Orthocentrus coronadoae, Humala, 2019

Humala, Andrei E., 2019, Mexican species of the genus Orthocentrus (Hymenoptera, Ichneumonidae: Orthocentrinae), Zootaxa 4709 (1), pp. 1-83 : 22-24

Orthocentrus coronadoae sp. nov.

( Figs 4 E , 10 E , 14 B , 17 B , 27 )

Material examined. Holotype ♀: México, Tamaulipas, rancho Sta. Elena, 15 km SW Cd.Victoria , 23°37′21″ N 099°12′45″ W, 964 m, MT 18–25.III.2010, leg. A. E. Humala & E. Ruiz C. ( UAT).

Paratypes: 5 ♀ with same data as for holotype ( UAT, UNAM and ZISP) .

Description. Female. Fore wing length 2.8 mm.

Face medially 1.1 × as wide as high; smooth and polished, with shallow, sparse punctures, eyes not setose, dorsal ridge of face inbetween antennal sockets without a prominence; inner orbits divergent ventrally; face profile nearly straight, edge of clypeus almost straight, slightly impressed, antennal sockets not on a distinct high shelf (Hw/Fp = 10.9); subocular sulcus distinct, sharp, nearly straight; maxillary palp reaching slightly beyond fore coxa. In dorsal view, head posteriorly concave, temples slightly protruding posterior to eye, about 0.3 × eye width; hind ocellus separated from eye by 1.1 × ocellar diameter, anterior ocellus separated from eye by 2.1 × ocellar diameter, lacking ocellar-ocular grooves. Minimum distance between antennal sockets slightly more than half diameter of socket; antenna slender, with 19(20) flagellomeres (n=4) elongate, flagellomeres which gradually slightly shortening towards apex of antenna; basal flagellomere 3.5 × as long as wide and about 3/4 of the scape length; 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 strongly convex; propodeum with posterior transverse carina complete, strong, raised as distinct projections at level of lateral longitudinal carinae; median longitudinal carinae complete, lateral longitudinal carinae complete, spiracles medium-sized.

Legs broad; coxae and femora polished, femora with inconspicuous alutaceous-coriaceous sculpture, tibiae and tarsi coriaceous-granulate; hind coxa as long as first tergite, hind femur 2.9 × as long as high, hind tibia 3.9 × as long as apically wide; tibiae with spine-like setae.

Wings not particularly narrow; fore wing with areolet open, vein 2 rs-m longer than portion of cubitus (Rs + M) between 2 rs-m and second recurrent vein (2m-cu); vein Rs slightly upcurved; hind wing with nervellus intercepted below.

First tergite elongate, 1.5 × as long as apically wide, in dorsal view, slightly wider at spiracles; coriaceous, with complete median longitudinal carinae, with transverse impressions originating at about middle of tergite, sloping posteriorly, not meeting centrally. Second tergite 1.1 × as long as apically wide; coriaceous, with irregular longitudinal striae, median longitudinal carinae of first tergite continuing onto second tergite, with diagonal-transverse impressions originating at about middle of tergite, sloping anteriorly and posteriorly, meeting centrally, forming a somewhat oval or diamond-shaped horizontal uplifted area in the middle; thyridia not developed. Third tergite coriaceous, with longitudinal striae in basal 2/3, without thyridia, with diagonal-transverse impressions originating at about middle of tergite, sloping anteriorly and posteriorly, not meeting centrally; apical margin unsculptured. Sometimes median longitudinal carinae of second tergite continuing also onto base of third tergite. Remainder of metasoma impunctate. Ovipositor rather strong, straight, without dorsal notch; ovipositor sheath pointed, with sparse, long, backwards-directed setae.

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

Dark to brown except face, lower frons, clypeus, malar space, lower temples, yellow; mouthparts, inner orbits, antenna, tegula, sternites and fore and mid legs creamy to light yellow; propleuron, anterior pronotum, apical margin of second tergite and hind legs entirely yellowish rufous; mesoscutum and mesosternum sometimes reddish brown.

Male. Unknown.

Biology. Hosts unknown.

Distribution. Mexico (Tamaulipas).

Etymology. Named after Dr Juana Maria Coronado Blanco (UAT)—an expert in Mexican Braconidae .

Comments. Compared with the other species that have a complete posterior transverse carina, short notauli, and open areolet, the subocular sulcus nearly straight, unlike in O. latus , O. luteoclypeus , O. maculae and O. rufipleuris ; hind legs entirely yellowish rufous, unlike in O. scutellatus ; basal flagellomere long and second tergite with complete median longitudinal carinae, unlike in O. rufipleuris , O. similis and O. varicolor .

Figures

FIGURE 4. Lateral views: Orthocentrus montanus (in part) and O. maculae (in part) species-groups.A: montezuma, B: sierrae, C: tlaxcalensis, D: brevicornis, E: coronadoae, F: latus. 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