Ichneumon nigrostriatus, Riedel, 2021
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publication ID |
https://doi.org/ 10.5281/zenodo.13153969 |
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persistent identifier |
https://treatment.plazi.org/id/351687FF-2900-A406-FF6B-FF3F089DFA22 |
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treatment provided by |
Felipe |
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scientific name |
Ichneumon nigrostriatus |
| status |
sp. nov. |
Ichneumon nigrostriatus nov.sp. ( figs 21 View Figs 19-22 , 62 View Figs 61-64 , 74 View Figs 73-76 )
H o l o t y p e: (♀) " Mongolia, 100 km E Ulanbatar, 20 km NE Tereltz, Tuul river, 15-21.VII.2003, leg. J. Halada" (Linz). P a r a t y p e: (♀) " Mongolia, 90 km N Ulanbatar, Segnez riv., 1450 m, 6-8.VII.2003, leg. J. Halada" (Linz).
D e s c r i p t i o n: ♀: Body length 14-15 mm. Flagellum moderately lanceolate, with 47 flagellomeres; 1 st flagellomere 1.6-1.8× longer than wide, 8 th flagellomere square, widest flagellomeres 1.6× wider than long; preapical flagellomere 0.72× as long as wide. Head covered with short brownish hairs. Temple slightly and roundly narrowed behind eyes, dorsally 1.0× as long as eye. OED 1.8× and OOD 1.6× ocellar diameter. Occiput coarsely and transversely rugose-punctate. Frons and face rugose-punctate. Clypeus slighly convex, with scattered punctures apically. Gena 1.1× as wide as eye, with scattered punctures ventrally. Mandible long, with very small lower tooth indicated as small indentation at lower margin of the blunt upper tooth (mandible appears almost unidentate). MI 1.2; malar space 1.1× as long as 1 st flagellomere. Genal carina complete, reaching hypostomal carina far from mandibular base; both carinae low.
Mesosoma covered with short brownish hairs. Mesoscutum densely punctate, ± shining. Mesopleuron and metapleuron coarsely and densely rugose-punctate and striate; juxtacoxal carina present. Scutellum slightly elevated, slightly wider than long, with fine scattered punctures, without lateral carina. Propodeum rugose. Area superomedia rectangular, 1.3× longer than wide; anterior transversal carina absent. Hind coxa with coarse rather dense punctures ventrally, with brown hairs but without distinct scopa. Hind femur 3.8× longer than wide, with scattered punctures in ventral half. Tarsi slender, 3 rd mid tarsomere 1.7× longer than wide.
Metasoma strongly oxypygous, hypopygium short. Postpetiolus moderately widened, lateral field punctate and partly striate, 0.6× as wide as median field; median field with c. 20 fine regular striae. 2 nd tergite 0.75× as long as wide. Gastrocoelus impressed, with strong ridges. Thyridium oblique, 0.8-0.9× as wide as the interval. 2 nd and 3 rd tergites very finely and densely punctate, 2 nd tergite finely rugose-punctate anteriorly. Ovipositor sheath shortly extending behind metasomal apex.
Color: black. Stripes on flagellomeres 10-14 ivory. Scutellum centrally or mainly and medio-apical longitudinal stripes on 6 th and 7 th tergites (holotype) or only on 7 th tergite (paratype) yellow. Narrow stripe on frontal orbit (slightly widened opposite lateral ocellus) and collar reddish. 2 nd and 3 rd tergites yellowish-red, with narrow basal and apical black bands. Legs black; fore femur apically and fore tibia frontally yellowish or ochreous. Wings moderately infuscate; pterostigma reddish.
♁ unknown.
R e m a r k: This new species is characterized by the coloration of metasoma, black legs and almost unidentate mandible. In the key of Siberian Ichneumon species ( RIEDEL 2018), it runs to Ichneumon hypolius THOMSON , but differs by the black anterior and posterior stripes on 2 nd and 3 rd tergites and the modified form of mandible.
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