Micronecta (Micronecta) tuwanoni Nieser, Chen, Leksawasdi, Thanyakam & Duangsupa, 2004

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 : 48-49

Micronecta (Micronecta) tuwanoni Nieser, Chen, Leksawasdi, Thanyakam & Duangsupa, 2004

Figs 13B , 14E–G

Micronecta tuwanoni Nieser, Chen, Leksawasdi, Thanyakam & Duangsupa, 2004: 31–34 , figs 2, 12–21 (type locality: Chiang Rai, Thailand).

Diagnosis

Body length 1.8–2.0. Pronotum longer than median head length. Dorsum generally pale brown. Hemelytron punctate, with transverse irregular-shaped dark marks ( Fig. 13B ).

Males: fore femur with two spines on proximal third, two spines on distal third, and one pair of spines distally; tibia with one spine in proximal third and a pair of spines distally; palar claw moderately widened distally, apex rounded. Median lobe of sternite VII with pointed apex and four long setae. Free lobe sub-rectangular, mesial angle rounded, lateral angle nearly square with ca 35 long setae, posterior margin slightly concave ( Fig. 14E ). Left paramere: shaft broad, flat, with a triangular projection in the middle of lateral margin, distal part parallel sided, apex rounded; basal lobe longer than wide, subtrapezoid ( Fig. 14G ). Right paramere: shaft slender and parallel sided, curved near base and abruptly bent at distal fourth, apex narrowly rounded ( Fig. 14F ).

Material examined

VIETNAM – Phu Tho Prov. • 1 ♂; Xuan Son N.P. , Xoan stream, near Lang Village; 21°5.453′ N, 104°56.122′ E; 21 May 2015; T.S. Nguyen leg.; TS1501 ; ZVNU • 4 ♂♂, 3 ♀♀; Xuan Son N.P. , Xoan stream, near Lang Village; 21°5.453′ N, 104°56.122′ E; 5 May 2016; T.S. Nguyen leg.; TS1601 ; ZVNU • 5 ♂♂, 3 ♀♀; Xuan Son N.P. , Coi stream, site 2, near concrete bridge ; 21°09.130′ N, 104°56.761′ E; 27 Aug. 2015; T.S. Nguyen leg.; TS8518 ; ZVNU .

Distribution

Thailand ( Nieser et al. 2004). First record for Vietnam.

Remarks

Nieser et al. (2004) considered this species related to M. anatolica . The right paramere of M. tuwanoni appears similar to that of M. anatolica , both being strongly bent apically. However, the basal part of the right paramere’s shaft is curved in M. tuwanoni while it is straight in the latter species. Based on the presence of a triangular projection on the lateral margin of the left paramere and the similar shape of the median lobe of sternite VII, we consider that this species, more closely related to M. ornitheia , M. pocsi , and M. clavata sp. nov. See Remarks under M. clavata sp. nov. for further details.

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. 14. Morphological features of species of Micronecta Kirkaldy, 1897, ♂♂. A–D. M. ornitheia Nieser, Chen & Yang, 2005 (ZVNU). E–G. M. tuwanoni Nieser, Chen, Leksawasdi, Thanyakam & Duangsupa, 2004 (ZVNU). A = median lobe of sternite VII; B, E = free lobe; C, F = right paramere; D, G = left paramere.