Hemiteles centumannorum, Schwarz, 2021

Schwarz, Martin, 2021, Description of a new species of Hemiteles (Ichneumonidae, Phygadeuontinae) from Europe, Linzer biologische Beiträge 53 (2), pp. 757-762 : 758-760

Hemiteles centumannorum nov.sp.

Holotype (♀): "A, Oberösterreich Walding NW Linz 5.2019, 48°20‘58‘‘N 14°09‘29‘‘E, J. Schwarz ", " Holotypus " , Holotypus ♀ Hemiteles centumannorum SCHWARZ des. Mart. Schwarz ‘21" (Biologiezentrum Linz). The holotype was collected inside a retirement home by the son of the author who worked there as civilian community servant.

Paratypes (3♀♀): Austria: Oberösterreich (= Upper Austria), Linz-Urfahr, KGA-Riesenhof (= Kleingartenanlage Riesenhof), Parzelle 60, 22-26.vi.2016, 48°19‘06‘‘N, 14°16‘13‘‘E, leg. Tiefenthaler (1♀) ; same data except 18-21.vii.2016 (1♀). Croatia: Split, Marjan, 6-20.vii.2017, leg. B. Kokan (1♀) (all Biologiezentrum Linz). The two paratypes from Austria were collected in an allotment garden area .

H. centumannorum nov.sp., which is morphologically most similar to H. similis (GMELIN) , can be separated from the other European species of Hemiteles by the combination of the following characters: third segment of antenna (without annellus) 3.5-3.8 times as long as wide, tegula white, fore wing entirely hyaline and with pterostigma dark brown, second metasomal tergite mainly orange (blackish laterally) and with distinct punctures. It keys to couplet 2 in the key to the females of Western Palaearctic Hemiteles ( SCHWARZ & SHAW 2000) but doesn’t agree entirely with either of the two alternatives.

Female ( Fig. 1 ): Antenna with 26-29 segments, third segment (without annellus) 3.5-3.8 times as long as wide and sixth segment 2.1-2.5 times as long as wide. Head coriaceous and matt, without distinct punctures. Inner margins of eye distinctly divergent ventrally ( Fig. 2 ). Central convexity of face rather distinct. Clypeus strongly convex and with a small depression in the centre apically. Mandible with upper tooth slightly longer than lower tooth. Malar space 1.0-1.1 times as long as basal width of mandible. Shortest distance between hind eye and ocellus (OOL) 0.8-0.9 times diameter of hind ocellus. Head behind the eyes strongly narrowed. Head as seen from above rather strongly transverse ( Fig. 3 ).

Lateral part of pronotum coriaceus and matt and with indistinct punctures dorsally, below with rugosity and lustrous. Mesoscutum coriaceous and matt, with very indistinct punctation; notaulus short and weak. Mesopleuron with fine transverse striation and anteriorly ventrally coriaceous and matt ( Fig. 4 ); speculum entirely or partly and often hind margin of mesopleuron below speculum smooth and lustrous. Speculum sometimes with weak striation anteriorly. Metapleuron with weak rugosity, weakly coriaceus and with indistinct punctures.

Propodeum ( Fig. 5 ) short, lustrous and with weak rugosity, all carinae distinct, except lateromedian longitudinal carina between anterior transverse carina and posterior transverse carina weak; area superomedia short, 0.5-0.7 times as long as wide; area petiolaris long, hardly concave.

Hind femur 3.8-4.1 times as long as wide. Fore wing with ramulus short, 1cu-a interstitial or postfurcal, areolet with 3rs-m usually indicated above and below.

Postpetiole with fine longitudinal striation. Second metasomal tergite with distinct and moderate punctures, distance between punctures larger than their diameter, without striation or rarely partly (especially anteriorly) with very fine striation; punctures larger than in any other known European species of Hemiteles ( Fig. 6 ). Fourth tergite with distinct, but slightly smaller punctures than on third tergite. Ovipositor sheath 0.5-0.6 times as long as hind tibia. Ovipositor without a distinct nodus, its tip without teeth ventrally ( Fig. 7 ).

Coloration: black. White are mandible (except teeth), palpi and tegula. Orange are scape ventrally, sometimes base of flagellum ventrally, clypeus ventrally (sometimes indistinct), often hind corner of pronotum, legs, sometimes postpetiole apically, second metasomal tergite (blackish laterally) and often third tergite basally (except laterally). Tibiae slightly lightened basally. Mandible with teeth brownish. Antenna mainly dark brown, but black above basally. Fore wing uniformly hyaline; pterostigma dark brown.

Body length: 3.4-4.8 mm.

Male unknown.

The species is named after the hundredth anniversary of the Entomological Working Group at the Biology Centre (Biologiezentrum) at Linz, founded on October 26, 1921.

Figures

Figs 1-7: Holotype (♀) of Hemiteles centumannorum nov.sp.; habitus laterally (1), head frontally (2), head dorsally (3), mesosoma laterally (4), propodeum (5), second tergite of metasoma (6), ovipositor (7).