Syspasis nigrithorax, 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 : 787-788

Syspasis nigrithorax nov.sp. (figs 6, 28, 39, 53)

H o l o t y p e: (♀) Usbekistan, Aman-Kutan, 29.V.1997, leg. Dolin (ZSM).

P a r a t y p e s: (♀) KGZ, Batken , Distr. Batken, Tokhta-Boz-Geb., E Kyzyl-Ayrak, 40°02´25´´N / 70°10´42´´ E, 1630-1700 m MSL, 15.06.2010, 2010/229 TF, leg. H. u. R. Rausch (Linz); (♀) Kazakhstan mer., Issik 3 km S, 22.- 23.6.1992, leg. K. Denes (Linz); (♁) Kirgyz. Kirg. Mt , Ala- Archa river, Kahsasi, VI.1999, coll. V. Gurko (Linz); (♁) Kazakhstan mer., Vaneka 80 km E Djambul , 30.6.92, leg. Jirousek (Linz); (♀) Kirgisistan [ Kyrgyzstan], Tschatnal , Ala-Buka Umgeb., 1930 m, 09. VI.1998, leg. W. Dolin ( ZSM); (♀) NE Kazakhstan, Sargat Mt. / Saur Mts., 2000 m, 12.6.1999, leg. Osipov (coll. Riedel); (♀) Tadzhikistan, Ganishob v., 10 km SW of Tadzhikabad / Peter I mt. 2200 m, 18-21. VI.2003 (coll. Riedel) .

M a t e r i a l e x a m i n e d: 5♀♀ and 2♁♁ from Kazakhstan, Kyrgyzstan, Tajikistan, Uzbekistan.

D e s c r i p t i o n: ♀: Body length 8.0- 9.5 mm. Flagellum with 32-33 flagellomeres, slightly lanceolate; 1 st flagellomere 2.2-2.5× and 2 nd flagellomere 2.0× longer than wide, combined length 0.55× eye length; 9 th to 11 th flagellomeres square; widest flagellomeres 1.2-1.3× wider than long. Temple moderately and roundly narrowed behind eye, dorsally 0.5-0.6× as wide as eye. OED 1.0× ocellar diameter. Frons transversely rugose, smooth above antennal grooves. Face densely rugose-punctate. Clypeus moderately convex, punctate; apical margin sharp, straight. Gena with scattered or rather dense punctures ventrally, 0.9-1.0× as wide as eye. MI 0.8-1.0. Genal carina reaching hypostomal carina away from mandibular base, sometimes hypostomal carina slightly elevated. Mesosoma with short pale brownish hairs. Side of pronotum mainly striate-rugose; upper margin punctate. Notaulus impressed at frontal margin of mesoscutum. Mesoscutum densely punctate, shining. Mesopleuron and metapleuron densely punctate, partly rugose-punctate; juxtacoxal carina present. Scutellum moderately elevated, 1.2× wider than long, with ratehr dense punctures and lateral carina in anterior 0.4-0.7. Area basalis bulging forward medially. Area superomedia horseshoe-shaped, 1.2× wider than long; anterior transversal carina in or slightly posterior its middle. Area externa densely punctate. Area petiolaris rugose, lateral border indicated by irregular rugae. Hind coxa densely punctate and pilose, but without distinct scopa. Hind femur densely punctate, 3.7-4.1× longer than wide. Hind tibia with 7-8 denticular spurs externally. Areolet pentagonal, frontal distance between 2rs-m and 3rs-m 2× their width; vein 2m-cu in or distad its middle. Vein 1cu-a interstitial or slightly antefurcal. Metasoma oxypygous, 2 nd to 5 th sternites with median folds. Postpetiolus strongly widened, with weak dorsal carinae. Lateral field 0.8-1.1× as wide as median field, punctate; median field finely aciculate and punctate, sometimes almost smooth. Gastrocoelus distinctly impressed, with oblique ridges. Thyridium almost transverse, 0.9-1.3× as wide as the interval between thyridia. 2 nd tergite 0.75-0.80× as long as wide. 2 nd to 4 th tergites densely punctate and ± shining. Ovipositor sheath slightly extending behind metasomal apex (by length of 7 th tergite).

Color: black. Flagellum black, sometimes weak yellow stripes on flagellomeres 10/12- 13. Narrow stripes on inner and outer orbits ivory. Mesosoma entirely black. 1 st tergite black; postpetiolus apically and 2 nd to 7 th tergites entirely red. Coxae and trochanters black; legs including trochantelli otherwise red; hind tibia narrowly infuscate apically (by 0.5× tibial width); hind tarsus brown. Wings ± infuscate; pterostigma brownish.

Var. ♀ from Tajikistan: legs black; hind femur black; fore tibia with yellow stripe frontally. ♁: Body length 8.5-9 mm. Flagellum with 33 flagellomeres; 1st flagellomere 2.5× longer than wide. Tyloids on flagellomeres 7-14, long-oval, maximally 0.7× as long as their flagellomeres. Temple moderately and roundly narrowed behind eye, dorsally 0.45× as long as eye. Distance between lateral ocellus and eye 0.85-1.0× ocellar diameter. Malar space 0.5-0.6× as long as width of mandibular base. Area superomedia heart- or horseshoe-shaped, slightly longer than wide or wider than long. Hind femur 4.0-4.1× longer than wide. Thyridium transverse, 1.1-1.25× wider than the interval between thyridia. 2 nd tergite 0.85-0.9× as long as wide. 2 nd to 5 th tergites with dense punctures, 6 th tergite with superficial punctures. Apical margin of hypopygium roundly elongate medially. Structure otherwise as in ♀.

Color: black. Flagellum black. Sometimes hind edge of pronotum with small yellowish spot. Color otherwise as described for the ♀.

Hosts: unknown.