Gnathochorisis jasoni, Ranjith & Humala & Priyadarsanan, 2022

Ranjith, A. P., Humala, Andrei E. & Priyadarsanan, Dharma Rajan, 2022, First records of two orthocentrine genera (Hymenoptera: Ichneumonidae) from India with description of two new species, Zootaxa 5155 (3), pp. 414-422 : 415-418

publication ID	https://doi.org/ 10.11646/zootaxa.5155.3.6
publication LSID	lsid:zoobank.org:pub:22C38A1E-C87D-435A-84B7-24A7A16492D4
DOI	https://doi.org/10.5281/zenodo.6778760
persistent identifier	https://treatment.plazi.org/id/D0243D9E-3653-439B-AAD8-A8EB0E5F39E2
taxon LSID	lsid:zoobank.org:act:D0243D9E-3653-439B-AAD8-A8EB0E5F39E2
treatment provided by	Plazi
scientific name	Gnathochorisis jasoni
status	sp. nov.

Treatment

Gnathochorisis jasoni sp. nov.

( Figs 1–2 View FIGURE 1 View FIGURE 2 )

urn:lsid:zoobank.org:act:D0243D9E-3653-439B-AAD8-A8EB0E5F39E2

Material examined. Holotype, female, INDIA: Karnataka, Chamarajanagar, Biligiri Rangaswamy Temple ( BRT) Tiger Reserve , Parasakatte , 12.0141°N, 77.0655°E, 800 m. a.s.l., scrub jungle, Malaise trap, 21.vi–18.vii.2006, coll. D. R. Priyadarsanan GoogleMaps . Paratypes, 3 females, with same data as for holotype, except 12.0034°N, 77.0752°E, 980 m GoogleMaps .a.s.l., dry deciduous forest, Malaise trap, 16–31.viii.2005, coll. D. R. Priyadarsanan .

Description. Female. Body length 4.3 mm; fore wing length 3.2 mm.

Head. Head width 1.2 × its height in anterior view ( Fig. 1B View FIGURE 1 ). Face width at level of antennal sockets 1.8 × its height, 0.5 × head width, subpolished and closely punctate, transversely striate medially in lower part, sparsely setose ( Fig. 1B View FIGURE 1 ). Frons, vertex and occiput polished, sparsely setose ( Fig. 1C View FIGURE 1 ). Occiput somewhat depressed ( Fig. 1C View FIGURE 1 ). Occipital carina present ( Fig. 1C View FIGURE 1 ). Eyes large, convex, without setae, inner orbits subparallel, slightly diverge downward ( Fig. 1B View FIGURE 1 ). Clypeus width 2.0 × its height, weakly separated from face, posterior margin of clypeus very weakly convex ( Fig. 1B View FIGURE 1 ). Anterior tentorial pits distinct ( Fig. 1B View FIGURE 1 ). Malar space 1.6 × as long as basal width of mandible ( Fig. 1B View FIGURE 1 ). Subocular sulcus distinct, sharp and straight ( Fig. 1B View FIGURE 1 ). Mandible bidentate, strongly tapered, lower tooth small. Antenna shorter than body, with 21 slender flagellomeres, all flagellomeres longer than wide ( Fig. 1A View FIGURE 1 ). Scape about twice as long as wide. First flagellomere 4.3 × as long as wide apically, second flagellomere 3.5 × as long as wide apically. Ocelli of moderate size, ocular-ocellar line as long as and postocellar line 1.2 × as long as maximum diameter of lateral ocellus ( Fig. 1C View FIGURE 1 ). Temple moderately short, 0.4 × as long as the width of compound eye ( Fig. 1C View FIGURE 1 ).

Mesosoma. Mesosoma 1.3 × as long as maximum height, polished. Epomia strong, well developed ( Fig. 1D View FIGURE 1 ). Mesoscutum (moderately) subpolished with dense light setae ( Fig. 1E View FIGURE 1 ). Notauli coarsely and irregularly pitted, posteriorly widened, meeting in the center of mesoscutum ( Fig. 1E View FIGURE 1 ). Scutellum not particularly high, smooth, with lateral carinae anteriorly ( Fig. 1E View FIGURE 1 ). Epicnemial carina complete, ending at upper corner of mesopleuron ( Fig. 1D View FIGURE 1 ). Sternaulus short but distinct ( Fig. 1D View FIGURE 1 ). Mesopleuron, metapleuron and propodeum polished, with sparse setae ( Figs 1D, F View FIGURE 1 ). Propodeal carination complete ( Fig. 1F View FIGURE 1 ). Area superomedia parallel-sided, 1.8 × as wide as long. Short sections of posterior transverse carina connecting with lateral longitudinal carinae form small rounded apophyses ( Fig. 1F View FIGURE 1 ). Propodeal spiracle large, round, joined by short carina with pleural carina. Fore wing without areolet ( Fig. 2C View FIGURE 2 ). Pterostigma 2.8 × as long as wide. Vein 2m-cu with two bullae ( Fig. 2C View FIGURE 2 ). Vein 1cu-a oblique, almost interstitial of vein M&RS ( Fig. 2C View FIGURE 2 ). Hind wing with nervellus (CU+cu-a) intercepted in lower 0.3, second abscissa of CU present, short ( Fig. 2C View FIGURE 2 ). Hind coxa smooth ( Fig. 1A View FIGURE 1 ). Hind femur 3.6 × as long as maximum width. Hind tibia 3.2 × as long as wide. Tibial spurs slender, claws long and thick, strongly bent.

Metasoma. First metasomal segment 1.7 × as long as maximum width posteriorly, subpolished, postpetiole longitudinally striate with distinct dorsal carinae reaching posterior margin ( Fig. 2B View FIGURE 2 ); dorso-lateral carina just above spiracle ( Fig. 2A View FIGURE 2 ). Sternite and tergite fused, glymma absent, spiracle situated at basal 0.5 length of T1, apex of first sternite at 0.5 of segment ( Fig. 2A View FIGURE 2 ). Second metasomal tergite 0.8 × as long as maximum width posteriorly, longitudinally striate, with small thyridium, smooth and polished in posterior 0.25 ( Fig. 2B View FIGURE 2 ). Remaining tergites smooth, sparsely setose ( Fig. 2B View FIGURE 2 ). Ovipositor upcurved with dorsal subapical notch ( Fig. 2A View FIGURE 2 ). Ovipositor sheath 1.3 × as long as first tergite and as long as hind tibia.

Colour. Body black except antennae, clypeus, mandibles, maxillary and labial palps, tegula, legs except apex of hind tibiae, metasomal sternites and ovipositor, which are yellow; pterostigma, apex of hind tibiae, second metasomal tergite posteriorly, metasomal tergites 3–6, and ovipositor sheath brown.

Male. Unknown.

Biology. Unknown.

Distribution. India (Karnataka).

Etymology. We dedicate the species to the extraordinary, very calm dog, Jason a regular visitor of Insect Lab at ATREE.

Comparative diagnosis. Gnathochorisis jasoni sp. nov. is close to G. leleji Humala. Apart from the differences included in the key the new species can also be distinguished by the following characters: scape 2.0 × as long as wide (vs 2.3 × as long as wide in G. leleji ), head 2.2 × as wide as long (vs 3.0 × in G. leleji ), ovipositor sheath 1.3 × as long as first tergite (vs 0.8 × in G. leleji ).