream; 21°5.318′ N, 104°58.87′ E; 6 May 2016; T.S. Nguyen leg.; TS1606ĐT ; ZVNU • 1 ♂, 2 ♀♀; Xuan Son N.P. , Tan Ong stream, 4 km to Chin Tang stream; 21°04.288′ N, 104°57.271′ E; 26 Aug. 2014; T.S. Nguyen leg.; TS1405 ; ZVNU • 3 ♂♂, 1 ♀; Xuan Son N.P. , Tan Ong stream, 4 km to Chin Tang stream; 21°04.288′ N, 104°57.271′ E; 22 May 2015; T.S. Nguyen leg.; TS1505 ; ZVNU • 1 ♂; Xuan Son N.P. , Coi stream, site 1, by the road to Tan Son; 21°09.204′ N, 104°56.927′ E; 8 May 2016; T.S. Nguyen leg.; TS1617 ; ZVNU • 8 ♂♂, 2 ♀♀; Xuan Son N.P. , Coi stream, site 2, near concrete bridge; 21°09.130′ N, 104°56.761′ E; 24 May 2015; T.S. Nguyen leg.; TS1518 ; ZVNU .

Description

COLOUR ( Fig. 13F ). Dorsum generally brownish grey. Frons and vertex pale yellowish, eyes blackish brown. Pronotum greyish brown. Hemelytron with greyish background. Clavus with brown punctures near anterior margin. Corium with a broad transverse dark brown mark in the middle. Membrane generally dark brown, more hyaline apically. Venter of thorax and abdomen greyish brown and legs pale yellow or nearly whitish.

Structural characteristics

MACROPTEROUS MALES. Body length 1.94–2.19 (holotype: 2.03), width 0.94–1.06 (holotype: 1.00). Head width 0.81–0.83 (holotype: 0.76). Pronotum about 2.4 times as wide as long (0.87: 0.36). Pronotum slightly wider than head. Synthlipsis about 1.3 times as wide as posterior width of an eye (0.37: 0.29). Lengths of leg segments: fore leg: femur 0.32, tibia 0.14, pala 0.14; middle leg: femur 0.67, tibia 0.25, tarsus 0.34, claw 0.21; hind leg: femur 0.56, tibia 0.40, tarsus I 0.39, tarsus II 0.16, claw 0.16. Prestrigilar flap on segment V crescent-shaped ( Fig. 17B ). Strigil present. Median lobe of sternite VII, free lobe, and parameres as in diagnosis.

MACROPTEROUS FEMALES. Body length 1.94–2.03, width 1.0–1.03. Head width 0.81–0.82. Pronotum about 2.6 times as wide as long (0.88:0.34). Pronotum slightly wider than head. Synthlipsis about 1.4 times as wide as posterior width of an eye (0.39: 0.27). Lengths of leg segments: fore leg: femur 0.29, tibiotarsus 0.27; middle leg: femur 0.72, tibia 0.29, tarsus 0.36, claw 0.22; hind leg: femur 0.52, tibia 0.36, tarsus I 0.42, tarsus II 0.16, claw 0.16.

Distribution

Vietnam: Phu Tho.

Remarks

See Remarks under M. pingae sp. nov.

Figures

Fig. 13. Habitus photos of species of Micronecta Kirkaldy, 1897, ♂♂. A. M. ornitheia Nieser, Chen & Yang, 2005 (ZVNU). B. M. tuwanoni Nieser, Chen, Leksawasdi, Thanyakam & Duangsupa, 2004 (ZVNU). C–D. M. clavata sp. nov., two colour forms (ZVNU), C = holotype. E. M. sinuata sp. nov., holotype (ZVNU). F. M. undulata sp. nov., holotype (ZVNU). G–H. M. nieseri sp. nov., two colour forms (ZVNU), G = holotype. I–J. M. pingae sp. nov., two colour forms (ZVNU), I = holotype. K. M. haliploides Horváth, 1904 (ZVNU). All to the same scale.

Fig. 17. Morphological features of Micronecta undulata sp. nov., ♂, paratype (ZVNU). A. Fore leg. B. Prestrigilar flap. C. Median lobe of sternite VII. D. Free lobe. E. Right paramere. F. Left paramere.