Anisobas mongolicus, Riedel, 2021

Riedel, Matthias, 2021, A New Contribution to the Knowledge of the East Palaearctic Ichneumoninae (Hymenoptera, Ichneumonidae), Linzer biologische Beiträge 53 (1), pp. 171-240 : 174-175

Anisobas mongolicus nov.sp. (figs 5-8)

H o l o t y p e: (♀) " Mongolia, 100 km E Ulanbatar, 20 km NE Terenz, Tuul riv., 15- 21.7.2003, leg. J. Halada" (Linz).

D e s c r i p t i o n: Body length 10 mm. Flagellum with 29 flagellomeres, slightly lanceolate; 1 st flagellomere 2.7× longer than wide; 12 th flagellomere square; widest flagellomere 1.2× wider than long. Temple slightly widened behind eye, moderately narrowed posteriorly. OED 1.6× and OOD 1.7× ocellar diameter. Frons transversely and finely rugose-punctate, smooth above antennal sockets. Face densely punctate. Clypeus with scattered punctures apically; apical margin blunt, slightly biconcave, with weak blunt median tubercle. MI 1.0. Mandible with two teeth, upper tooth longer than lower one. Gena densely punctate. Genal carina reaching hypostomal carina close to mandibular base; both carinae low.

Mesosoma covered with grey hairs. Collar with very strong and lamelliform median ridge. Mesoscutum densely punctate, smooth and shining between punctures. Notaulus pit-like impressed at frontal margin of mesoscutum. Mesopleuron and metapleuron densely punctate; speculum smooth; juxtacoxal carina present. Epicnemial carina low. Scutellum moderately elevated, in profile rounded, slightly wider than long, with scattered fine punctures, without lateral carina. Area superomedia hexagonal, 1.8× wider than long; anterior transverse carina in its middle. Hind coxa densely punctate, without scopa. Hind femur densely punctate, 3.1× longer than wide; hind tibia with several denticular spurs externally; claws not pectinate. Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 4× their diameter; vein 2m-cu in its middle. Vein 1cu-a interstitial.

Metasoma semi-amblypygous; hypopygium about as long as the distance between its apical margin and metasomal apex. Postpetiolus moderately widened, without distinct dorsal carina; median field with scattered punctures, shining; lateral field with denser punctures. Gastrocoelus distinctly impressed, with longitudinal ridges. Thyridium slightly oblique, c. 0.6× as wide as the interval. 2 nd tergite 1.4× and 3 rd tergite 2.1× wider than long, densely punctate and shining; 2 nd tergite with very fine striation between gastroceli. Ovipositor sheath not reaching behind metasomal apex.

Color: black. Stripes on flagellomeres 7-11, narrow stripes on frontal orbit and on vertex, small spot on hind edge of pronotum and on subtegular ridge, scutellum and wide apical bands on 5 th to 7 th tergites ivory. 2 nd and 3 rd tergites basally and laterally diffusely reddish. Legs black; fore femur frontally and fore and mid tibiae and tarsi entirely reddish. Wings hyaline; pterostigma dark brown.

♁ unknown.

R e m a r k: This new species resembles the Japanese Anisobas artopoetese UCHIDA. It differs by its wider temple, shorter notaulus, rounded surface of scutellum and different sculpture of 2 nd tergite which is smooth and shining between punctures.

D i s t r i b u t i o n: Mongolia.