Diaparsis (Diaparsis) kappa Khalaim & Villemant, 2021

Khalaim, Andrey I. & Villemant, Claire, 2021, Tersilochinae (Hymenoptera: Ichneumonidae) of Papua New Guinea: genus Diaparsis Förster, part 2. Species with notaulus, Zootaxa 5016 (1), pp. 56-80 : 72

8. Diaparsis (Diaparsis) kappa Khalaim & Villemant , sp. nov.

( Figs 43–46 )

Material examined. Holotype female ( MNHN) PNG, Madang Prov., Mt. Wilhelm (-5.815272, 145.1565), 2700 m, 31.X–1.XI. 2012, leg. Kua, Yalang, Novotny & Leponce, Plot 1, understorey; MAL-MW2700A-16/16-d16, P2963-8862.

Description. Female. Body length 3.7 mm. Fore wing length 3.0 mm.

Head strongly rounded and constricted behind eyes in dorsal view; gena 0.75× as long as eye width. Clypeus 2.8× as broad as long, lenticular, separated from face by broad groove, polished, with fine and sparse punctures in upper 0.6, convex in lateral view. Mandible slender, weakly constricted at base, with upper tooth almost 3.0× longer than lower tooth. Malar space 0.6× as long as basal mandibular width. Antennal flagellum slender, filiform, with 18 flagellomeres ( Fig. 44 ); subbasal flagellomeres 1.8–2.0× and subapical flagellomeres 1.4–1.5× as long as broad; flagellomeres 4 to 6 bearing subapical finger-shaped structures on outer surface. Face weakly convex, with very shallow median prominence. Face with fine punctures on shallowly granulate (lateral nearly smooth) background. Frons finely and shallowly granulate, with very fine (mostly indistinct) punctures. Vertex finely granulate medially and smooth laterally, with sparse inconspicuous punctures. Gena smooth and shining, without distinct punctures. Occipital carina complete, arcuate in dorsal view.

Mesoscutum, mesopleuron and dorsolateral area of propodeum with distinct and dense punctures on finely and shallowly granulate background. Notaulus with distinct longitudinal wrinkle (and several short and weak irregular wrinkles) on anterolateral side of mesoscutum. Scutellum with lateral longitudinal carinae present in basal half. Upper end of epicnemial carina abruptly curved to reach anterior margin of mesopleuron. Foveate groove situated on anterior 0.6 of mesopleuron, oblique, moderately deep, not reaching epicnemial carina anteriorly, with short transverse wrinkles ( Fig. 45 ). Propodeum with basal keel which is 0.4× as long as apical area. Propodeal spiracle separated from pleural carina by almost 2.0× diameter of spiracle ( Fig. 45 ). Apical area slightly convex, pointed anteriorly (as in Fig. 15 ); apical longitudinal carinae complete, reaching transverse carina anteriorly.

Fore wing with second recurrent vein (2m-cu) postfurcal, weakly pigmented in anterior 0.4 and distinct posteriorly. First abscissa of radius (Rs+2r) straight, longer than width of pterostigma. First and second sections of radius (Rs+2r and Rs) meeting at slightly acute angle. Intercubitus (2rs-m) short and thick, much shorter than abscissa of cubitus between intercubitus and second recurrent vein (abscissa of M between 2rs-m and 2m-cu). Metacarpus (R1) almost reaching tip of the wing. Second abscissa of postnervulus (Cu&2cu-a) present. Hind wing with nervellus (cu1&cu-a) weakly reclivous, slanted about 80° from horizontal. Legs slender; tarsal claws long, not pectinate.

First tergite slender, 5.2× as long as posteriorly broad, round in cross-section centrally, entirely polished, without glymma; tergite weakly and evenly widened from base to apex in dorsal view, with petiole not separated from postpetiole; upper margin of tergite, in lateral view, convex in basal and apical 0.3, and straight centrally. Second tergite 1.7× as long as anteriorly broad. Thyridial depression about twice as long as broad, with posterior end rounded. Ovipositor robust, weakly bent upwards, with shallow dorsal subapical depression and rounded tooth before this depression ( Fig. 46 ); sheath broken, probably 0.7× as long as first tergite ( Fig. 43 ).

Head, mesosoma and first tergite black; lower 0.4 of clypeus brownish yellow. Palpi and mandible (teeth reddish brown) yellow. Scape and pedicel of antenna yellow, dorsally brown; flagellum black, flagellomeres 1–3 ventrally brownish. Tegula brownish yellow. Pterostigma pale brown. Legs yellow-brown; distal tarsomeres of fore and mid legs infuscate; tibia and tarsus of hind leg fuscous. Metasoma posterior to first tergite predominantly brown, with distal end brownish yellow.

Male. Unknown.

Etymology. The species is named after the tenth letter of the Greek alphabet (kappa).

Distribution. Papua New Guinea.

Comparison. Diaparsis kappa sp. nov. is similar to D. iota sp. nov. and D. theta sp. nov., but differs from the former species by longer gena, longer lateral longitudinal carinae of scutellum, shorter second tergite, distinct foveate groove of mesopleuron, and shape and length of the ovipositor ( Fig. 46 ), and from the latter species by slender antennal flagellum ( Fig. 44 ), slightly longer malar space and abruptly curved upper end of epicnemial carina ( Fig. 45 ).

Figures

FIGURES 43–46. Diaparsis kappa sp. nov., holotype, female: 43—habitus, lateral; 44 –antenna, lateral; 45—head and mesosoma, lateral; 46—ovipositor, lateral.

FIGURES 9–16. Diaparsis beta sp. nov., holotype (9) and paratype (10), females: 9—head, mesosoma and base of metasoma, lateral; 10—ovipositor, lateral. Diaparsis delta sp. nov., holotype, female: 11—habitus (without wing apices), lateral; 12—head, front; 13—antenna, postero-lateral; 14—head and mesoscutum, dorsal; 15—propodeum, dorsal; 16—apex of tergite 1 and tergite 2, dorsal.