Stenaoplus harteni, Riedel, 2022

Riedel, Matthias, 2022, Contribution to the knowledge of the Ichneumoninae (Hymenoptera, Ichneumonidae) of Yemen, Linzer biologische Beiträge 54 (1), pp. 275-286 : 284-285

Stenaoplus harteni nov.sp. (figs 2, 8)

M a t e r i a l e x a m i n e d: Holotype:(♀) Yemen (5554) Ar Rujun 15.I.-9.IV.2001, Mal. trap, A. v. Harten, RMNH`02 [Leiden]. Paratype: (♀) Yemen (6007) Suq Bani Mansour, Mal. trap, 28.VIII.-14.XI.2001, A. v. Harten RMNH`02 [coll. RIEDEL].

D e s c r i p t i o n: ♀. Body length 6 mm. Flagellum slender, with 29 flagellomeres; 1 st flagellomere 3.8× and 2 nd flagellomere 3.0× longer than wide, combined length 0.75× eye length; flagellomeres behind middle slightly attenuated, widest flagellomeres almost square. Temple very strongly narrowed behind eye. Ocelli small, distance between lateral ocellus and compound eye 1.3× ocellar diameter. Face, gena and clypeus with fine punctures, almost smooth, central face finely granulate. Clypeus with medio-apical impression. Malar space 0.8× as long as width of mandibular base. Mandible with two teeth, lower tooth much smaller than upper tooth. Gena rather narrow, in profile 0.65-0.7× as wide as eye. Genal carina reaching hypostomal carina far from the mandibular base.

Mesosoma covered with short whitish setae. Notaulus impressed in frontal 0.3 of mesoscutum. Mesoscutum dull, with very fine superficial punctures and distinct granulation. Mesopleuron and metapleuron punctate and with fine longitudinal rugae. Scutellum moderately convex, about as long as wide, with scattered punctures, smooth, with strong and complete lateral carina. Propodeum with defined basal horizontal and apical descending parts. Coxae and femora with fine and superficial punctures. Hind coxa with scopa. Hind femur 4.4× longer than wide. Claws simple. Areolet almost pointed frontally; frontal distance between veins 2rs-m and 3rs-m 1× their width, vein 2m-cu reaching the middle of areolet. Vein 1cu-a interstitial. Nervellus of hind wing reclivous, intercepted in its apical 0.7.

Metasoma strongly oxypygous (fig. 2). Gastrocoelus indistinctly impressed. Thyridium very wide, 2.0× times wider than the interval between thyridia. 2 nd and 3 rd tergites densely granulate, with very superficial punctures, dull. 4 th and following tergites ± shining. Ovipositor sheath reaching far behind metasomal apex, about as long as 2 nd hind tarsomere (fig. 2).

Color: reddish-brown. Flagellum brownish, flagellomeres 7-13 with ivory bands. Face and clypeus reddish-brown, gena brownish. Wide facial orbit, frontal orbit, vertex and upper outer orbit ivory. 2 nd and 3 rd tergites dark reddish-brown; 4 th and 5 th tergites dark brown. 5 th tergite apically, and 6 th and 7 th tergites almost entirely ivory. Fore and mid legs reddish brown, hind leg brownish. Pterostigma yellowish.

♁ unknown.

R e m a r k: Due to its small size, this new species resembles the genus Parvaoplus HEINRICH , but the metasoma is clearly oxypygous, and the spiracle of propodeum elongate. In the key of the African members of Stenaoplus ( HEINRICH 1968: 1111-1115) this new species runs to couplet 13, but differs from Stenaoplus impressus HEINRICH by its much smaller size and the different ivory coloration.