Syzeuctus brunneomaculatus, 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 : 1027-1028

Syzeuctus brunneomaculatus nov.sp. (Fig. 10)

H o l o t y p e: (♀) " Iran, Kerman prov., 25 km E Jeroft (Mijan), 28°42´N 57°57´E, 1650 m, J. Halada, 27.5.2014 " (Linz).

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

D e s c r i p t i o n: ♀: Body length 11 mm. Antenna with 38 flagellomeres; 1 st flagellomere 3.8× longer than wide and 0.51× as long as eye, preapical flagellomere 1.1× longer than wide. Temple parallel behind eye and slightly narrowed apically, 0.4× as wide as eye. OED 1.7× and OOD 1.5× ocellar diameter. Frons with scattered punctures, slightly swollen laterally, with weak median impression. Face densely punctate, with parallel sides. Clypeus 2.0× wider than long, with scattered punctures, apical margin rounded. Mandible with wide ventral lamella. MI 0.75. Genal carina reaching mandibular base.

Mesosoma 1.54× longer than high. Frontoventral edge of pronotum strongly curved. Lateral pronotal groove smooth. Epicnemial carina low, without lamella on transversal section opposite to ventral edge of pronotum. Mesoscutum with scattered punctures in apical half; scutellum with scattered punctures; mesopleuron including speculum and metapleuron densely punctate. Propodeum with mainly dense punctures (but ± scattered in central part), apical transversal carina complete. Hind femur 5.3× longer than wide. Hind metatarsus 0.68× as long as hind femur. 2 nd hind tarsomere 1.35× as long as 3 rd one. Hind claw densely pectinate and moderately curved apically. Areolet stalked; 2 nd recurrent vein slightly distal to its middle. Nervulus postfurcal by 1× its width. Hairs on basal cell slightly shorter than their intervals. Hind wing with 9 distal hamuli.

1 st tergite 1.6× longer than wide, with scattered punctures. 2 nd tergite 1.1× longer than wide, with scattered punctures. 3 rd tergite 1.0× as long as wide, with rather dense punctures. Ovipositor 1.2× longer than fore wing, 1.7× longer than metasoma and 2.9× longer than hind tibia.

Color: Black. Flagellum black, reddish-brown in apical half. Head yellow. Teeth of mandible, clypeal groove, narrow median stripe on face, surrounds of ocelli and occiput black. Scape and pedicel yellowish ventrally. Mesosoma yellow; three stripes on mesoscutum, scuto-scutellar groove, stripes on mesopleuron, mesosternum and metapleuron, and two paramedian stripes on propodeum black. 1 st to 3 rd tergites red, the following more brownish. 1 st tergite with basolateral yellow spots and apical yellow band. 2 nd and 3 rd tergites with yellow apical bands. Fore and mid legs yellow, with reddish-brown caudal stripes; hind coxa yellow dorsally and reddish ventrally, hind trochanter red and black; hind trochantellus yellow; hind femur reddish-brown dorsally and yellow ventrally; hind tibia reddish internally and yellow externally; hind tarsus black in apical half. Fore wing with apical brown spot; pterostigma brown, yellow proximally.

♂ and hosts unknown.

R e m a r k: This new species with complete apical transversal carina of propodeum is closely related to S. maculipennis (COSTA) and is characterized by parallel temples behind eyes, scattered and short hairs on basal cell of fore wing and reduced punctuation on mesoscutum, scutellum and median propodeum.