Dusona koreana Choi & Lee

Choi, Jin-Kyung & Lee, Jong-Wook, 2014, Addition to the study of the genus Dusona (Hymenoptera, Ichneumonidae, Campopleginae) in Korea with description of a new species and key to the Korean species, ZooKeys 424, pp. 59-89 : 64-65

Taxon classification Animalia Hymenoptera Ichneumonidae

Dusona koreana Choi & Lee sp. n. Fig. 1

Holotype.

Female. Body length 16.5 mm. Fore wing 13.0 mm.

Color: Face and mesosoma black (Fig. 1B, E). Mandible yellow except black basally (Fig. 1B). Tegula blackish brown. All coxae black except fore coxa yellowish brown apically; fore trochanter to tarsus yellowish brown; mid trochanter and trochantellus black, mid femur to tarsus yellowish brown; hind trochanter to femur black, hind tibia yellowish brown marked dark brown apically. 2nd tergum on apical 0.25, 3rd tergum reddish brown broadly. Ovipositor reddish brown, ovipositor sheath black with brown apically.

Head: Frons slightly depressed, with median longitudinal carina, with transverse wrinkles (Fig. 1C). Antennal flagellum with 61 segments. Antennal carina low and narrow, above with radial wrinkles. Face convex, densely punctate. Clypeus separated from face by weak groove, with truncated apical margin. Mandible tapered to apex, lower tooth as long as upper tooth. Malar space 0.5 times as long as width of mandible. Occipital carina complete. Temple weakly convex.

Mesosoma: Pronotum with distinct epomia. Mesoscutum without notaulus. Speculum depressed and flat, mesopleuron in front of speculum with short longitudinal striae (Fig. 1E). Scutellum and postscutellum convex, scutellum without lateral carina. Propodeal spiracle elongate, distinctly connected to pleural carina. Propodeum depressed, with rugose wrinkles; anterior transverse carina of propodeum present medially, costula absent (Fig. 1D). First radius of fore wing originating before middle of pterostigma. Areolet large, with short stalk (Fig. 1G), 2nd recurrent vein originating before middle of areolet. Nervellus reclivous, intercepted in lower 0.25, discoidella faint (Fig. 1G). Hind wing with 9 distal hamuli. Tibiae and tarsi with short strong spines; tarsal claws pectinate.

Metasoma: Petiole with very strong glymma, dorsolateral carina very strong (Fig. 1F). Epipleurum separated from 3rd tergum, crease with distinct black line. 1st tergum 4.3 times as long as wide, 2nd tergum 1.6 times as long as wide. Ovipositor straight, shorter than hind tibia and longer than hind basitarsus. Ovipositor sheath wide and aciculate basally in lateral view (Fig. 1H).

Male. unknown.

Intraspecific variation based on the paratypes.

(only differences from holotype described) Antennal flagellum with 56-62 segments.

Material examined.

Holotype: [Korea] TD: YNU. 1 female, GW, Wonju-si, Panbu-myeon, Seogok-ri, Yongsugol, 19 May 2001, J.W. Lee & D.C. Kim. Paratype: [Korea] TD: YNU. 1 female, Seoul, Gangnam-gu, Wonji-dong, 1 June 1985, K.H. Shin; 1 female, GG, Cheonmasan, 7 June 1986, P.C. Yun; 1 female, GG, Seongnam-si, Namhansan, 23 May 1999, E.J. Kim. Non-Type: [Korea] TD: YNU. 1 female, 24 May 1986, S.Y. Park.

Distribution.

Korea.

Region.

Eastern Palaearctic.

Host.

Unknown.

Etymology.

The specific name is derived from Korea, the country of the type specimens.

Remarks.

The species is similar to Dusona cultrator (Gravenhorst, 1829) but differs by in the following characters: lower valve of ovipositor straight (Fig. 8E) (lower valve sinuous in Dusona cultrator ) (Fig. 8F), hind tibia yellowish brown marked dark brown apically (hind tibia yellowish brown, sometimes narrowly marked with brown basally in Dusona cultrator ); petiole with very large glymma (Fig. 1F), which is bordered by very distinct longitudinal carina dorsally; 1st tergum longer than 4 times as long as wide (1st tergum 3.4 times as long as wide in Dusona cultrator ). Also, the metasomal segments of Dusona are usually reddish brown and partly black but the metasoma of Dusona koreana is mostly black with only the 2nd tergum reddish brown apically and 3rd tergum widely reddish brown laterally (Fig. 1A).