Ichneumon taegeri, 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 : 381

Ichneumon taegeri spec. nov.

urn:lsid:zoobank.org:act:2EFB6CDD-10E9-4D81-8639-D8E54F68DC08

( Fig. 8 )

Holotype:  “ Russia, Primorskiy kray, Smarka 70 km N

Chuguyevka, 44.43 N 134.12 E, 30.V. 1993, 200 m, leg.

A. Taeger” ( SDEI).

Description: . Body length 14.5 mm. Flagellum slightly lanceolate, with 40 flagellomeres; 1 st flagellomere 1.6x longer than wide, 3 rd or 4 th flagellomere square, widest flagellomeres 1.5x wider than long; preapical flagellomere 0.9x as long as wide. Temple distinctly and almost linearly narrowed behind eye. Distance of lateral ocellus to eye 1.5x ocellar diameter. Frons and face transversely rugose-punctate. Clypeus with scattered punctures, intervals smooth and shining. Gena 1.1x wider than eye, with scattered punctures. Malar space as long as 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 shortly impressed at frontal margin of mesoscutum. Mesoscutum densely punctate, shining. Mesopleuron and metapleuron densely punctate, partly rugose; juxtacoxal carina present. Scutellum almost flat, about as long as wide, with dense punctures, without lateral carina. Propodeum completely carinate. Area superomedia square, rugose; costula absent. Area externa and area petiolaris rugose, area petiolaris without lateral carina. Outer dentiparal edge without tooth. Hind coxa with fine dense punctures, without scopa or crest. Hind femur with scattered punctures in ventral 1/4, 3.4x longer than wide. Tarsomeres slightly widened; 3 rd mid tarsomere c. 1.4x longer than wide.

Areolet pentagonal, frontal distance of intercubiti 3x their diameter; 2 nd recurrent vein distinctly distal to its middle. Nervulus postfurcal by 2x its width.

Metasoma semi-amblypygous, hypopygium moderately elongate (about as long as the distance of its hind margin to metasomal apex). Postpetiolus strongly widened and completely aciculate, lateral field 0.6x as wide as the median one. 2 nd tergite 1.3x wider than long. Gastrocoelus impressed, with strong ridges; thyridium slightly oblique, 0.8x as wide as the interval. 2 nd and 3 rd tergites granulate and with dense superficial punctures, ± matte; 2 nd tergite finely aciculate medially. Following tergites finely granulate, shining. 2 nd to 4 th sternites with median folds. Ovipositor sheath not extending behind metasomal apex.

Color: Black. Frontal orbit with narrow yellowish stripe. Stripes on flagellomeres 6-14, collare and upper margin of pronotum, subtegular ridge, scutellum, narrow apical band on 2 nd tergite (slightly widened medially), small median spot on 4 th tergite, and larger roundish spots on 5 th to 7 th tergites ivory. Legs black; fore tibia and tarsus reddish frontally; mid and hind tibiae with subbasal reddish-brown stripes. Wings with slight yellowish tint; pterostigma ochreous.

: unknown.

Remark: This new species belongs to group G2 sensu HILPERT (1992), but differs from all known species of this group by the typical coloration of metasoma with an apical ivory band on 2 nd tergite. This color pattern resembles Ichneumon rudolphi HOLMGREN which has been reported from Kamtschatka ( ROMAN, 1927: 11), but the new taxon differs from I. rudolphi by its larger size, smaller thyridium, extended ivory coloration of mesosoma, ivory spots on 4 th and 5 th tergites, and dark tibiae without yellow rings.

Figures

Figs 1–8: Habitus of: 1. Aoplus ocellator spec. nov. , 2. Chasmias paludator sibiricus subspec. nov., 3. Coelichneumon septenus TOWNES et al., new , 4. Protichneumon nigriventris spec. nov. , 5. Ichneumon flavocoxalis spec. nov., 6. Ichneumon megextensorius spec. nov., 7. Ichneumon pilocephalus spec. nov., , 8. Ichneumon taegeri spec. nov. .