Scopesis rugulosa RIEDEL, 2024

Riedel, Matthias, H, Andres & Schmidt, Stefan, 2024, Revision of the Palaearctic species of Scopesis FÖRSTER (Hymenoptera, Ichneumonidae, Ctenopelmatinae), Linzer biologische Beiträge 56 (1), pp. 201-252 : 220-221

Scopesis rugulosa RIEDEL nov.sp. (figs 11, 65, 85)

Holotype: (♀) 1.VII.74; L. X.1973 Alfeld; ex Tenthredopsis annuligera (Tenthr.); frontator ♀ ( ZSM).

D e s c r i p t i o n: ♀. Body length 6.0 mm. Flagellum with 37 segments; 1 st flagellar segment 4.4× as long as wide and 2.0× as long as 2 nd segment; 2 nd segment 2.3×, 3 rd segment 2.1× and preapical segment 1.5× as long as wide. Temple distinctly and almost linearly narrowed behind eye; dorsally 0.7× as long as eye. OED 1.4× ocellar diameter. Face granulated; inner orbits slightly convergent ventrally. Clypeus weakly convex, not bulging medially, almost straight apically, without distinct extensions laterally. Lower mandibular tooth slightly longer than upper one. MI 0.3.

Mesoscutum granulate, dull. Notaulus impressed in frontal 0.3 of mesoscutum. Mesopleuron irregularly rugose-striate, without distinct punctures, dull. Speculum with microsculpture, slightly shining. Hind femur 4.5× as long as wide. Inner apical spur of hind tibia 0.67× as long as hind metatarsus. Area superomedia without lateral carina; area petiolaris widely interrupted medially. Lateral longitudinal and pleural carinae of propodeum weak but complete. Vein 2rs-m 0.6× as long as vein M between veins 2rs-m and 2-mcu. Vein 1cu-a postfurcal by 1× its width. Nervellus of hind wing vertical, intercepted in its apical 0.7. 1 st tergite 1.8× as long as wide, without dorsal carina. 2 nd tergite 1.1× as wide as long.

Color: black. Flagellum ochreous, infuscate basally. Palps, mandible except teeth, clypeus, hind edge of pronotum and tegula yellow. 1 st tergite in apical 0.25 and 2 nd to 4 th tergites entirely red. Coxae, trochanters and trochantelli black; mid trochantellus ± yellowish; legs otherwise red; hind femur slightly infuscate apically, hind tibia cream-yellow, black in apical 0.3; hind tarsomeres blackish. Pterostigma hyaline-yellow.

♁ unknown.

Host: Tenthredopsis tischbeinii (FRIVALDSKY, 1876) (Hym. Tenthredinidae ) ( ZSM).

D i s t r i b u t i o n: Only known from the German holotype.

Taxonomical remarks: This specimen was determined as Sc. frontator by HINZ, but seems to be closely related to Sc. macropus (THOMSON) . Due its small size, characteristic structure of mesopleuron and long 1 st tergite, it is described as a separate species here, but might represent a very small (host-depended?) specimen of Scopesis macropus (THOMSON) . For a definitive decision, more material, host records and genomic studies are necessary in the future.