Allophrys tonkina Khalaim, 2018

Khalaim, Andrey I., 2018, The genera Allophrys Förster and Aneuclis Förster (Hymenoptera: Ichneumonidae: Tersilochinae) of Vietnam, Zootaxa 4378 (3), pp. 414-428 : 420

Allophrys tonkina Khalaim , sp. nov.

( Figs 14–16 )

Comparison. Allophrys tonkina differs from other Vietnamese species of Allophrys by its narrow and unusually long basal area of propodeum ( Fig. 16 ). It is also characterized by a long malar space, relatively thin foveate groove of mesopleuron ( Fig. 15 ), and interstitial second recurrent vein (2 m-cu).

Description. Female. Body length 3.25 mm. Fore wing length 2.25 mm.

Head strongly tapered, weakly rounded to straight behind eyes in dorsal view; temple 0.5–0.6× as long as eye width. Clypeus about 3.0× as broad as long, lenticular, slightly convex in lateral view, separated from face by sharp groove, smooth, with fine inconspicuous punctures in upper part. Mandible slender, with upper tooth much longer than lower tooth. Malar space 1.0–1.2× as long as basal mandibular width. Antennal flagellum slender, filiform, with 13 flagellomeres ( Fig. 14 ); second flagellomere 2.0–2.5×, subapical flagellomeres 1.1–1.3× as long as broad. Face, frons, vertex and temple granulate, dull, impunctate. Occipital carina complete laterally and absent dorsally. Hypostomal carina strong, complete.

Mesosoma mostly granulate, dull and impunctate; mesopleuron centrally finely to rather distinctly punctate, shallowly granulate to almost smooth between punctures. Scutellum with lateral longitudinal carinae present in its extreme base. Notaulus with strong wrinkle. Foveate groove extending in anterior 0.8 of mesopleuron, upcurved anteriorly, thin, with fine transverse wrinkles, not reaching anterior margin of mesopleuron ( Fig. 15 ). Propodeum with long and narrow basal area which is 3.5–4.0× as long as broad, about 0.8× as long as apical area and distinctly widened in anterior 0.3 ( Fig. 16 ); basal longitudinal carinae usually weak and indistinct. Propodeal spiracle separated from pleural carina by 1.5–2.0× diameter of spiracle. Apical area distinctly impressed along midline, narrowly rounded or truncated anteriorly ( Fig. 16 ); apical longitudinal carinae reaching transverse carina anteriorly.

Fore wing with second recurrent vein (2 m-cu) interstitial to weakly postfurcal, weakly pigmented in anterior part. Pterostigma broad, elongated. Intercubitus (2 rs-m) moderately long, slightly thickened. First abscissa of radius (Rs +2 r) weakly arcuate, as long as width of pterostigma. First and second sections of radius (Rs +2 r and Rs ) meeting at right angle. Metacarpus (R 1) not reaching tip of the wing. Second abscissa of postnervulus present. Hind wing with nervellus (cu 1& cu-a) distinctly reclivous, slanted about 45° from horizontal ( Fig. 15 ). Legs slender.

First tergite very slender, 4.8× as long as posteriorly broad, round in cross-section, polished, its upper margin in dorsal view more or less straight in basal 0.7 and arcuate in apical 0.3. Second tergite 2.6–3.0× (2.6× in holotype) as long as anteriorly broad. Thyridial depression 4.0× as long as broad or longer. Ovipositor slender, weakly upcurved, with shallow dorsal subapical depression; sheath 0.8× as long as first tergite in holotype and about 1.0–1.1× in paratypes.

Head and mesosoma black. Palpi and mandible yellow, mandibular teeth red. Clypeus yellow-brown or brown in its lower 0.4–0.5. Scape and pedicel of antenna yellow; flagellum brownish yellow basally to brown apically. Tegula yellow to brown. Pterostigma brown. Legs yellow; hind coxa extensively brown basally. First tergite brownish black to black. Metasoma behind first tergite yellow ventrally to brown dorsally.

Male. Unknown.

Variation. In some paratypes sculpture of head and mesosoma is smoother than in the holotype, e.g., sometimes temple, mesopleuron centrally and dorsolateral area of propodeum centrally are smooth. Foveate groove of mesopleuron in two paratypes from Dak Lak and Lam Dong provinces is much broader, reaching anterior margin of mesopleuron, with strong transverse wrinkles. In paratypes flagellum sometimes entirely fuscous, fore and mid coxae darkened with brown basally, and metasoma behind first tergite entirely brown.

Etymology. The species is named after the type locality, Tonkin region of Vietnam.

Material examined. Holotype female ( RMNH) Northwest Vietnam, Tonkin, Lai Châu Prov., Hoang Lien National Park [Nature Reserve since 2006], 15 km W of Sa Pa, 1900 m, Malaise traps, 15–21.X.1999, coll. C. v. Achterberg.

Paratypes. Northwest Vietnam: 1 ♀ ( ZISP) same data as holotype. South Vietnam: 1 ♀ ( RMNH) Dak Lak Prov., Chu Yang Sin National Park, Krong K’Mar , 550–610 m, Malaise trap 1–6, 21–26.X.2005, coll. C. v. Achterberg & R. de Vries . 1 ♀ ( RMNH) Lam Dong Prov., Bidoup Nulba National Park, near Da Lat , 1650–1700 m, Malaise trap 1–12, 11–19.X.2005, coll. C. v. Achterberg & R. de Vries.

Distribution. Oriental species: Northwest and South Vietnam.

Figures

FIGURES 14–18. Allophrys tonkina sp. nov., holotype ♀: 14—head with antenna, lateral; 15—head, mesosoma and base of metasoma, lateral; 16—propodeum, dorsal.Aneuclis pumilus, ♀: 17—head and mesoscutum,lateral; 18—propodeum and base of metasoma, dorsolateral.