Bifaciomiris vietnamensis Kim & Jung, 2020

Kim, Junggon, Park, Haechul & Jung, Sunghoon, 2020, Bifaciomiris gen. nov., a new genus of the subfamily Mirinae (Hemiptera: Heteroptera: Miridae), with description of two new species, Zootaxa 4759 (4), pp. 557-565 : 562-564

Bifaciomiris vietnamensis Kim & Jung sp. nov.

( Figs. 1 D–F, 3A–H)

Diagnosis: Distinguished by the following combination of characters: body brownish; broad dark markings in posterior part of corium ( Figs. 1 D–F); not rounded, concave lateral margin and sharp hypophysis of right paramere ( Fig. 3B ); endosoma with six sclerites and one spicule; extremely elongated sclerite I, elongated sclerite II with narrow part subapically, broadly developed sclerite III without projected apex, elongated sclerite V with one large projection and tooth-like structure, long and curved sclerite VI, thick scythe-shaped spicule ( Figs. 3 C–E); oval lateral lobe, not reaching to lateral margin of interramal lobe, blunt and rounded medial apex of interramal lobe ( Figs. 3 G–H).

Description: Male: Body oval, length 3.49. COLORATION: mostly brownish. Head: pale brown dorsally, two-colored with reddish brown frons and entirely dark brown clypeus, mandibular plate and maxillary plate; antennae generally dark brown; first segment brown with dark stripe laterally; second segment entirely dark brown; third segment almost dark brown except for pale base; clypeus, mandibular and maxillary plates entirely dark brown; labium almost reddish brown, apical part of fourth segment dark brown, others reddish brown. Thorax: pronotum entirely brownish with reflection of dark coloration under pronotum; callus and anterior part of pronotum orange brown; pronotal collar brown; scutellum entirely blackish dark brown; hemelytra generally brownish orange; inner part of clavus dark brown with dark commissure, dark coloration connecting to scutellum; anterior part of corium slightly darker, postero-lateral and postero-medial parts with dark markings; cuneus with dark brown marking, apex of cuneus dark brown; legs almost brownish orange; femur with brownish rings subapically, tinged with red slightly; apex of tibia dark brown; third tarsal segment dark brown. Abdomen: entirely blackish dark brown, genital segment somewhat paler ventrally. SURFACE AND VESTITURE: as in generic description. STRUCTURE: Head: vertex width shorter than length of first antennal segment and longer than eye width in dorsal view; antennae cylindrical; first and second segment thicker than others; second antennal segment slightly thicker gradually toward apex; apex of labium slightly exceeding apex of hind coxae; proportion of first to fourth labial segments 0.4:0.4:0.3:0.4. Thorax: pronotum trapezoid, posterior margin of pronotum angled convexly; scutellum equilateral; lateral margin of hemelytra rounded; cuneal fracture well developed; membrane with two cells; legs generally slender; hind femur somewhat thick; tibia slender; third tarsal segment longer than others. Abdomen: rounded, reaching to apex of cuneus. GENITALIA: left paramere with upwardly developed sensory lobe, sensory lobe somewhat thick, apex of hypophysis sharp and curved medially ( Fig. 3A ); right paramere rod-shaped, lateral margin concave, not rounded, hypophysis somewhat thin, its apex sharp ( Fig. 3B ); endosoma with one spicule and six sclerites, membranous parts reduced; sc I extremely elongated with spinules, its apex sharp; sc II elongated, with narrow part subapically; sc III broadly developed apically, its apex somewhat triangular; sc IV long, its apex circular; sc V long, with one large projection and tooth-like structure, sc VI long and curved, scs short and thin, its apex sharp ( Figs. 3 C–E).

Female: Ovoid, length 3.54. COLORATION: as in male. SURFACE AND VESTITURE: as in male. STRUC- TURE: somewhat more rounded oval in overall shape than male. GENITALIA: sr elongated, tetragonal, closed to each other ( Fig. 3F ); llb positioned on irl, llb oval, not broadly developed, not reaching to lateral margin of irl; irl largely developed, with projection medially, its apex blunt; ms elongated oval ( Figs. 3 G–H).

Measurements (in mm): Male (n=1)/female (n=1) Body length, clypeus-apex of membrane: 3.49/3.54; head length, excluding collar: 0.27/0.26; head width, including compound eyes: 0.90/0.88; vertex width: 0.38/0.36; 1 st antennal segment length: 0.48/0.49; 2 nd antennal segment length: 1.47/1.35; 3 rd antennal segment length: 0.84/0.82; 4 th antennal segment length: missing/missing; total antennal length: 2.79 (4th missing)/2.66 (4th missing); 1 st labial segment length: 0.41/0.49; 2 nd labial segment length: 0.37/0.42; 3 rd labial segment length: 0.34/0.30; 4 th labial segment length: 0.46/0.50; total labial length: 1.58/1.71; mesal pronotal length: 0.69/0.67; basal pronotal maximal width (straight): 1.45/1.47; anterior scutellum width: 0.93/1.00; mesal scutellum length: 0.75/0.74; outer embolial margin length: 1.80/1.80; outer cuneal margin length: 0.59/0.57; maximal width across hemelytron: 0.90/0.91; hind leg (femur: tibia: tarsus): 1.51: 2.06: 0.62/1.45: 2.16: 0.51.

Materials examined: Holotype: [ NAAS] 1♂, Dalat , Lamdong prov., Vietnam, 13.vii.2011, Y.B. Lee leg.;

Paratype: [ NAAS] 1♀, Dalat , Lamdong prov., Vietnam, 13.vii.2011, 13.vii.2011, Y.B. Lee leg.

Etymology: Named after the type locality, Vietnam.

Distributions: Vietnam.

Host: Unknown.

Biology: Unknown.

Figures

FIGURE 1. Dorsal habitus and head structures of Bifaciomiris spp. A: B. koreanus sp. nov., male, Holotype; B: B. koreanus sp. nov., female, Paratype; C: head in frontal view; D: B. vietnamensis sp. nov., male, Holotype; E: B. vietnamensis sp. nov., female, Paratype; F: head in frontal view; G: head in lateral view. A–C: B. koreanus sp. nov.; D–G: B. vietnamensis sp. nov. Scale bar: 1mm.

FIGURE 3. Genital structures of male and female of B. vietnamensis sp. nov. A: left paramere; B: right paramere; C–D: endosoma; E: endosoma, drawing; F: sclerotized rings; G: posterior wall; H: posterior wall, drawing. Scale bar: 0.1mm.