Orthocentrus trichophthalmus Humala & Lee, 2020

Humala, Andrei E., Lee, Jong-Wook & Choi, Jin-Kyung, 2020, A review of the genus Orthocentrus Gravenhorst (Hymenoptera, Ichneumonidae, Orthocentrinae) from South Korea, Journal of Hymenoptera Research 75, pp. 15-65 : 15

24. Orthocentrus trichophthalmus Humala & Lee sp. nov.

Fig. 17

Description.

Female. Fore wing length 3.8 mm.

Face at level of antennal sockets 0.9 times as wide as high; face fairly sparsely punctate, shining, eyes setose, dorsal ridge of face in between antennal sockets without a median prominence; face profile gently curved, edge of clypeus somewhat impressed, margin straight, antennal sockets not on a distinct high shelf; subocular sulcus gently curved; maxillary palp long, reaching back to fore coxae. In dorsal view, head posteriorly moderately concave, temples distinct, lateral ocellus distant from eye by its maximum diameter, POL 1.1 times as long as diameter of lateral ocellus, ocellar-ocular grooves absent. Minimum distance between antennal sockets about 0.4 × diameter of socket; antenna long, slender, with 45 flagellomeres which gradually shorten towards apex of antenna; first flagellomere 2.1 times as long as wide and 0.6 times as scape length; scape slightly curved, in frontal view a little concave on lateral surface, convex on inner surface.

Mesosoma smooth, polished, impunctate except mesoscutum with shallow punctures, some faint coriaceous/rugose microsculpture on propodeum; mesoscutum lacking notauli; in profile, scutellum weakly convex, metapleuron slightly convex; propodeum with posterior transverse carina strong and raised, lateromedian longitudinal carinae complete, spiracle not particularly large.

Legs stout, hind leg massive; hind femur 3.1 times as long as maximum depth, hind tibia 4.1 times as long as apical width; tibiae lacking spine-like setae.

Wings not particularly narrow; fore wing with narrowly sessile areolet, slightly shorter than high, pterostigma narrow, vein Rs+2r meeting pterostigma at apical third; vein Rs nearly straight; nervellus intercepted below, angulate.

First tergite somewhat elongate and apically slightly widening, 1.6 times as long as posteriorly wide; heavily rugose without lateromedian longitudinal carinae, with transverse impressions originating at about middle of tergite, sloping posteriorly, and meeting centrally by transverse furrow. Second tergite 1.2 times as long as posteriorly wide; heavily rugose, with transverse impressions originating at about middle of tergite, sloping posteriorly, meeting centrally, delimiting vaguely defined rhombic area centrally; thyridia present. Third tergite with rugose/strigose sculpture, sculpture towards posterior edge smoother, with transverse impressions originating at about middle of tergite, sloping anteriorly, meeting centrally. Posterior tergites slightly coriaceous. Ovipositor thin, straight, without dorsal notch; ovipositor sheaths short, concealed by large hypopygium.

Setae over whole body except pronotum, mesopleuron, metapleuron, scattered on propodeum and dorsal sides of coxae.

Blackish-brown; flagellomeres brown, dull orange basally; face clypeus and malar space dull yellow/pale orange, frons fuscous, vertex with creamy orbital marks between eyes and ocelli, small pale area behind subocular sulcus; indistinct reddish-brown patches at anterolateral margins and whole course of notauli (if they were impressed), scutellum brown; propleuron, ventrally on pronotum and lower third of mesopleuron pale orange; legs basically dull yellow/orange, narrow basal band on hind tibia dark brown, fore and mid coxa, all trochanters and trochantelli pale. Tergites dark brown, second and third tergites narrowly dull orange apically. Sternites creamy with yellow more sclerotized patches.

Male. Unknown.

Biology.

Hosts unknown.

Etymology.

Named from the Greek τρίχα (hair) and οφθαλμός (eye) after the densely setose eyes.

Comparison.

Compared with the other species that have densely setose eyes, it is much larger, the mesoscutum with reddish bars along notauli, antennae comparatively long, with 45 flagellomeres, unlike in O. trichoptilus , O. hirsutor and O. setosus .

Material examined.

Holotype: female; South Korea, GW: Wonju-si , Heungeop-myeon , Maeji-ri 234, Yonseidae, MT, 31.VII-5.IX.2014, H.Y. Han leg. (DNUE).

Distribution.

South Korea (GW).

Figures

Figure 17. Orthocentrus trichophthalmus sp. nov. Holotype. A Habitus in lateral view B head in frontal view C head in dorsal view D head and mesosoma in lateral view E mesosoma in dorsal view F fore wing G first to third tergites in dorsal view.