Asthenolabus clypealis, Riedel, 2023

Riedel, Matthias, 2023, Notes on Ichneumoninae (Hymenoptera, Ichneumonidae) from southern China, with descriptions of one new genus and twelve new species, Contributions to Entomology 73 (2), pp. 223-248 : 223

Asthenolabus clypealis sp. nov.

Figs 53-56

Type material.

Holotype: (♀) China, Yunnan, Tengchong 35 km SE: Gongshan, 24.828°N, 98.767°E, 2200 m elev., 28.V.2009, leg. Blank, Liston, Taeger.

Etymology.

The species name refers to the clypeus, which is distinctly convex in this species.

Description.

Female. Body length 10 mm. Flagellum with 37 segments, slender and bristle-shaped; 1st flagellar segment 5.8 × as long as wide, all segments longer than wide. Temple distinctly and almost linearly narrowed behind eye. OED 1.0 × and OOD 0.9 × ocellar diameter. Temple and frons finely granulate, ± shining. Face finely rugose-punctate. Clypeus distinctly convex, rugose-punctate in basal half, with rather dense punctures in apical half; apical margin sharp, rounded. Mandible with two teeth, ventral tooth smaller than dorsal one and moderately bent inwards (by 45°). Malar space 0.7 × as long as width of mandibular base. Palpi unmodified, not swollen. Gena with fine dense punctures ventrally. Genal carina reaching hypostomal carina close to mandibular base, both carinae low.

Mesoscutum finely and densely rugose-punctate, dull. Notaulus not impressed. Mesopleuron and metapleuron densely rugose-punctate; speculum with dense fine punctures. Juxtacoxal carina indicated by some irregular rugae. Scutellum moderately elevated, about as long as wide, with complete lateral carina and rather dense fine punctures. Propodeum rugose-punctate, without apophysis, with long-oval spiracles. Area basalis trapezoid, ca. 2 × as wide as long. Area superomedia quadrangular, about as long as wide. Costula absent. Area petiolaris with lateral carina and transverse rugae. Hind coxa finely and densely punctate, without scopa. Hind femur densely punctate, 4.9 × as long as wide. Tarsal claws simple. Areolet almost quadrangular, frontal distance between veins 2rs-m and 3rs-m 1 × diameter of these veins. Vein 1cu-a slightly postfurcal.

Metasoma amblypygous. Petiole wider than high. Postpetiole slightly widened, without distinct latero-medial carina; median field slightly elevated and finely granulate, lateral field finely rugose. Gastrocoelus weakly impressed, with some rugae. Thyridium slightly oblique, 0.6 × as wide as interval between thyridia. 2nd tergite about as long as wide. 2nd and 3rd tergites finely granulate and dull, 2nd tergite finely rugose between thyridia. Following tergites ± shining. Ovipositor sheath not reaching beyond metasomal apex.

Colour. Black. Flagellum black; flagellar segments 8-14 ivory. Head blackish; reddish are mandible, except teeth, clypeus, face, wide outer and vertical orbits and scape ventrally. Yellowish are palps, facial orbit (widened dorsally), frontal orbit, malar space and gena. Mesosoma blackish, with extended reddish suffusion. Reddish are mesoscutum, dorsal pronotum, ventral suffusion of mesopleuron and frontal suffusion of metapleuron and lateral parts of propodeum. Cream yellow are frontal and upper margins of pronotum, spot of tegula, subtegular ridge and scutellum. Petiole black; postpetiole and following tergites reddish; 2nd and 3rd tergites diffusely reddish-brown in basal half. Legs mainly reddish. Fore- and mid-coxae with yellowish spots frontally. Trochanters ± brownish. Hind femur in apical 0.1 and hind tibia in apical 0.6 blackish; hind tarsus, except brown distal tarsomere, ivory. Wings hyaline; pterostigma black.

Male. Unknown.

Remarks.

This new species differs from the other known Oriental ♀♀ of Asthenolabus Heinrich by the entirely ivory 1st to 4th hind tarsomeres. It might represent the unknown ♀ of A. vietnamensis Riedel, 2011, which also has ivory hind tarsi, but differs from A. vietnamensis by the less extensive ivory colouration of the head and mesosoma.

Figures

Figures 53 - 56. Asthenolabus clypealis sp. nov. HT: 53. Face, frontal view; 54. Head, dorsal view; 55. Propodeum, dorsal view; 56. Basal tergites, dorsal view.