Ichneumon mesonotator Riedel 2018, nov.sp.
Creators: name: Riedel, Matthias
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Ichneumon
Ichneumon mesonotator

description: Ichneumon mesonotator nov.sp. (figs 9, 30, 53, 72)   
M a t e r i a l e x a m i n e d Holotype: ♀ " 1-5 vii 2003, 2000 m, SW Tannu-Ola Mt reg., Sogly vill., SW Tuwa reg., S Siberia, leg. Vastchenko " (coll. Riedel)  
 D e s c r i p t i o n: Body length 14 mm. Antenna moderately lanceolate, with 40 flagellomeres; 1 st flagellomere 2.3x longer than wide, c.9 th flagellomere square, widest flagellomere c.0.70x as long as wide; preapical flagellomere 0.9x as long as wide. Temple moderately and almost linearly narrowed behind eye. OOD 1.6. Frons coarsely rugose-punctate. Face densely punctate, with fine granulation but shining. Clypeus with scattered punctures, smooth between punctures. Gena 1.1x as wide as eye, with rather dense punctures in ventral 1/2. Malar space 1.3x as long as width of mandibular base and 1.0x as long as 1 st flagellomere. Genal carina complete, not interrupted ventrally. Hypostomal carina narrow.   
 Mesosoma covered with brownish hairs. Mesoscutum densely punctate, smooth between punctures. Mesopleuron and metapleuron coarsely punctate, partly striate; coxal carina present. Scutellum slightly elevated, wider than long, with scattered punctures. Area superomedia slightly hexagonal, about as long as wide; costula absent. Area petiolaris bordered with irregular rugae in apical half. Mid and hind coxae with dense long pale brownish hairs; hind coxa with denser hairs almost forming an indistinct scopa apicoventrally. Hind femur 3.9x longer than wide, densely punctate. Hind tibia with c.4 denticular spurs apico-externally. Tarsomeres not enlarged, 3 rd mid tarsomere c.1.7x longer than wide.   
 Metasoma strongly oxypygous, hypopygium short. Postpetiolus strongly widened, median field with weak aciculation and some coarse punctures. 2 nd tergite 0.75x as long as wide. Gastrocoelus strongly impressed, with several ridges; thyridium large, transverse, c.1.4x wider than the interval. 2 nd and 3 rd tergites with fine dense punctures, both with longitudinal rugosity medially. Ovipositor sheath slightly extending behind metasomal apex.   
 Color: Black. Scapus, pedicel and flagellomeres 1-14 red, distal flagellomeres black. Mandible centrally red; narrow frontal orbit pale reddish. Collare and hind edge of pronotum, mesoscutum completely, tegula and subtegular ridge red. Scutellum ivory. Lateral field of postpetiolus red; 2 nd and 3 rd tergites yellowish-red; 5 th to 7 th tergites with large ivory spots. Coxae and trochanters black; fore coxa frontally and mid and hind coxae apico-dorsally with reddish spots. Legs otherwise red; hind tibia diffusely yellowish subbasally; infuscate in apical 1/10; 1 st to 3 rd hind tarsomeres red with black tips, 4 th and distal hind tarsomeres blackish. Wings with yellowish 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 runs to Ichneumon cynthiae KRIECHBAUMER in his key. It differs by the red coloration of basal antenna and mesoscutum and the dense pilosity of mid and hind coxae. From Ichneumon gracilicornis GRAVENHORST it can be differentiated by the red mesoscutum and shorter 1 st flagellomere.
description: Published as part of Riedel, Matthias, 2018, Contribution to the Siberian species of Ichneumon LINNAEUS (Hymenoptera, Ichneumonidae, Ichneumoninae), pp. 1509-1562 in Linzer biologische Beiträge 50 (2) on pages 1522-1523, DOI: 10.5281/zenodo.5274480