Orthocentrus leei Humala & Choi, 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

10. Orthocentrus leei Humala & Choi sp. nov.

Fig. 8

Description.

Female. Fore wing length 2.9 mm.

Face at level of antennal sockets 1.4 times as wide as high; face smooth, polished, slightly punctate, eyes not setose, dorsal ridge of face in between antennal sockets with a median blunt low prominence; face profile straight except dorsally very slightly impressed, inner orbits divergent ventrally; edge of clypeus straight, antennal sockets not on a distinct high shelf; subocular sulcus distinct, gently bent towards occiput; maxillary palp reaching to fore coxa. In dorsal view, head posteriorly concave, temples short but distinct, lateral ocellus separated from eye by its maximum diameter, POL 1.2-1.5 times as long as diameter of lateral ocellus; ocellar-ocular grooves present. Minimum distance between antennal sockets about 0.6 × diameter of socket; antenna short, with 18-20 flagellomeres gradually shortening towards apex of antenna; first flagellomere 1.7 times as wide as high and about half of length of scape; scape slightly convex on inner surface, slightly concave on outer surface.

Mesosoma smooth and polished; mesoscutum anteriorly with distinct notauli; in profile, scutellum weakly convex, metapleuron slightly convex; propodeum with posterior transverse carina complete, strong and raised between lateral longitudinal carinae; lateromedian longitudinal carinae complete, lateral longitudinal carinae distinct, spiracle small.

Legs robust; coxae and femora polished, femora partly with coriaceous microsculpture, tibiae and tarsi coriaceous-granulate; hind femur 2.7 times as long as high, hind tibia 3.3 times as long as apically wide; tibiae with spine-like setae.

Wings not particularly narrow; fore wing without areolet; vein Rs nearly straight, fore wing with vein Rs+2r meeting pterostigma at basal 0.45; vein cu-a slightly distad of Rs&M; nervellus intercepted below.

First tergite slightly widening posteriorly, 1.5 times as long as posteriorly wide; coriaceous, with two lateromedian longitudinal carinae and longitudinal striae, with transverse impressions originating at about middle of tergite, sloping posteriorly, not meeting centrally. Second tergite 0.9 times as long as posteriorly wide; coriaceous and longitudinally striate, anterior corners impressed and transverse groove near posterior margin bent anteriorly near lateral margins, forming a somewhat uplifted area medially; thyridia rounded and contrastingly coloured. Third tergite with anterior thyridia and coriaceous microsculpture in anterior half. Remainder of metasoma unsculptured, polished; Ovipositor comparatively thin, slightly upcurved, with shallow subapical notch; sheath narrow, with setae directed backward.

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

Blackish brown; face brown, inner orbits with small yellowish marks close to antennal sockets; clypeus and upper face, antenna orange; malar area posterior to malar sulcus yellowish; mouthparts whitish-yellow, fore and mid legs yellow; hind legs dull orange, hind coxa dark brown in basal 3/4, hind femur somewhat infuscate centrally; posterior margin of tergite 2 and tergite 3 anteriorly and posteriorly yellowish-brown; sternites creamy.

Male. Unknown.

Biology.

Hosts unknown.

Etymology.

This species is named in honor of Professor Jong-Wook Lee, a Korean expert on Ichneumonidae and Head of the Animal Systematic Laboratory of Yeungnam University.

Comparison.

Compared with the other species that have a lenticular head, flattened and smooth face, short temples, and eyes glabrous, the fore wing areolet is absent and the flagellum has fewer than 20 flagellomeres, unlike in O. koreanus and O. consobrinus . From the allied O. brachycerus it differs in the fuscous face and frontal orbits with small yellowish marks, and the POL 1.1 times as long as the diameter of an ocellus.

Material examined.

Holotype: female; South Korea GG: Pocheon-si , Soheur-eup , Jikdong-ri, 51-7, Korean National Arboretum, 37°45'1.9"N, 127°08'34.4"E, MT 4, 24.VII-5.VIII.2013, I.G. Kim leg. (DNUE).

Paratype: South Korea, CB: 1♀, Geoisan-gun , Chilseong-myeon , Gallon-ri, Gallon valley, 36°43'51.72"N, 127°51'48.89"E, 22.VII-27.X.2011, J.W. Lee leg. (DNUE) .

Distribution.

South Korea (CB, GG).

Figures

Figure 8. Orthocentrus leei 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 areolet G first to third tergites in dorsal view.