Orthocentrus lopezi, Humala, 2019

Humala, Andrei E., 2019, Mexican species of the genus Orthocentrus (Hymenoptera, Ichneumonidae: Orthocentrinae), Zootaxa 4709 (1), pp. 1-83 : 26-27

Orthocentrus lopezi sp. nov.

( Figs 5 A , 10 G , 14 D , 17 D , 27 )

Material examined. Holotype ♀: México, Oaxaca, Municipio Comaltepec, La Esperanza, 1600 m, N 17.62661°, W 96.36950°, MT, Bosque Lluvioso de Montaña , 1–10.VII.2008, leg. A. López-Garcia ( UNAM).

Paratypes: 1 ♀ —same data as for holotype ; 2 ♀ —same data as for preceding, but dates 10–20.VI.2008, 2– 12.VIII.2008 ; 1 ♀ — Veracruz, Xalapa , 1279 m, N 19°30′, W 96°55′, USBI, MT, T1, 2.XI.2015, leg. M. López- Ortega ; 5 ♀ same data as for preceding, but dates 21.III–8.IV.2015, 25.VI.2015, 20.X.2015, ( UNAM, UAT, ZISP) ; 3 ♀ Hidalgo, Tlanchinol, La cabaña, arroyo lento, N 21°01′19.5″, W 98°38′45.1″ 1520 m, MT, 17–30.VI.2005, leg. A. Contreras et al. ( UNAM, ZISP) .

Description. Female. Fore wing length 2.9 mm.

Face medially 1.1 × as wide as high; smooth and polished, with shallow, sparse punctures, and indistinct horizontal striae; eyes not setose, dorsal ridge of face inbetween antennal sockets without a prominence; orbits strongly divergent ventrally; face profile slightly rounded, edge of clypeus straight, slightly impressed, antennal sockets not on a distinct high shelf (Hw/Fp = 9.4); subocular sulcus distinct, sharp, nearly straight; maxillary palp reaching slightly beyond fore coxa. In dorsal view, head posteriorly slightly concave, temples narrow, only slightly protruding posterior to eye, about 0.15 × eye width, hind ocellus separated from eye by 0.8 × ocellar diameter, anterior ocellus separated from eye by 1.7 × ocellar diameter, lacking ocellar-ocular grooves. Minimum distance between antennal sockets nearly equal to 2/3 diameter of socket; antenna comparatively short, with 21–23 flagellomeres (n=12) elongate, flagellomeres which gradually slightly shortening towards apex of antenna; basal flagellomere 2.0 × as long as wide and about half of the length of scape; scape with internal surface convex, outer side concave.

Mesosoma polished except for inconspicuous punctation on anterior of mesoscutum and pronotum with short striate postero-ventrally; sometimes with vague, coriaceous microsculpture dorsally on propodeum; mesoscutum anteriorly with notauli; in profile, scutellum high, metapleuron convex; propodeum with posterior transverse carina complete, strong, raised as distinct projections at level of lateral longitudinal carinae; median longitudinal and lateral longitudinal carinae complete, spiracles medium-sized.

Legs broad; coxae and femora polished, femora with inconspicuous alutaceous sculpture, tibiae and tarsi coriaceous-granulate; hind coxa 1.0 × as long as first tergite, hind femur 3.0 × as long as high, hind tibia 4.0 × as long as apically wide; tibiae with spine-like setae.

Wings not particularly narrow; fore wing with areolet open, vein Rs slightly upcurved; hind wing with nervellus straight, not intercepted.

First tergite elongate, 1.5 × as long as apically wide, in dorsal view, slightly wider at spiracles; coriaceous, with strong complete median longitudinal carinae, with transverse impressions originating at about middle of tergite, sloping posteriorly, not meeting centrally. Second tergite 0.8 × as long as apically wide; coriaceous, with longitudinal striae, median longitudinal carinae of first tergite continuing onto base of second tergite, with diagonal-transverse impressions originating at about middle of tergite, sloping anteriorly and posteriorly, not meeting centrally, forming a somewhat oval or diamond-shaped horizontal uplifted area in the middle, apical margin polished; basal thyridia nearly oval, contrastingly coloured; third tergite with coriaceous microsculpture basally and narrow basal thyridia, contrastingly coloured. Remainder of metasoma unsculptured, polished. Ovipositor slightly upcurving, with well-defined notch; ovipositor sheath pointed, with sparse, long, backwards-directed setae.

Body setose except eyes, pronotum, mesopleuron and metapleuron, setae scattered on metasoma and posterior coxae.

Dark to blackish brown except face, clypeus, base of antenna ventrally, propleuron, pronotum ventrally, and legs largely yellow; mouthparts, malar space behind subocular sulcus, frontal orbits in lower half, tegula, sternites and fore and mid coxae, hind coxa apically, all trochanters and trochantelli creamy. Hind coxa and hind femur apically, hind tibia basally and dorsoapically and apical tarsomere, sometimes mesosternum and apical margin of second tergite brown.

Male. Unknown.

Biology. Hosts unknown. Material collected from cloud forests and lower elevation sites.

Distribution. Mexico (Hidalgo, Oaxaca, Veracruz).

Etymology. Named after M. López-Ortega (INBIOTECA)—one of the collectors of this species.

Comments. Compared with the other species that have a complete posterior transverse carina and short notauli, the subocular sulcus is nearly straight, unlike in O. brevicorins , O. latus , O. luteoclypeus and O. maculae ; hind coxae blackish, unlike in O. brevicorins , O. rufipleuris , O. similis and O. varicolor ; upper frontal orbits brown, unlike in O. scutellatus , O. luteoclypeus and O. maculae and ovipositor has a distinct dorsal notch, which is lacking in O. malaris , O. luteoclypeus and O. tlaxcalensis .

Figures

FIGURE 5. Lateral views: Orthocentrus maculae species-group.A: lopezi, B: rufipleuris, C: scutellatus, D: similis, E: tergalis, F: varicolor. Scale 1.0 mm.

FIGURE 10. Faces: Orthocentrus montanus (in part) and O. maculae species-groups. A: montezuma, B: sierrae, C: tlaxcalensis, D: brevicornis, E: coronadoae, F: latus, G: lopezi, H: rufipleuris, I: scutellatus, J: similis, K: tergalis, L: varicolor. Scale 0.2 mm.

FIGURE 14. Heads in dorsal view: Orthocentrus maculae and O. ungularis species-groups. A: brevicornis, B: coronadoae, C: latus, D: lopezi, E: rufipleuris, F: scutellatus, G: similis, H: tergalis, I: varicolor, J: elongatus, K: flavoorbitalis, L: hidalgoensis, M: longiventris, N: rhombifer, O: ungularis. Scale 0.2 mm.

FIGURE 17. Basal tergites: Orthocentrus maculae and O. ungularis species-groups. A: brevicornis, B: coronadoae, C: latus, D: lopezi, E: rufipleuris, F: scutellatus, G: similis, H: tergalis, I: varicolor, J: elongatus, K: flavoorbitalis, L: hidalgoensis, M: longiventris, N: rhombifer, O: ungularis. Scale 0.2 mm.

FIGURE 27. Distribution map of Orthocentrus in Mexico. O. coronadoae, O. lopezi, O. rectus, O. scutellatus