Orthocentrus hispidus Veijalainen

Veijalainen, Anu, Broad, Gavin R. & Sääksjärvi, Ilari E., 2014, Twenty seven new species of Orthocentrus (Hymenoptera: Ichneumonidae; Orthocentrinae) with a key to the Neotropical species of the genus, Zootaxa 3768 (3), pp. 201-252 : 208-209

Orthocentrus hispidus Veijalainen , sp. nov.

Figs 1 D, 6 C, 8 C, 11 C, 13 C.

Fore wing length 2.4–2.6 mm.

Face medially 1.1x wider than high; face matt, very finely and densely horizontally strigose-pustulate, frons finely pustulate with hairs and finely strigose right behind antennal sockets, temples with fine matt-like coriaceous sculpture; eyes setose; dorsal ridge of face inbetween antennal sockets without a median prominence; face in profile almost straight, slightly impressed dorsally, edge of clypeus straight, antennal sockets on a high shelf; malar groove distinct, sharp, bent towards occiput; maxillary palp reaching to about epicnemial carina. Head in dorsal view posteriorly deeply concave, temples distinct, posterior ocellus separated from eye by 0.7x ocellar diameter, anterior ocellus separated from eye by 1.0x ocellar diameter, ocellar-ocular grooves present. Minimum distance between antennal sockets very narrow, sockets almost touching each other; antenna basally thick, narrowing apically, curled, with 30 flagellomeres, flagellomeres transverse-quadrate, apical elongate, all about equal length, basal flagellomere 1.2x as wide as high and about 1/3 of the length of scape, scape parallel-sided.

Mesosoma smooth and polished except mesoscutum and scutellum regularly punctate, pronotum with short striations postero-ventrally, dorsal propodeum with coriaceous microsculpture; mesoscutum lacking notauli; in profile, scutellum somewhat high, metapleuron slightly convex; propodeum with posterior transverse carina present between lateral longitudinal carinae, median longitudinal carinae complete and anteriorly diverging, lateral longitudinal carinae reach to the level of spiracles as clear carinae or gradually fainting coriaceous sculpture; spiracles small to medium-sized.

Legs broad, hind coxa large; coxae polished, femora polished-coriaceous, tibiae and tarsi coriaceous-granulate; hind leg with coxa 1.2–1.4x as long as first tergite, hind femur 3.1–3.3x as long as high, hind tibia 3.3x as long as apical width; tibiae with strong spine-like setae.

Wings not particularly narrow; fore wing with areolet closed but 3rs-m usually weak, areolet about as high as wide, 2m-cu meeting areolet at apical 0.6–0.7, vein Rs straight; hind wing with cu-a not intercepted, almost straight, very gently curved.

First tergite elongate, apically hardly widening, 1.6x as long as apically wide; coriaceous-rugose, with two complete or posteriorly almost complete median longitudinal carinae, with transverse impressions originating at about middle of tergite, sloping posteriorly, not meeting centrally. Second tergite 0.7x as long as apically wide; coriaceous-rugose and somewhat strigose, sometimes apically polished, stubs of median longitudinal carinae present anteriorly, sometimes also posteriorly, with transverse impressions originating at about middle of tergite, sloping posteriorly, sometimes gently meeting centrally; basal thyridia oval-rectangular, contrastingly coloured, second thyridia not clear among sculpture or slightly raised roundish smooth areas at about middle of tergite.

Remaining tergites smooth and polished, especially third tergite with shallow punctures, without thyridia; third tergite sometimes anteriorly narrowly coriaceous-strigose. Ovipositor straight, rather stout, without notch; ovipositor sheaths with sparse backward-pointing setae.

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

Brown to dark brown except mouthparts, face sometimes centrally, fore and mid coxae, trochanters, trochantelli, and sometimes femora, and tegula, creamy to light yellow, sternites creamy to creamy brown, face largely, inner orbits at least near antennal sockets, antennae largely in the western Amazonian specimens, propleuron, pronotum and mesopleuron ventrally, legs largely except apical tarsi, dorsal hind tibia narrowly, and dorsal half of hind coxa, yellow. Division of dark and pale colours abrupt in the Belizean specimens, blurred in the rest.

Male. Unknown.

Biology. Hosts unknown. The specimens were collected in Belize and different forest types and vegetation layers of western Amazonian lowland rainforests, indicating that the species has a relatively wide distribution range.

Etymology. Named after the Latin for ‘bristly’, after the relatively densely setose eyes and face.

Comments. Compared with the other species that have antennal sockets on a high protruding shelf, thick, curled antennae, and the whole body not laterally flattened, the eyes are setose and the face matt, smoothly coriaceous-pustulate unlike in O. quercus , O. scurra and O. teres .

Material examined. Holotype female: ‘ Ecuador, Dept. Orellana, Onkone Gare, 216.3 m asl, 0º39’25.7’’ S, 76º27’10.8’’ W, 21 Jun 1996, canopy fogging, T.L. Erwin et al., Lot#1557’ ( USNM).

Paratypes: 1 ♀ Peru, Dept. of Loreto, Iquitos area, Allpahuayo, 16.IV.–3.V.2000, white sand, Sääksjärvi, I.E. et al. leg., Malaise trap, APHI G3/5 ( MUSM); 1 ♀ as previous but 3–22.V.2000, G3/6 ( MUSM); 1 ♀ Peru, Dept. of Loreto, Iquitos area, Allpahuayo, 3–17.XII.1998, clay, I.E.S., R.J. et al. leg., Malaise t., APHI C2/8 ( ZMUT); 6 ♀ Belize, Orange Walk Pv, Rio Bravo Conservation Area, N. of Gallon Jug, 18.III.92, 89º06‘ W [written as E], 17º45’ N, I. Gauld ( BMNH).

The holotype ( Orthocentrus sp. 4 F 252 ECU 1557) was sequenced by Veijalainen et al. (2012) and had a clearly distinctive haplotype.

Figures

FIGURE 1. Lateral views: Orthocentrus shieldsi species-group (in part). A: anguillae, B: pentagonum, C: concrispus, D: hispidus, E: quercus, F: shieldsi. Scale 0.5 mm.