Orthocentrus wahlbergi 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 : 228-229

Orthocentrus wahlbergi Veijalainen , sp. nov.

Figs 4 C, 7 I, 9 I, 12 I, 14 I.

Fore wing length 2.9–3.3 mm.

Face medially 1.2x wider than high, pustulate-papillate (and in Costa Rican specimen especially also head between eyes at ocelli); eyes densely to sparsely setose; dorsal ridge of face inbetween antennal sockets without a median prominence; face in profile almost straight, slightly rounded especially dorsally, edge of clypeus lightly impressed, antennal sockets on a shelf but shelf not particularly high; malar groove distinct, not deep, bent towards occiput; maxillary palp reaching to about epicnemial carina. In dorsal view, head posteriorly slightly concave, temples short but distinct, posterior ocellus separated from eye by 1.3x ocellar diameter, anterior ocellus separated from eye by 2.3x ocellar diameter, lacking ocellar-ocular grooves. Minimum distance between antennal sockets about half diameter of socket; antenna slender, about as long as body, with 34–37 (n=5) elongate flagellomeres, basal flagellomere about 2/3 of the length of scape and 0.4x as wide as high, flagellomeres gradually shortening towards apex, scape almost parallel-sided, slightly convex on inner side.

Mesosoma smooth and polished except propodeum with weak microsculpture; mesoscutum lacking notauli; in profile, scutellum somewhat high, metapleuron moderately convex, propodeum with posterior transverse carina present between lateral longitudinal carinae, median longitudinal carinae complete, and lateral longitudinal carinae reach and typically end at the level of spiracles, sometimes continue past spiracles as very weak sculpture; spiracles small.

Legs broad, coxae polished, femora polished-coriaceous, tibiae and tarsi granulate-coriaceous, hind coxa 1.2x as long as first tergite, hind femur 3.1–3.3x as long as high, hind tibia 3.9–4.1x as long as apically wide and with spine-like setae

Wings not particularly narrow; fore wing with areolet open but usually with very weak trace of 3rs-m dorsally, vein Rs straight, hind wing cu-a intercepted at lower part.

First tergite apically clearly widening, 1.2x as long as apically wide; coriaceous-rugose, posteriorly usually strigose, 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 0.6– 0.7x as long as apically wide; coriaceous, sometimes coriaceous-strigose, with transverse impressions originating at about middle of tergite, sloping posteriorly below second thyridia, meeting centrally, basal thyridia rectangular/ oval, pale, second thyridia rounded-oval raised and polished areas. Third tergite smoothly coriaceous, second thyridia slightly raised, polished, rounded areas. Remaining tergites smooth and polished. In type specimens, ovipositor and ovipositor sheaths not well visible; in holotype, ovipositor seems straight, without notch.

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

Yellow except antennae, frons to varying degree, interocellar area, temples and genae partly, occiput, pronotum anterodorsally, mesopleuron dorsally, mesoscutum and scutellum except varying degrees of yellow patches at, e.g., expected locations of notauli, axilla, propodeum, metasoma except usually apical edges of second and third tergite and thyridia on second tergite and sternites, and usually legs (especially fore and mid tibiae and tarsi dorsally, hind coxa dorsally, and hind femur, tibia and tarsi dorso-apically), brown, malar area behind malar groove, inner orbits from about antennal sockets to posterior ocelli, tegula, dorsal corner of metapleuron at tegula, fore and mid coxae, trochanters and trochantelli, creamy, mouthparts and sternites creamy to brownish creamy.

Male. Unknown.

Biology. Hosts unknown. All specimens were collected in mid-elevation Central American locations.

Etymology. Named after Niklas Wahlberg for his wonderful support as a thesis supervisor.

Comments. Compared with the other species that have antennae usually on a distinct but low shelf, completely papillate face, setose eyes, and second tergite with a posterior transverse groove, the malar groove is strongly bent towards the occiput, unlike in O. flavifrons and O. tenuiflagellum , the metapleuron is brown and the first tergite apically strongly widening, unlike in O. harlequinus .

Material examined. Holotype female: ‘ Honduras, Olancho, PN La Muralla, 15.09837 ºN, 86.74240 ºW, 1510± 10 m, cloud forest, Malaise trap, 2–5.V.2010, LLAMA #Ma-C- 01-1-01 ’ ( BMNH).

Paratypes: 1 ♀: Guatemala, Baja Vera, Biotopo Quetzal, 1720± 10 m, 15.21278 ºN, 90.21552 ºW, cloud forest, 7–10.V.2009, Malaise, LLAMA #Ma-B- 02-1-01; 1 ♀ as previous but 1685± 9 m, 15.21370 ºN, 90.21822 ºW, LLAMA #Ma-B- 02-2-01 (all ZMUT); 2 ♀ as previous but 1690± 8 m, 15.21357 ºN, 90.21826 ºW, LLAMA #Ma-B- 02-2-02; 1 ♀: Honduras, Comayagua, 9 km E Comayagua, 14.44412 ºN, 87.55429 ºW, 1720± 5 m, disturbed pineoak forest, Malaise trap, 17–19.V.2010, LLAMA #Ma-C- 03-3-01 (all USNM); 1 ♀: Costa Rica: San José Pv., Zurquí de Moravia 1600 m, nr to Braulio Carrillo, NP., VIII–IX 1989, Gauld ( BMNH).

The holotype ( Orthocentrus sp. 16 F 596 LLAMA Ma-C- 01-1-01) and two of the Guatemalan paratypes ( Orthocentrus sp. 16 F GUA 80 LLAMA Ma-B- 02-1-01; Orthocentrus sp. 16 F GUA 75 LLAMA Ma-B- 02-2-01) were sequenced by Veijalainen et al. (2012). They clustered together and were clearly separated from the remaining individuals based on their haplotypes.

Figures

FIGURE 4. Lateral views: Orthocentrus wahlbergi species-group (in part). A: tenuiflagellum, B: umbrocciput, C: wahlbergi. Scale 0.5 mm except in A 1.0 mm.