Syspasis sinensis, Riedel, 2021

Riedel, Matthias, 2021, Revision of the Palaearctic species of Syspasis TOWNES, 1965 (Hymenoptera, Ichneumonidae, Ichneumoninae), Linzer biologische Beiträge 53 (2), pp. 775-810 : 794-795

Syspasis sinensis nov.sp. (figs 12, 32, 45, 60)

H o l o t y p e: (♀) China, Beijing munic., Xiaolongmen Nat. Park, 39.58°N 115.26°E, 4- 10.VI.2016, leg. E. Jendek & O. Sausa (Linz).

M a t e r i a l e x a m i n e d: 1♀ fromNorthernChina.

D e s c r i p t i o n: ♀: Body length 11 mm. Flagellum moderately lanceolate, with 36 flagellomeres; 1 st flagellomere 2.0× and 2 nd flagellomere 2.1× longer than wide, combined length 0.48× eye length, c. 11 th flagellomere square, widest flagellomeres 1.5× wider than long. Temple slightly and roundly narrowed behind eye. OED 1.5× ocellar diameter. Frons densely punctate, transversely rugose medially. Face densely punctate, finely granulate. Clypeus slightly convex, with scattered punctures, shining. Mandible with two teeth; lower tooth very small and slightly bent inwards. MI 1.0. Gena 0.8× as wide eye, with scattered punctures ventrally. Genal carina reaching hypostomal carina far from mandibular base; hypostomal and genal carinae low. Mesosoma covered with pale brownish hairs. Mesoscutum densely punctate, finely granulate anteromedially. Mesopleuron and metapleuron coarsely and densely punctate, speculum with finer punctures; juxtacoxal carina present. Scutellum slightly elevated, about as long as wide, with fine punctures and lateral carina in anterior 0.2. Propodeum ± sloping apically. Area basalis with median tubercle anteriorly. Area superomedia heart-shaped, as long as wide; anterior transversal carina posterior its middle. Hind coxa densely punctate and pilose ventrally, but without distinct scopa. Hind femur densely punctate, 4.0× longer than wide. Claws not pectinate. Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 1-2× their width; vein 2m-cu in the middle. Vein 1cu-a interstitial. Metasoma strongly oxypygous. Postpetiolus moderately widened, without distinct dorsal carina; median field 1.4× as wide as lateral field, finely aciculate, lateral field punctate. Gastrocoelus strongly impressed, with strong ridges. Thyridium almost transverse, 1.4× wider than the interval between thyridia. 2 nd tergite 0.82× as long as wide. 2 nd and 3 rd tergites densely rugose-punctate, widely striate medially, 3 rd tergite only in basal third. 4 th tergite densely punctate and shining, 5 th tergite with superficial punctures. Ovipositor sheath reaching behind metasomal apex by 0.5× length of 7 th tergite.

Color: black. Flagellomeres 8-13 with ivory rings. Narrow stripes on frontal and upper outer orbits yellowish. Mesosoma entirely black. Petiolus black; postpetiolus and entire 2 nd and 3 rd tergites red, 4 th tergite only laterally. Legs black; fore femur apically and fore tibia and tarsus frontally ochreous. Wings slightly infuscate; pterostigma brown, paler centrally.

♁ unknown.

Hosts: unknown.

T a x o n o m i c a l r e m a r k: This new species resembles Syspasis optica (GRAVENHORST) which has been found in Europe and Kazakhstan so far. S. optica differs from this species by slenderer basal flagellomeres and distinctly and linearly narrowed temple. I propose a new species here, but it is not impossible that the Chinese material represents an East Palaearctic subspecies of S. optica .