Syzeuctus brevipunctatus, 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 : 1026-1027

Syzeuctus brevipunctatus nov.sp. (Figs 24, 27, 60, 103)

H o l o t y p e: (♀) " Kazakhstan, Kustanai, VIII 94, coll. V. Gurko" (Linz).

S t u d i e d m a t e r i a l: 1♀; Kazakhstan *.

D e s c r i p t i o n: ♀: Body length 11 mm. Antenna with 41 flagellomeres; 1 st flagellomere 5.0× longer than wide and 0.58× as long as eye; preapical flagellomere 1.25× longer than wide. Temple strongly and roundly narrowed behind eye, dorsally c. 0.3× as long as eye. OED 1.8× and OOD 2.3× ocellar diameter. Frons with rather scattered fine punctures, slightly swollen laterally and slightly impressed medially. Face densely punctate. Clypeus 2.0× wider than long, with scattered punctures, apical margin rounded. MI 0.5. Upper mandibular tooth larger than lower one. Genal carina reaching mandibular base.

Mesosoma 1.45× longer than high. Mesoscutum with scattered punctures anteriorly and almost smooth and strongly shining in posterior half. Scutellum with fine and very scattered punctures. Frontoventral edge of pronotum moderately curved; lateral pronotal groove smooth, partly striate; speculum punctate. Epicnemial carina low, carina on pleural part distinct, transversal part without carina. Propodeum with dense, partly rather scattered punctures; apical transversal carina strong and complete. Hind femur 5.7× longer than wide. Hind metatarsus 0.7× as long as hind femur. 2 nd hind tarsomere 1.6× longer than 3 rd one. Hind claw completely pectinate, slightly bent apically. Areolet stalked; 2 nd recurrent vein distal to its middle. Nervulus postfurcal by 1× its width. Hairs on basal cell shorter than their intervals. Hind wing with 9 distal hamuli.

1 st tergite 1.5× longer than wide, with scattered punctures laterally. 2 nd tergite 1.15× longer than wide, with rather coarse scattered punctures. 3 rd tergite 1.15× longer than wide, with fine scattered punctures. Spiracles of basal tergites slightly protruding. Ovipositor 1.15× longer than fore wing, 1.2× longer than metasoma and 2.4× longer than hind tibia.

Color: Black. Palps, apical half of clypeus and flagellum except black basal flagellomere reddish. Narrow stripe from frontal orbit to upper outer orbit yellow. Two paramedian stripes on mesoscutum, spot on tegula, side and apex of scutellum and apical margin of postscutellum yellow. Metasoma black; apical half of 1 st tergite, 2 nd tergite entirely and basal band of 3 rd tergite reddish. Legs black; frontal stripes on fore and mid femora, tibiae and tarsi, apical margin of hind trochantellus, apical 0.15 of hind femur, hind tibia except ochreous tip yellow; hind tarsus ochreous. Wings hyaline, without brown spot; pterostigma brown, cream-yellow proximally.

♂ and hosts unknown.

R e m a r k: This new taxon resembles S. vigil (TOSQUINET) , but is characterized by the reduced punctuation on mesoscutum and the slenderer metasoma. Due to the limited material, it is questionable if these differences indicate a separate taxon or an individual variation only.