Orthocentrus zaldivari, Humala, 2019

Humala, Andrei E., 2019, Mexican species of the genus Orthocentrus (Hymenoptera, Ichneumonidae: Orthocentrinae), Zootaxa 4709 (1), pp. 1-83 : 20-21

Orthocentrus zaldivari sp. nov.

( Figs 3 C , 9 I , 13 I , 16 I , 21 )

Material examined. Holotype ♀: México, Hidalgo, Huasca de Ocampo , rancho Sta. Elena, 2480 m, MT, 29.XI– 26.XII.2005, leg. Meléndez & Hdz. ( UNAM).

Paratypes: 1 ♀ with same data as for holotype ; 4 ♀ the same place, but MT 3, 25.XI–26.XII.2005, leg. A.Contreras et al.; 1 ♀ the same place, 25.I–23.II.2006, leg. A. Contreras et al. ( UNAM, UAT and ZISP) .

Description. Female. Fore wing length 2.8–3.1 mm.

Face medially 1.2 × wider than high; face protuberant, matt, finely horizontally strigose-pustulate; eyes with short and scarce setae, dorsal ridge of face inbetween antennal sockets with an inconspicuous median prominence, inner orbits slightly divergent ventrally; face profile somewhat convex, edge of clypeus rounded, antennal sockets on a high shelf (Hw/Fp = 5.1); subocular sulcus sharp, bent towards occiput; maxillary palp reaching fore coxa. In dorsal view, head posteriorly deeply concave, temples distinct, about 0.4 × eye width, posterior ocelli distant from eye by 1.1 × ocellar diameter, anterior ocellus separated from eye by 2.2 × ocellar diameter, ocellar-ocular grooves absent. Minimum distance between antennal sockets about 0.4 × diameter of socket; antenna thick, curled, with 26–27 (n=6) similar-sized subquadrate flagellomeres which not gradually shortening towards apex; basal flagellomere as long as apically wide and about 1/3 of the length of scape; scape parallel-sided.

Mesosoma smooth and polished except pronotum with short striations postero-ventrally, some microsculpture on mesoscutum and propodeum; mesoscutum with notauli anteriorly; in profile, scutellum not particularly high, metapleuron slightly convex; propodeum coriaceous, with posterior transverse carina clearly present between lateral longitudinal carinae, median longitudinal carinae complete, lateral longitudinal carinae sometimes indistinct anteriorly, spiracles small.

Legs all slightly flattened, broad; coxae polished, femora, tibiae and tarsi coriaceous-granulate; hind coxa as long as first tergite, hind femur 3.0 × as long as high, hind tibia 4.6 × as long as apically wide; tibiae with scattered, spine-like setae.

Wings not particularly narrow; fore wing with oblique areolet closed, longer than high; areolet comparatively large, second recurrent vein (2m-cu) meeting areolet at apical 0.7, vein Rs nearly straight, nervulus oblique, postfurcal; hind wing with nervellus intercepted at lower third.

First tergite elongate, 1.3 × as long as apically wide; coriaceous, with two median longitudinal carinae, with shallow transverse impressions originating at about middle of tergite, sloping posteriorly, not meeting centrally. Second tergite 0.9 × as long as apically wide; coriaceous strigose, posterior margin polished, with shallow transverse impressions originating at about middle of tergite, not meeting centrally; basal thyridia of second tergite oval/elongate, contrastingly coloured, second thyridia round, same colour as surrounding cuticle. Third tergite coriaceous basally with basal thyridia, polished apically. Remaining tergites smooth, polished. Ovipositor thin, nearly straight, without dorsal notch; ovipositor sheath rounded, with sparse setae as long as sheath width.

Body largely setose except pronotum, mesopleuron and metapleuron; setae scattered on propodeum, basal tergites, and posterior sides of coxae.

Dark brown except upper face, malar space, antenna ventrally, propleuron ventrally, pronotum ventrally and in dorso-posterior corners, subalar prominence, mesepimeron, basal thyridia, hind coxa and metasoma from third tergite reddish-brown; legs except hind coxae yellow; mouthparts, tegula and sternites creamy.

Male. Unknown.

Biology. Hosts unknown. All specimens were collected at high-altitude site in state Hidalgo.

Distribution. Mexico (Hidalgo).

Etymology. Named after Dr Alejandro Zaldívar Riveron—curator of UNAM Ichneumonidae collections.

Comments. Compared with the other species that have antennal sockets on a high protruding shelf, thick, curled antennae, eyes setose, and face polished and densely punctate, the fore wing with large transverse areolet, distinctly wider than high, occiput deeply concave, face and frontal orbits fuscous, unlike in O. fuscipes and O. robustus ; from O. hispidus it differs in the scarce eyes setae.

Figures

FIGURE 3. Lateral views: Orthocentrus shieldsi (in part) and O. montanus (in part) species-groups.A: ocampo, B: vulgaris, C: zaldivari, D: khalaimi, E: malaris, F: montanus, Scale 1.0 mm.

FIGURE 9. Faces: Orthocentrus shieldsi and O. montanus (in part) species-groups. A: areolatus, B: dorsofuscus, C: fuscipes, D: kasparyani, E: lostuxtlasi, F: microphthalmus, G: ocampo, H: vulgaris, I: zaldivari, J: khalaimi, K: malaris, L: montanus. Scale 0.2 mm.

FIGURE 13. Heads in dorsal view: Orthocentrus shieldsi and O. montanus species-groups. A: areolatus, B: dorsofuscus, C: fuscipes, D: kasparyani, E: lostuxtlasi, F: microphthalmus, G: ocampo, H: vulgaris, I: zaldivari, J: khalaimi, K: malaris, L: montanus, M: montezuma, N: sierrae, O: tlaxcalensis. Scale 0.2 mm.

FIGURE 16. Basal tergites: Orthocentrus shieldsi and O. montanus species-groups. A: areolatus, B: dorsofuscus, C: fuscipes, D: kasparyani, E: lostuxtlasi, F: microphthalmus, G: ocampo, H: vulgaris, I: zaldivari, J: khalaimi, K: malaris, L: montanus, M: montezuma, N: sierrae, O: tlaxcalensis. Scale 0.2 mm.

FIGURE 21. Distribution map of Orthocentrus in Mexico. O. kasparyani, O. pentagonum, O. vulgaris, O. zaldivari