Ichneumon pseudemancipatus, Riedel, 2018

Riedel, Matthias, 2018, Contribution to the Siberian species of Ichneumon LINNAEUS (Hymenoptera, Ichneumonidae, Ichneumoninae), Linzer biologische Beiträge 50 (2), pp. 1509-1562 : 1526-1527

Ichneumon pseudemancipatus nov.sp. ( figs 14 , 35 , 58 , 77 )

M a t e r i a l e x a m i n e d: Holotype: ♀ " S Siberia, Hakassia region, W Sayan mts 2400 m,

Sallyghem-Taiga region, 5 vii 2004, leg. Osipov" (coll. Riedel).

D e s c r i p t i o n: Body length 10 mm. Antenna moderately lanceolate, with 37 flagellomeres; 1 st flagellomere 1.8x longer than wide, c. 7 th flagellomere square, widest flagellomeres c.0.7x as long as wide; preapical flagellomere 1.05x longer than wide. Temple moderately and roundly narrowed behind eye. OOD 1.6. Frons coarsely rugosepunctate. Face coarsely punctate, rugose centrally, with fine granulation. Clypeus with rather dense punctures, finely granulate. Gena 1.1x as wide as eye, with rather dense punctures and fine striation in ventral 1/2. Malar space 1.5x as long as width of mandibular base and 1.2x as long as 1 st flagellomere. Genal carina complete, not interrupted ventrally. Hypostomal carina narrow.

Mesosoma covered with brownish hairs. Mesoscutum densely punctate, smooth and shining between punctures. Mesopleuron and metapleuron coarsely rugose-punctate; coxal carina present. Scutellum moderately elevated, about as long as wide, with rather dense punctures. Area superomedia rectangular, about as long as wide, apical carina absent; costula absent. Area petiolaris without lateral carina. Hind coxa densely punctate and granulate, with rather dense and long brownish hairs, but without scopa. Hind femur 3.9x longer than wide, densely but superficially punctate and granulate. Hind tibia with c.4 denticular spurs apico-externally. 3 rd mid tarsomere c.1.6x longer than wide.

Metasoma strongly oxypygous, hypopygium short. Postpetiolus strongly widened, median field c. 1.9x wider than the lateral one, with some indistinct aciculation basally and fine irregular rugae apically. 2 nd tergite 0.66x as long as wide. Gastrocoelus strongly impressed, with strong ridges; thyridium large, transverse, c.1.3x wider than the interval. 2 nd and 3 rd tergites with dense fine punctures, granulate and ± opaque, not rugose. Ovipositor sheath slightly extending behind metasomal apex.

Color: Black. Scapus and pedicel black. Flagellomeres 1-8 red, flagellomeres 9-12 more yellowish-red. Scutellum yellow, mesosoma otherwise black. Median field of postpetiolus, 2 nd and 3 rd tergites red, 3 rd tergite with black band in apical 1/4. 6 th and 7 th tergite with roundish ivory spots medially. Coxae and trochanters black; legs otherwise red; mid femur black in basal 1/2; hind femur black, red in basal and apical 1/5. Hind tibia and tarsus red, distal hind tarsomere partly brownish. Wings with moderate brownish tint, pterostigma yellow.

Males unknown.

T a x o n o m i c a l r e m a r k The species belongs to group C sensu HILPERT (1992) and is closely related to Ichneumon emancipatus WESMAEL and Ichneumon emancipatops HEINRICH. It can be differentiated from the former species by shorter 1 st flagellomere, absence of ivory spot on 5 th tergite and red hind tibia and tarsus (except brownish distal tarsomere). It differs from the latter taxon by the black scapus and pedicel, black mesosoma (except scutellum), absence of ivory spot on 5 th tergite and strongly orthogonal thyridia.

Due to the limited East Palaearctic material, the status of Ichneumon emancipatops and Ichneumon pseudemancipatus remains unclear. It is possible that both species might be variants or subspecies of Ichneumon emancipatus (see HILPERT 1992: 108).

Figures

Figs 13-16: Habitus of: (13) Ichneumon paravulnerator nov.sp.; (14) I. pseudemancipatus nov.sp.; (15) I. rufolateralis nov.sp.; (16) I. sayanicus nov.sp.

Figs 33-38: Head from dorsal of: (33) Ichneumon paravafer nov.sp.; (34) I. paravulnerator nov.sp.; (35) I. pseudemancipatus nov.sp.; (36) I. rufolateralis nov.sp.; (37) I. sayanicus nov.sp.; (38) I. scopator nov.sp.

Figs 57-60: Scutellum and propodeum of: (57) Ichneumon paravulnerator nov.sp.; (58) I. pseudemancipatus nov.sp.; (59) I. rufolateralis nov.sp.; (60) I. sayanicus nov.sp.

Figs 77-80: Postpetiolus and 2nd tergite of: (77) Ichneumon pseudemancipatus nov.sp.; (78) I. rufolateralis nov.sp.; (79) I. sayanicus nov.sp.; (80) I. scopator nov.sp.