Spilichneumon mongolicus Riedel, 2021, nov.sp.
Creators: name: Riedel, Matthias
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Spilichneumon
Spilichneumon mongolicus

description: Spilichneumon mongolicus nov.sp. (figs 25, 91-93)   
H o l o t y p e: (♀) "Mongolia-C, 90 km NE Tsetserleg, N45°03´, E 102°25´, 1400 m, 27.VII.2005, Kadlecová lg." (Linz). P a r a t y p e s: (♀) " MGL [Mongolia]- Arkhangay, 25 km NE Tsetserleg, N 47°38´E 101°45´, 1730 m, 23.VII.2004, M. Kadlecová leg." (Linz); (2♀♀) " MGL [Mongolia]- Övörkhangay, 12 km E Arvaykheer, 46°22´N 102°49´E, 1770 m, 3.VII.2004, leg. J. Halada " (Linz and coll. Riedel).  
 D e s c r i p t i o n: ♀: Body length 12.8-14.0 mm. Flagellum stout and almost filiform, with 33-34 flagellomeres; 1 st flagellomere 1.5× longer than wide, 3 rd flagellomere square; preapical flagellomere about square. Temple ± parallel behind eyes and slightly narrowed posteriorly, dorsally c. 0.75× as long as eye. OED 1.6× and OOD 1.6× ocellar diameter. Frons rugose-punctate. Face rugose-punctate, ± dull. Clypeus large, 2.5× wider than long, densely punctate and shining; apical margin sharp and straight. Gena 1.3× as wide as eye, with scattered punctures ventrally. Mandible strongly swollen, with two short equally sized teeth. MI 0.5. Genal carina complete, reaching hypostomal carina far from mandibular base; hypostomal carina moderately elevated (1.5× width of preapical maxillary palp).   
 Mesosoma covered with short brownish hairs. Notaulus short impressed at frontal margin of mesoscutum. Mesoscutum densely punctate, shining. Mesopleuron densely punctate, striate-punctate in posterior half. Metapleuron striate-punctate; juxtacoxal carina present. Scutellum slightly elevated, slightly wider than long, finely punctate, without lateral carina. Propodeum rugose-punctate. Area superomedia almost rectangular, 1.3× longer than wide; anterior transverse carina absent. Hind coxa densely punctate and pilose, but without distinct scopa. Hind femur 3.3-3.4× longer than wide, with scattered punctures in ventral 1/3-1/2. Fore and mid tibiae with multiple external spurs. Tarsi not widened, 3 rd mid tarsomere 1.5× longer than wide. Claws not pectinate. Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 2-4× their width; vein 2m-cu slightly distad its middle. Vein 1cu-a strongly postfurcal (by 3× its width).   
 Metasoma amblypygous, stout; 2 nd and 3 rd sternites with median folds. Postpetiolus strongly widened, without dorsal carina; lateral field with scattered punctures, median field finely aciculate. 2 nd tergite 0.85-0.92× as long as wide. Gastrocoelus moderately impressed, almost triangular, with few ridges. Thyridium slightly oblique, 0.8× as wide as the interval. 2 nd to 4 th tergites finely and densely punctate, ± shining. Following tergites with superficial punctures. Ovipositor sheath slightly reaching behind metasomal apex.   
 Color: black. Flagellomeres 7-12, scutellum, wide apical band on 4 th tergite, shorter apical band on 5 th tergite and apico-medial spot on 7 th tergite ivory. 6 th tergite entirely black (in 2 specimens) or with small ivory spot (in 2 specimens). Sometimes flagellomeres 3-7 ± reddish. 2 nd tergite red, black in posterior 0.1-0.3; 3 rd tergite red in anterior 0.4-0.6, black apically. Legs black; fore and mid tibiae and tarsi red; sometimes hind trochantellus red; hind tibia red, with diffuse subbasal yellowish ring, black in apical 0.25; hind tarsus reddish. Wings moderately infuscate; pterostigma yellowish or reddish. ♁ unknown.   
 R e m a r k: This new species is characterized by its swollen mandible, wide temple, partly blackish 2 nd and 3 rd tergites and entirely or mainly black 6 th tergite. It is closely related to Spilichneumon limnophilus THOMSON and runs to this species in the key for European Spilichneumon species (RASNITSYN & SIYTAN 1981: 621-622), but differs by its stouter and differently colored metasoma, wider temple and equally sized mandibular teeth.
description: Published as part of Riedel, Matthias, 2021, A New Contribution to the Knowledge of the East Palaearctic Ichneumoninae (Hymenoptera, Ichneumonidae), pp. 171-240 in Linzer biologische Beiträge 53 (1) on pages 210-211, DOI: 10.5281/zenodo.13153969