First record of the genus Gnathochorisis Förster, 1869 (Hymenoptera: Ichneumonidae: Orthocentrinae) from the Afrotropical region, with descriptions of two new species from Kenya Author Varga, Oleksandr text Zootaxa 2021 2021-10-15 5052 3 441 446 journal article 4040 10.11646/zootaxa.5052.3.9 b3669508-765e-44a4-99b4-fefe16289429 1175-5326 5572288 BD7BBBB0-A939-49E2-B2C5-FA7D13B51801 Gnathochorisis malavensis Varga , sp. n. urn:lsid:zoobank.org:act: 69E112C7-0387-491F-9C9B-0961CEBB8F9E ( Fig. 1 ) Material examined. Holotype : female, KENYA , Western Province , Malava Forest , 1619 m , 0.46372° N , 34.85727° E , Malaise trap in indigenous forest, 4–18.v.2017 , leg. R . Copeland (Deposited in: ICIPE ) . Paratypes : female, same locality as holotype, 1–15.vi.2017 (Deposited in: SIZK ); female, Western Province , Kakamega Forest , nr. KFS HDQTRs, 1620 m , 0.23742° N , 34.86607° E Malaise trap in indigenous forest, 19.iv–2.v.2017 , leg. R . Copeland (Deposited in: ICIPE ). Diagnosis. Gnathochorisis malavensis sp. n. is characterized by the combination of the following characters: fore wing with areolet closed (vein 3 rs-m present), face, meso- and metapleuron, and second metasomal tergite black, second tergite distinctly granulate except apex, third tergite smooth, unsculptured, propodeum smooth, unsculptured. Description. Holotype . Female ( Fig. 1 ). Body length approximately 2.7 mm , fore wing 2.0 mm. Head ( Fig. 1B ) generally smooth and sparsely pubescent. Antenna with 18 flagellomeres, first flagellomere 1.3 × the length of the second, flagellomeres; maximum diameter of lateral ocellus 0.8 times × the length of the ocellar-ocular distance; inner margins of eyes diverging downwards; face about 0.7 × as long as wide, smooth, weakly granulate centrally, covered with long setae; clypeus moderately convex, about 0.4 × as long as wide, distinctly separated from face, notched apically, smooth, covered with long setae; malar space about as long as the basal width of mandible; subocular sulcus distinct; mandible narrow, weakly twisted, both teeth visible, upper tooth longer than lower tooth; occipital carina largely absent dorsally; temples strongly narrowed behind eyes, short. Mesosoma ( Fig. 1C, D ). Propleuron smooth, sparsely pubescent; pronotum smooth, epomia absent; mesoscutum weakly transverse, with notauli absent, densely pubescent; scutellum convex, smooth, sparsely pubescent, with lateral carina present basally; mesopleuron smooth, densely pubescent ventrally, epicnemial carina present on lower half of mesopleuron; metapleuron smooth, submetapleural carina strong, pleural carina present and complete; propodeum ( Fig. 1C ) smooth and sparsely pubescent, with well-developed carinae, area basalis weakly defined apically, area superomedia fused with area apicalis. Legs stout, hind femur 3.2 × longer than wide; fifth tarsomere 1.4 × as long as third tarsomere. Fore wing with areolet closed (vein 3 rs-m present); vein cu-a opposite to Rs&M . Hind wing nervellus weakly inclivous, with distance between first abscissa of Cu and M weakly longer than vein cu-a . Metasoma ( Fig. 1E ) generally smooth and impunctate. First tergite 2.5 × as long as apical width, granulate, dorsolateral carina distinct on basal 0.9 of the tergite, but weak, median longitudinal carina distinct and strong, reaching the apex of the tergite, glymma absent; second tergite 0.7 × as long as apical width, distinctly granulate except apex; third tergite smooth and unsculptured; ovipositor ( Fig. 1D ) up-curved, the length from tip of hypopygium about 0.9 × length of hind tibia. Colour . Body black. Scape, pedicel, first flagellomere, mandible (except apex), upper hind corner and lower angle of pronotum narrowly orange; legs generally yellowish-orange, except hind coxa partly, hind femur apically, hind tibia largely and tarsus entirely brown; pterostigma and veins brown, ovipositor orange. Male . Unknown. FIGURE 1. Gnathochorisis malavensis sp. n. : A, C) holotype female; B, D–E) paratype female; A) lateral view of habitus; B) frontal view of head; C) dorsal view of head and mesoscutum; D) dorsal view of propodeum; E) dorsal view of metasomal tergites 1–3. Scale bar = 0.1 mm. Variability. Second metasomal tergite vary from distinctly transverse to subquadrate. Hind legs in one paratype largely brown: coxa, femur and tarsus entirely and tibia except base. Distribution. Currently known only from Kenya . Etymology. This species is named after the type locality, Malava forest.