Himalisundacoris yasunagai Kim & Jung 2026, sp. nov.

Himalisundacoris yasunagai Kim & Jung sp. nov. Figs 10, 11, 12 Materials examined. Vietnam • Holotype. 1 ♂, Quang Ngai Prov., Ba To, Ba Ngac (14°45'48.90"N, 108°31'40.41"E), 724 m altitude, 2.v.2025, J. Kim leg. (ZCDTU) (DTUHMM 0104). Paratypes. • 3 ♂♂ 5 ♀♀, same data as for holotype (ZCDTU) (DTUHMM 0105–0112). Diagnosis. Distinguished from its congeners by: body small, with length <3.6 mm; dorsum mostly orange brown; first antennomere mostly brown, except for dark extreme apex and dark small marking ventromedially; pronotum mostly orange-brown; scutellum entirely greenish yellow in male and yellowish brown in female; clavus orange brown with dark indistinct markings; abdomen mostly orange-brown, except for dark band encircling pygophore medially in male (Fig. 10 D); margin of sensory lobe of left paramere angled; shaft of right paramere short, its apex blunt; vesica mostly membranous with two lobal sclerites bearing large, distinct tooth-like processes, and one broad lobal sclerite (Fig. 11); and interramal lobe elongate-oval, narrower than interramal sclerite, leaving interramal sclerites partly exposed, inner margin gently sloping (Fig. 12). Description. Male. Coloration: generally orange-brown with dark markings. Head: partly brown to dark brown; vertex and frons entirely pale brown; clypeus and mandibular plate entirely dark brown; maxillary plate mostly dark brown, except for pale upper area near mandibular plate; buccula mostly pale brown, except for dark anterior part near clypeus and maxillary; antenna mostly dark brown; first antennomere mostly brown, except for dark extreme apex and dark small marking ventromedially; second antennomere mostly dark brown, except for pale subbase; third antennomere mostly dark brown except for pale basal part; fourth antennomere mostly dark brown except for pale extreme base; labium mostly pale brown to brown; basal part of first labial segment dark brown; third segment mostly brown; apical part of fourth segment dark brown. Thorax: pronotum generally orange-brown, somewhat translucent, with underlying brownish area visible, in some specimens with faint greenish hue; callus with pair of dark large spots, sometimes spots divided into smaller spots; propleuron mostly pale brown to orange-brown; mesepisternum and mesepimeron pale brown; metepimeron mostly orange-brown; scent efferent system pale brown, sometimes posterior area grayish brown; scutellum entirely greenish-yellow; exposed part of mesoscutum orange-brown; hemelytron mostly orange-brown with dark markings; clavus orange-brown, anterior, median and apical parts orange-brown, remaining areas with indistinct dark markings; corium mostly orange-brown, with dark markings subposteriorly at outer area and dark oblique marking posteriorly at inner area, dark markings variable among specimens, sometimes connected or separated, but not reaching clavus; cuneus orange-brown with dark large medial marking, dark apex, and dark marking at inner margin, weakly tinged with reddish near margin of dark markings; fore and mid femora with reddish marking subapically; hind femur with reddish markings subbasally, medially, and subapically; all tibiae mostly pale brown with dark ring apically; all tarsi mostly pale brown; third tarsomeres mostly dark brown, except for pale base. Abdomen: mostly orange-brown, except for dark band encircling pygophore medially. Surface and vestiture: body strongly and oily shiny, impunctate, sparsely covered with short pale setae. Structure: body elongate-oval, length 2.90–3.36 mm. Head: almost hypognathous, strongly transverse, 3.77 × as wide as long; vertex 0.88 × as wide as single compound eye width; antenna long and linear, clearly longer than body length; first segment almost cylindrical, slightly thickened, thicker than second segment, 2.06 × as long as vertex width, 0.35 × as long as second segment; second segment almost cylindrical, slightly thickened, thicker than third and fourth segment, subequal to combined third and fourth segments; proportion of antennomeres I – IV 0.56: 1.58: 0.86: 0.80; labium reaching hind coxa. Thorax: pronotum trapezoid, somewhat broad, dorsal longitudinal length 0.55 × as long as posterior maximal width, lateral margin almost straight in dorsal view and weakly impressed subapically in frontal view, posterior margin round; callus weakly swollen; pronotal collar thin, as thin as third or fourth antennomere maximal diameter; scutellum weakly tumid, width longer than length, length subequal to claval commissure length; exposed part of mesoscutum narrow; lateral margin of hemelytron clearly rounded; cuneus somewhat small, cuneal outer margin 0.29 × as long as embolial margin; fore leg with second tarsomere short; mid and hind legs with first tarsomere short, second tarsomere subequal to third tarsomere. Abdomen: tapering, reaching apex of cuneus. Genitalia: left paramere strongly curved, shaft long, shaft apex weakly twisted and curved, sensory lobe strongly developed, more than shaft, its margin angled (Fig. 11 A – D); right paramere rod-shaped and stout, shaft short, its apex blunt (Fig. 11 E, F); vesica mostly membranous with two lobal sclerites bearing large, distinct tooth-like processes, and one broad lobal sclerite (Fig. 11 G – I). Female: Coloration: similar to male, but generally more reddish. Surface and vestiture: same as in male. Structure: same as in male, except for body more oval. Genitalia: parieto-vaginal ring (pvr) elongate oval, weakly curved medially, anterior margin thick, outer margin narrow (Fig. 12 A); posterior wall with simple interramal lobe (irl) and interramal sclerite (irs); irl elongate-oval, narrower than irs, leaving irs partly exposed (Fig. 12 B). Measurements (in mm). Male (n = 4) / female (n = 5) Body length, clypeus – apex of membrane: 2.90–3.36 / 3.36 – 3.51; head length, excluding collar: 0.22–0.25 / 0.25 – 0.33; head width across eyes: 0.85–0.92 / 0.95 – 0.99; vertex width: 0.25–0.29 / 0.32 – 0.33; length of 1 st antennomere: 0.52–0.59 / 0.58 – 0.59; 2 nd: 1.51–1.65 / 1.56 – 1.63; 3 rd: 0.82–0.88 / 0.86 – 0.98; 4 th: 0.76–0.84 / 0.79 – 0.80; mesal pronotal length: 0.70–0.82 / 0.81 – 0.85; pronotal maximal width: 1.31–1.47 / 1.58 – 1.66; scutellar width: 0.64–0.76 / 0.82 – 0.83; mesal scutellar length: 0.60–0.61 / 0.70 – 0.74; claval commissure length: 0.59–0.60 / 0.71 – 0.72; maximal width across hemelytron: 0.80–0.85 / 0.98 – 1.08: length of hind leg (femur: tibia: tarsus): 1.31–1.35: 1.84–1.93: 0.48–0.52 / 1.41 – 1.44: 2.08–2.16: 0.51–0.53. Etymology. Named in honor of Dr Tomohide Yasunaga, a distinguished specialist in Miridae taxonomy, in recognition of his extensive contributions to the study of this family, particularly in the Oriental Region, including his work on the genus Himalisundacoris. The specific name is treated as a noun in the genitive case. Plant association. This species was collected from the inflorescence of an unidentified broad-leaved tree, and both adults and last-instar individuals (Fig. 10 F) were collected at the same time. Although identification of the associated plant was unsuccessful, the species was not found on inflorescences of other surrounding trees at the time of collection and was observed only on the inflorescence of this tree, suggesting that it is more likely associated with a specific host plant rather than aggregating on various inflorescences. Distribution. Vietnam (Central). Remarks. The genus Himalisundacoris currently comprises six described species, and a key to species has been provided by Yasunaga (2024). Himalisundacoris yasunagai sp. nov. can be distinguished from H. takaii Yasunaga, 2024 and H. theoi Yasunaga, 2024 by the scutellum being entirely creamy and greenish yellow (creamy yellow in female) without dark markings. This new species can also be readily distinguished from H. omiae Yasunaga, 2024 by the general coloration of body being orange-brown (vs the body pale milky brown) and by the shaft of right paramere being short (vs the shaft clearly long). From H. palolo Yasunaga, 2024, it can be distinguished by the abdomen mostly pale brown (vs the abdomen entirely dark brown) and by the notches of the lobal sclerites of male vesica being well developed (vs the lobal sclerites with weak notches). Himalisundacoris yasunagai sp. nov. is also similar to H. schwartzi Yasunaga, 2024, but differs in the first antennomere mostly pale brown (vs the apical part of the first segment with a dark mark); the clavus orange-brown with dark markings in female (vs the clavus entirely dark brown in female); and by the inner margin of the interramal lobe of female genitalia being gently sloping (vs inner margin almost vertical). It is also similar to H. duwalae Yasunaga, 2024, but can be distinguished by the pronotum mostly unicolorous (vs the posterior part of the pronotum dark brown); the clavus orange-brown with dark markings (vs the clavus entirely dark brown); and by the interramal lobe of female genitalia being narrow (vs the interramal lobes widened). Among all examined specimens herein, slight variation in dark markings of hemelytron was observed, but no specimens with the clavus entirely dark brown were found. In addition, in all examined specimens, the first antennomere was mostly pale brown with only extreme apex dark, clearly differing from other species (e. g. H. schwartzi, H. palolo, and H. takaii), in which apical part of the first antennomere is distinctly dark. The abdominal coloration pattern of male was also consistent among all examined specimens.