Orthocentrus consobrinus 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

5. Orthocentrus consobrinus Humala & Lee sp. nov.

Fig. 4

Description.

Female. Fore wing length 4.0 mm.

Face at level of antennal sockets 1.4 times as wide as high; smooth, polished, slightly punctate; eyes not setose; dorsal ridge of face inbetween antennal sockets with a low median blunt 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, sharp, slightly bent towards occiput; maxillary palp reaching beyond fore coxa. In dorsal view, head posteriorly moderately concave, temples short but distinct, lateral ocellus separated from eye by its maximum diameter, POL 1.1 times as long as diameter of lateral ocellus; ocellar-ocular grooves present. Minimum distance between antennal sockets about 0.8 × diameter of socket; antenna short, with 21 flagellomeres elongate, gradually shortening towards apex of antenna; first flagellomere 1.8 times as long as wide and about half of the scape length; 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 polished, femora with coriaceous microsculpture, tibiae and tarsi coriaceous-granulate; hind femur 2.7 times as long as high, hind tibia 4.0 times as long as apically wide; tibiae with spine-like setae.

Wings not particularly narrow; fore wing with small narrow areolet, vein Rs straight posteriorly, vein cu-a opposite Rs&M, oblique; nervellus straight, intercepted below.

First tergite slightly widening posteriorly, 1.5 times as long as apically wide; coriaceous, with two indistinct lateromedian longitudinal carinae and indistinct longitudinal striae, with transverse impressions originating at about middle of tergite, sloping posteriorly, not meeting centrally.

Second tergite as long as posteriorly wide; coriaceous and longitudinally striate, anterior corners impressed and transverse groove near posterior margin bending anteriorly near lateral margins, forming a somewhat uplifted area medially; small thyridia rounded. Remainder of metasoma unsculptured, polished; third tergite with coriaceous microsculpture anteriorly. Ovipositor comparatively thin, slightly upcurved, without subapical dorsal notch; ovipositor sheath narrow, with sparse setae.

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

Blackish brown; face brown, yellowish along upper margin, inner orbits broadly light yellow from centre of face to level of front ocellus, antenna proximally and ventrally yellowish; malar area yellowish posterior to malar sulcus and up to level of ventral edge of eye; mouthparts, fore and mid coxae, all trochanters and trochantelli yellowish brown, remainder of fore and mid legs orange; hind legs slightly darker, apical margin of second tergite light brown.

Male. Unknown.

Biology.

Hosts unknown.

Etymology.

Named from the Latin Orthocentrus consobrinus (relative), after the conspicuous similarity to O. koreanus .

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 present, unlike in O. brachycerus and O. leei . From the allied O. koreanus it differs in the brown face, smaller number of antennal flagellomeres and the first tergite 1.5 times as long as apically wide.

Material examined.

Holotype: female; South Korea, GW, Mt. Taebaeksan , 14.V-20.VI.1999, D.S. Ku leg. (NIAS).

Paratype: 1♀, Russia, Primorsky Terr., Vladivostok, Sedanka , 100 m, 17.V.2016, S. Belokobylskij leg. (ZIN) .

Distribution.

South Korea (GW), Russia (Primorsky Terr.).

Figures

Figure 4. Orthocentrus consobrinus 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.