Protichneumon nigriventris, 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 : 370-371

Protichneumon nigriventris spec. nov.

urn:lsid:zoobank.org:act:98F723A9-B2A8-44D8-B118-83F88FAEAE7E

( Figs 4 , 25, 26, 34)

Holotype:  “USSR, Maritime Prov., Russky I., Aiax Bay ,

15.VIII.74, V. Zherichin” ( ZSM).

Description: . Body length 25 mm. Flagellum lanceolate, with 46 flagellomeres; 1 st flagellomere 1.8x longer than wide, 2 nd flagellomere 1.4x longer than wide; widest flagellomere 2.4x wider than long. Temple slightly narrowed behind eye. Distance of lateral ocellus to eye 1.4x ocellar diameter. Frons with fine and transversal rugose-striation. Face and clypeus with coarse punctation and fine granulation. Apical margin of clypeus with a wide roundish medial extension. Malar space c. 0.8x as long as width of mandibular base. Gena 1.1x wider than eye, with scattered punctures ventrally. Genal carina reaching hypostomal carina far from mandibular base, both carinae low.

Mesosoma covered with short brownish hairs. Pronotum with superficial punctures dorsally and fine longitudinal striation in ventral 2/3. Notaulus distinctly impressed in frontal fifth of mesoscutum. Mesoscutum with dense punctures, finely granulate, but shining. Mesopleuron with coarse punctures, partly striate; speculum smooth and shining. Metapleuron with coarse punctures; juxtacoxal carina present. Scutellum slightly convex, slightly longer than wide, with lateral carina in basal 0.4, with scattered punctures. Propodeum rounded and coarsely rugose. Area superomedia dome-shaped, slightly longer than wide, smooth, distinctly raised above propodeal surface frontally; costula in its middle. Area externa with fine transverse striation. Hind coxa densely punctate, with whitish scopa (length 1/3 of coxal length). Hind femur very stout, c. 2.8x longer than wide, densely punctate.

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

Metasoma oxypygous, hypopygium short. Postpetiolus strongly widened; lateral field punctate, 0.7–0.8x as wide as median field, the latter with fine longitudinal aciculation. Thyridium slightly oblique, 1.2x wider than their interval. 2 nd tergite 1.1x wider than long. 2 nd and 3 rd tergites densely punctate, with longitudinal rugose-striation between gastrocoeli. Following tergites with superficial punctures, shining. Ovipositor sheath slightly extending metasomal apex (by 0.4x length of 7 th tergite).

Color: Black. Stripes on flagellomeres 8–14, palps, base of mandible, lateral spots of clypeus, small spot on gena, orbital stripe from upper facial to vertical orbit, collare, subtegular ridge, and apical 2/3 of scutellum yellow. Legs black; apical margins of all trochanters, apical spots on fore and mid femora, subbasal spots on all tibiae and subapical rings of all tarsomeres yellowish. Wings yellowish-hyaline; pterostigma reddish-brown.

Male unknown.

Remark: This new taxon is a typical Protichneumon species , but has an entirely black metasoma which resembles Protichneumon nakanensis (MATSUMURA, 1912) . It differs from P. nakanensis by its black mesoscutum and mesopleuron without yellow spots and mainly black legs with yellow rings of all tibiae and tarsi.

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. .