Ichneumon brevimaculatus, Riedel, 2020

Riedel, Matthias, 2020, Contribution to the knowledge of Ichneumoninae of Siberia and Far East Russia (Hymenoptera, Ichneumonidae), Beiträge Zur Entomologie = Contributions to Entomology 70 (2), pp. 365-386 : 375-376

Ichneumon brevimaculatus spec. nov.

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( Figs 21 , 27 , 35 )

Holotype:  “ Russia, Primorskiy kray, Ryazanovka , 14 km SW Slavyanka, 42.48° N 131.12° E, 50 m, 16.VI. 1993, leg. A. Taeger ” ( SDEI).

Description: . Body length 16 mm. Flagellum bristleshaped, with 41 flagellomeres; 1 st flagellomere 2.6x longer than wide, c. 11 th flagellomere square, widest flagellomeres about square; preapical flagellomere 1.1x longer than wide. Temple moderately and roundly narrowed behind eye, dorsally 0.8x as long as eye. Distance of lateral ocellus to eye 1.3x ocellar diameter. Frons coarsely rugose-punctate, with a median blunt crest-like elevation, smooth above antennal sockets. Face densely rugose-punctate and granulate, matte. Clypeus densely punctate, ± shining, apical margin slightly concave. Gena 1.2x wider than eye, densely punctate. Malar space 1.2x longer than width of mandibular base. Mandible with two teeth, lower tooth smaller than upper one. Genal carina complete, reaching hypostomal carina away from mandibular base, both carinae low.

Mesosoma covered with brownish hairs. Notaulus distinctly impressed in frontal 1/5 of mesoscutum. Mesoscutum densely punctate and granulate, matte. Mesopleuron and metapleuron densely rugose-punctate; juxtacoxal carina present. Scutellum moderately elevated, 1.2x wider than long, with scattered punctures and without lateral carina. Propodeum coarsely rugose. Area superomedia slightly hexagonal, 1.1x wider than long, rugose; costula weakly developed. Area petiolaris transversely rugose, with lateral carinae. Outer dentiparal edge with short blunt tooth-like extension. Hind coxa with dense punctures, without scopa. Hind femur densely punctate, 4.0x longer than wide.

Areolet pentagonal, frontal distance of intercubiti 2x their diameter; 2 nd recurrent vein distal to its middle. Nervulus slightly postfurcal (1x its width).

Metasoma strongly oxypygous, hypopygium short. Postpetiolus strongly widened, lateral field 0.8x as wide as the median one, punctate; median field largely smooth and shining, with some fine longitudinal striae and scattered punctures. 2 nd tergite very wide, 1.35x wider than long. Gastrocoelus impressed, with strong ridges; thyridium almost transverse, c. 0.7x as wide as the interval. 2 nd and 3 rd tergites very finely and densely rugose-punctate, ± matte. Following tergites granulate, slightly shining. 2 nd to 4 th sternites with median folds. Ovipositor sheath slightly extending behind metasomal apex.

Color: Black. Flagellomeres 8-12 with yellow stripes. Scutellum, triangular posterolateral spots on 1 st and 2 nd tergites and large median spots on 4 th to 7 th tergites yellow. Coxae and trochanters black; legs including trochantelli otherwise reddish. Wings with slightly yellowish tint; pterostigma yellow.

: unknown.

Remark: This new species belongs to group D sensu HILPERT (1992). In the key of Siberian Ichneumon species ( RIEDEL, 2018), it runs to couplet 22: Ichneumon quaesitorius LINNAEUS , but differs by the yellow spots on 1 st and 2 nd tergites and the completely red hind tibia and tarsus. The taxon resembles Ichneumon sexmaculatus MATSUMURA, 1912 , but differs by the large yellow spot on 4 th tergite and reddish legs.

Figures

Figs 21–23: Head from dorsal: 21. Ichneumon brevimaculatus spec. nov. : 22. Ichneumon flavocoxalis spec. nov. , 23. Ichneumon megextensorius spec. nov. , 24. Ichneumon flavotibialis spec. nov. – Figs 25–26: Protichneumon nigriventris spec. nov. : 25. Head from dorsal, 26. face.

Figs 27–34: Scutellum and propodeum: 27. Ichneumon brevimaculatus spec. nov. : 28. Ichneumon flavocoxalis spec. nov. , 29. Ichneumon polyxanthus (KRIECHBAUMER) , 30. Ichneumon megextentensorius spec. nov. , 31. Ichneumon pilocephalus spec. nov. , 32. Ichneumon flavotibialis spec. nov. , 33. Monontos baikalensis spec. nov. : 34. Protichneumon nigriventris spec. nov.

Figs 35–40: Basal tergites of: 35. Ichneumon brevimaculatus spec. nov. , 36. Ichneumon polyxanthus (KRIECHBAUMER) , 37. Ichneumon megextensorius spec. nov. , 38. Ichneumon pilocephalus spec. nov. , 39. Ichneumon flavotibialis spec. nov., 40. Monontos baikalensis spec. nov.