Gnathochorisis khalaimi Humala

Humala, Andrei E., 2017, New species of the genus Gnathochorisis Förster (Hymenoptera: Ichneumonidae: Orthocentrinae) from the Neotropical Region, Zootaxa 4250 (3), pp. 201-218: 212-213

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Gnathochorisis khalaimi Humala

sp. nov.

Gnathochorisis khalaimi Humala  , sp. nov.

Figs 3View FIGURE 3 A, 4E, 5E, 6E.

Description. Female (holotype). Body length 3.8 mm. Fore wing length 3.5 mm.

Head 1.3 × as wide as high; face polished, at level of antennal fossae 0.45 × as wide as head ( Fig. 4View FIGURE 4 E). Clypeus weakly separated from face, edge of clypeus truncate, malar space 1.3 × as long as mandible basal width, with shallow microsculptured subocular sulcus; maxillary palp reaching slightly beyond fore coxa. In dorsal view, head concave posteriorly, occipital carina complete; temple distinct, 0.45 × as long as eye length, posterior ocellus separated from eye by 1.1 × ocellar diameter, posterior ocelli line 0.8 × ocellar diameter ( Fig. 5View FIGURE 5 E). Antenna approximately as long as fore wing, with 20 flagellomeres; basal flagellomere 6.7 × as long as wide; subapical flagellomeres approximately 1.5 × as long as wide.

Mesosoma 1.3 × as long as high. Mesoscutum convex, matt with dense setae; epomia present; notauli indicated anteriorly; epicnemial carina complete; scutellum in profile somewhat high, with lateral carinae almost to apex; anterior transverse carina of propodeum strongly raised; area superomedia almost as long as wide, costula present; rounded apophyses of propodeum resulting from crossing lateral longitudinal and posterior transverse carinae well developed ( Fig. 6View FIGURE 6 E). Most of propodeum polished with scarce setae. Metapleuron polished.

Fore wing with areolet closed, slightly longer than high, areolet comparatively small, petiolate, with 3rs-m longer than 2rs-m; vein cu-a inclivous, opposite Rs+M; hind wing with nervellus intercepted at about lower 0.25, Cu1 present.

Hind legs stout, coxa and femur polished, tibia and tarsus coriaceous; hind femur inflated, spindle-like, 3.4 × as long as high, approximately as wide as hind coxa. Hind tibia 5.0 × as long as maximum width, tibia with spinelike setae; basitarsus 0.35 × as long as hind tibia.

First metasomal segment slender, moderately arched, 2.3 × as long as apically wide, coriaceous; spiracles protruding and directed backwards ( Fig. 6View FIGURE 6 E). Dorsal longitudinal carinae well developed. Spiracle at 0.5, sternite at 0.6 of first tergite length. Second tergite 0.7 × as long as posteriorly wide, coriaceous, smooth apically, with small thyridium in basolateral corner. Third tergite with weak microsculpture, more conspicuous basally; remaining tergites of metasoma polished; metasoma flattened laterally from third tergite. Ovipositor slightly upcurved, about as long as first metasomal segment, with subapical dorsal notch sharply delimited.

Fuscous. Head mostly yellowish-rufous except darkened occiput and blackish interocellar area; clypeus, mandibles, palps, tegulae, base of wings, fore and mid coxae and trochanters pale. Flagellum dark brown, slightly paler basally. Mesoscutum rufous with three fuscous blurred patches on lateral lobes and antero-medially; scutellum rufous; pronotum, propleuron, mesepimeron, lower mesopleuron, and mesosternum yellowish-rufous. Legs mostly light brown, hind femur slightly darkened apically, hind tibia basally and apically. Metasoma fuscous; second tergite in apical 0.2 and very base of tergite 3, thyridium and pair of small round lateral spots in apical half of second tergite light brown. Wings hyaline.

Male. Unknown.

Comparison. Similar to G. rufa  sp. nov. in having strong apophyses on the propodeum, but differs from this species by the wider face, fuscous upper mesopleuron, propodeum and metapleuron, and spindle-like inflated hind femur.

Material examined. Holotype female ( UNAM), México, San Luis Potosí, N Xilitla, Las Pozas, 570 m, N 21°23.684', W 98°59.566', 19.XI.2011, leg. A.I. Khalaim;GoogleMaps 

Paratypes: 1 female ( ZISP), México, Veracruz, SW of Xalapa , park near Institute de Ecologia, 1260 m, N 19°30.768', W 96°56.349', 12–14.IV.2014, leg. A.I. KhalaimGoogleMaps  ; 1 female ( BMNH), México, Veracruz, Xalapa   , USBI, T2 H5, 19°30ʹ N, 96°55ʹ W, 1279 m, Malaise trap, 8–18.VI.2015, leg. M. López-Ortega; 1 female ( UAT), México, Oaxaca, Municipio Comaltepec , La Esperanza, 1600 m, N 17.62601°, W 96.36950°, 2-12.VIII.2008, MT, Bosque Lluvioso de Montaña. leg. A. López-GarciaGoogleMaps  .

Distribution. Mexico (Oaxaca, San Luis Potosí, Veracruz) ( Fig. 1View FIGURE 1).

Etymology. I am pleased to name this species after my colleague Dr Andrey I. Khalaim ( ZISP, UAT).


Universidad Nacional Autonoma de Mexico


Zoological Institute, Russian Academy of Sciences


Universidad Aut�noma de Tamaulipas