Syzeuctus flagellator, 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 : 1037-1039

publication ID	https://doi.org/ 10.5281/zenodo.5038739
persistent identifier	https://treatment.plazi.org/id/03F18F1B-3836-FFEC-A5E4-FAF3FF6958D4
treatment provided by	Carolina
scientific name	Syzeuctus flagellator
status	sp. nov.

Treatment

Syzeuctus flagellator nov.sp. ( Figs 2 View Figs 1-6 , 13 View Figs 12-15 , 31, 54, 68, 111)

H o l o t y p e: (♀) " 19.VII.1975 Chantemerle/F; E 063600 N 445420" (Munich).

P a r a t y p e s: (♀) labeled as on the holotype (Munich); (♀) " 21.VII.1975 Chantemerle/F; E 063600 N 445420" (Munich); (♀ and ♂) " Wallis, Berisal , 28 VI 1919 Steck " (Basel); (♀ and ♂) "17. VI.89 Berisal " (Berlin); (♀) "20. VI.89, Simplon " (Berlin); (♀) "Sierra Schweiz " ( Berlin ); (♀) "18/132; Frst ; petiolaris Grv. " (Berlin); (♀) "Berlin Thurau" ( Berlin ); (♂) " Usbekistan, Vil. Samarkand , Gerafschan-Geb., Aman-Kuten-Pass, 39°17´54´´N / 66°54´20´´ E /GPS, 1700 m, 07.- 08.06.1997, H. & R. Rausch leg. (97/17)" (Linz) GoogleMaps .

S t u d i e d m a t e r i a l: 10♀♀, 3♂♂; France *, Germany *, Switzerland *, Uzbekistan *.

D e s c r i p t i o n: ♀: Body length 7.5-9.5 mm. Antenna with 31-33 flagellomeres; 1 st flagellomere 4.2-4.7× longer than wide and 0.63-0.65× as long as eye; preapical flagellomere almost square or slightly longer than wide. Head covered with rather long hairs. Temple strongly and roundly narrowed behind eye, 0.35-0.55× as wide as eye. OED 1.6-1.7× and OOL 2.1× ocellar diameter. Frons with slightly protruding sides, sometimes with ± distinct sublateral tubercles, centrally impressed, with scattered punctures, smooth ventrally. Face protruding centrally. Clypeus c. 1.6-1.7× wider than long, with rounded apex. MI 0.8-0.9. Gena partly granulate and matte. Genal carina reaching mandibular base.

Mesosoma 1.4× longer than high. Pronotum punctate, lateral pronotal groove ± rugose ventrally. Epicnemial carina moderately elevated, with ± distinct lamella or tooth at transversal part. Propodeum with apical transversal carina complete or shortly obsolete medially. Hind femur 4.8-5.1× longer than wide; hind tibia with numerous external spines. Hind metatarsus 0.68-0.70× as long as hind femur. 2 nd hind tarsomere 1.4× 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 as long as their intervals. Hind wing with 9 distal hamuli.

1 st tergite 1.4-1.6× longer than wide, with very scattered fine setiferous punctures laterally. 2 nd tergite 1.15-1.2× wider than long; with scattered or rather dense punctures. 3 rd tergite 1.1-1.2× wider than long, with dense punctures. Spiracles of 1 st to 3 rd tergites protruding. Ovipositor 1.2-1.25× longer than fore wing, 1.45-1.7× longer than metasoma and 2.9-3.0× 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 completely black. 2 nd and 3 rd tergites red, sometimes 4 th tergite reddish basally. Coxae and trochanters black; legs otherwise reddish-yellow; hind tibia in apical 0.5-0.7 and hind tarsus black. Wings

without dark spots, pterostigma ochreous or brownish. ♂: Body length 9.5-11 mm. Antenna with 33-34 flagellomeres; 1st flagellomere 4.7-5.0×

longer than wide and 0.65-0.74× as long as eye; preapical flagellomere 1.4× longer than wide. Head covered with rather long erected hairs. Temple strongly and roundly narrowed behind eye. OED 1.4-1.7× and OOD 2.0× ocellar diameter. Frons punctate, usually with two blunt sublateral crests. Clypeus 1.6-1.9× wider than long. MI 0.9-1.0. Lateral pronotal groove rugose and punctate. Epicnemial carina low, with distinct lamella or tooth at transversal part. Apical transversal carina of propodeum complete. Hind femur 4.5-5.2× longer than wide. Hind metatarsus 0.65-0.75× as long as hind femur. 2 nd hind tarsomere 1.4× longer than 3 rd one. Hind claw with basal or complete pectination. Areolet stalked, 2 nd recurrent vein in or distal to its middle. Nervulus postfurcal by 1× its width. Hairs on basal cell as long as their intervals. Hind wing with 9-10 distal hamuli.

1 st tergite 1.5-1.75× longer than wide, with rather dense punctures laterally. 2 nd tergite 1.1-1.2× wider than long, with dense punctures. 3 rd tergite 1.05× wider than long, with dense but rather superficial punctures.

Color: Black. Antenna reddish, brown dorsally. Palps, mandible except teeth, clypeus, face, malar space, inner and outer orbits, scape and pedicel ventrally, tegula, fore and mid coxae and trochanters frontally, and all trochantelli yellow. Legs except coxae and trochanters reddish; fore and mid legs yellowish frontally, hind tibia yellow, infuscate in apical 0.3-0.5. Hind tarsus blackish or (in ♂ from Uzbekistan) yellowish with black tips.

2 nd and 3 rd tergites red, 1 st tergite narrowly at apex and 4 th tergite basally red. Wings hyaline, pterostigma brownish.

Hosts unknown.

R e m a r k: This new taxon is closely related to S. caper (SEYRIG) , but differs by: Ovipositor longer, frons moderately swollen laterally or with sublateral tubercles, but without distinct horns, red color of metasoma less extended; in ♂♂ face completely yellow.