Syzeuctus kazakhstanicus, Riedel, 2021

Riedel, Matthias, 2021, The genus Syzeuctus FÖRSTER in the Western Palaearctic region and Central Asia (Hymenoptera, Ichneumonidae, Banchinae), with descriptions of 17 new species, Linzer biologische Beiträge 52 (2), pp. 1013-1098 : 1052-1053

Syzeuctus kazakhstanicus nov.sp. ( Figs 52 , 98, 122)

H o l o t y p e: (♀) " Kazakhstan 20 km SE Aksay env., 16.- 19.6.1992, leg. J. Halada" (Linz).

P a r a t y p e s: (2♀♀) labeled as on the holotype (Linz); (♀) " Kazakhstan or., River Ili , 14.6.93, Aidarli, lg. K. Denes " (Linz); (2♀♀ ♂) " Kazakhstan ridge Malaysari 144 km N Alma-Ata, 21.6.92, lg. Jirousek" (Linz, coll. Riedel); (2♂♂) " Kazakhstan Lepsi , 78,8-46,4, 19- 20.6.1995, M. Mucka lgt." (Linz); (♂) " Kazakhstan or., Lepsi , 46,4N 78,8E, 19.- 20.6.1995, leg. Jiri Halada " (Linz) .

S t u d i e d m a t e r i a l: 6♀♀, 4♂♂; Kazakhstan *.

D e s c r i p t i o n: ♀: Body length 9.5-11 mm. Antenna with 42-43 flagellomeres; 1 st

flagellomere 4.3× longer than wide and 0.53× as long as eye. Temple strongly and

roundly narrowed behind eye, width 0.35× eye width. OED 1.6-1.7× ocellar diameter.

Frons with slightly protruding sides, centrally impressed, with ± scattered punctures, and

sometimes smooth ventrally. Face protruding centrally. Clypeus 1.6× wider than long,

with rounded apex. MI 0.6. Genal carina reaching mandibular base.

Pronotum punctate, lateral pronotal groove ± smooth ventrally. Epicnemial carina moderately elevated, with ± distinct lamella at transversal part. Propodeum with dense and partly rugose punctuation; apical transversal carina complete. Hind femur 4.5-4.8× longer than wide. 2 nd hind tarsomere 1.5× longer than 3 rd one. Hind claw with long teeth in basal 2/3, moderately curved apically. Areolet stalked; 2 nd recurrent vein distal to its middle. Nervulus postfurcal by 2× its width. Hairs on basal cell about as long as their intervals.

1 st tergite 1.8-1.85× longer than wide, with very scattered fine setiferous punctures laterally. 2 nd tergite 1.0-1.05× longer than wide; with rather dense punctures. 3 rd tergite 1.0-1.15× wider than long, with dense punctures. Spiracles of 1 st to 3 rd tergites ± protruding. Ovipositor 1.1-1.2× longer than fore wing, 1.45-1.7× longer than metasoma and 2.4× longer than hind tibia.

Color: Black. Clypeus in apical 1/3-2/3, narrow inner and outer orbits yellow. Mesosoma black. 1 st tergite black basally, red apically, sometimes entirely red. 2 nd to 5 th /6 th tergites red. Coxae and trochanters black; legs otherwise reddish-yellow; hind tibia in apical 0.5- 0.7 and hind tarsus black. Wings slightly infuscate, without dark spots, pterostigma brownish.

♂: Body length 10.5-11 mm. Antenna with 42-45 flagellomeres; 1 st flagellomere 5.3× longer than wide and 0.67× as long as eye. OED 1.6× ocellar diameter. Clypeus 1.6× wider than long. MI 0.65. Hind femur 4.7× longer than wide. Nervulus postfurcal by 3× its width. 1 st tergite 2.0× longer than wide, densely punctate. 2 nd tergite 1.1× longer than wide, with dense coarse punctures. 3 rd tergite 1.1× wider than long, with dense punctures.

Color: Black. Mandible except teeth, clypeus and face largely, spot on gena, inner and outer orbits, tegula, sometimes spot on propleuron, sometimes apical spot on scutellum, fore and mid coxae and trochanters frontally, fore and mid legs frontally yellow. Hind coxa and trochanter black or with reddish suffusion. Hind femur red or black; hind tibia yellow at basal 3/10, red apically; hind tarsus brownish. 1 st tergite black, red apically; 2 nd to 6 th tergites reddish. Wings without brown spots; pterostigma brown.

Hosts unknown.

R e m a r k: This new species resembles Syzeuctus petiolaris (GRAVENHORST) . It differs from S. petiolaris by the red apical tergites, rugose-punctate propodeum and slightly longer ovipositor in ♀.

Figures

Figs 49-52: Basal tergites of ♀♀ from dorsal: (49) Syzeuctus tigris SEYRIG, (50) S. vigil (TOSQUINET) HT, (51) S. ibericus nov.sp. HT, (52) S. kazakhstanicus nov.sp. PT. Figs 53-55: Basal tergites of ♂♂: (53) Syzeuctus flavator nov.sp. HT, (54) S. flagellator nov.sp., (55) S. dusmeti SEYRIG with enlarged tergal spiracles, from lateral. Fig. 56: Hind tarsomere of Syzeuctus crassitarsis TELENGA ♀.