Dolichomitus koreanus Lee & Choi

Choi, Jin-Kyung, Kolarov, Janko, Jeong, Jong-Chul & Lee, Jong-Wook, 2016, A taxonomic review of the genus Dolichomitus Smith (Hymenoptera: Ichneumonidae: Pimplinae) from South Korea with descriptions of two new species, Zootaxa 4132 (2), pp. 235-253 : 243-245

Dolichomitus koreanus Lee & Choi sp. nov.

( Figs 12–20 , 32)

Description. (female holotype).

Female. Fore wing 9.6 mm, body 13.5 mm, ovipositor sheath 12.5 mm long.

Color. Body black. Pterostigma fuscous. Upper hind angle of pronotum black. Palpi, tegula, all trochanters, base of tibiae, front surface of fore femur and tibia yellow. The rest of femora and tibiae red, hind femur darkened in apical 0.2. Fore and mid tarsus and fore coxa yellowish orange, darkened basally. Mid coxa black, apically reddish brown; hind coxa, tibia and tarsus entirely black; lower basal part of hind tibia and tarsus 1–3 from below reddish brown.

Head: Head shiny and distinctly widened behind eye ( Fig. 15 ). Face 1.3 × as wide as high in frontal view, with moderately coarse and sparse punctures, distance between punctures almost as long as their diameter. Inner margin of eyes distinctly divergent down ( Fig. 13 ). Clypeus 1.6 × as wide as high. Lower tooth of mandible slightly longer than upper tooth. Malar space with fine sculpture, 0.4 × as long as basal width of base of mandible. Frons weakly excavated above base of antennae, with short carina between antennal sockets; frons with fine and sparse punctures; vertex and temple smooth and brilliant. Distance between lateral ocellus and eye 1.4 as long as ocellus diameter. Distance between lateral ocellus and occipital carina about 1.5 × diameter of lateral ocellus. Occipital carina weak from above, connected with hypostomal carina far from base of mandible. Antenna short, with 25 flagellomeres and almost as long as head + mesosoma. First flagellomere 3.8 × as long as wide, flagellomeres before last enlarged, and last flagellomeres quadrate. Temple 1.09 × as long as transversal diameter of eye ( Fig. 14 ). Mesosoma: Pronotum without epomia. Mesoscutum smooth, without punctures and hairs on hind 2/3 of dorsal area, sparsely punctured and pubescent laterally. Middle lobe of mesoscutum strongly produced in front so that dorsal and frontal surfaces are almost flat, and form an angle less than 90º ( Fig. 15 ). Notaulus short and deep. Epicnemial carina weak laterally, reaching middle of front ridge of mesopleuron. Prepectus densely punctured, mesopleuron with moderately dense and coarse punctures. Scutellum with fine and very sparse punctures. Propodeum with well-developed middle longitudinal carinae in basal half ( Fig. 19 ), slightly transversally striated in apical half. Propodeal spiracle oval, closer to pleural carina. Submetapleural carina present. Legs stout. Fore tibia with 15 setae on middle of inside surface and five setae on apical inner ridge (Fig. 32). Hind femur 4.3 × as long as wide. Correlation length of hind tarsal segments as 62:31:18:7:18. Fore wing with slightly postfurcal nervulus ( Fig. 18 ). Nervellus of hind wing intercepted above middle ( Fig. 18 ). Hind wing with 11 distal hamuli. Metasoma: Metasomal tergites coarsely and densely punctate. First tergite 1.2 × as long as wide at apex; second tergite 1.1 × as long as wide ( Fig. 20 ). Median raised part of first tergite rugosely and weakly punctate. Lateral part of first tergite rather coarse and rugose. Second tergite without oblique groove running from base near the midline toward the spiracle. Lateral swellings on third to fifth tergites. Apex of tergites 2–5 with polished band. Ovipositor with two ridges on tip of upper valve.

Male. Fore wing 7.6 mm, body 10.9 mm long. Antenna with 27 flagellomeres, first flagellomere 3.5 × as long as wide, all flagellomeres elongate, and last flagellomere not enlarged. Relative length of hind tarsal segments as 60:26:13:10:25.

Color. Body black. Antenna from below, palpi, tegula, and base of tibiae yellow orange; fore and mid legs, except base of coxa, hind trochanters and femora reddish orange, femora darkened apically; basal half of hind tibia from below and base of first tarsus of hind leg yellowish brown.

Material examined. [ South Korea] (TD: YNU): Holotype: ♀, Bamsagol, Jirisan National Park, Sannaemyeon, Namwon-si, JB, 35°21′57.36″N 127°35′3.88″E, 11.iii–14.vii.2011, J.C. Jeong; Paratype: 1♀, Dobongsan, Dobong-gu, Seoul, 31.v.1994, M.J. Sin; 1♂, Ungyo-ri, Baekdeoksan, Banglim-myeon, Pyeongchang-gun, GW, 2.vi.2001, D.S. Choi, D.S. Kang & O.Y. Lim; 1♂, Wangdeungjae, Jirisan National Park, Upyeong-ri, Samjeongmyeon, Sancheon-gun, GN, 35°23′8.81″N 127°46′44.11″E, 16.v.2011, J.C. Jeong.

Distribution. South Korea.

Region. Eastern Palaearctic.

Host. Unknown.

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

Remarks. This species is similar to D. curticornis ( Perkins, 1943) but differs by having a prominent middle lobe of mesoscutum, well developed middle longitudinal carinae of propodeum, second tergite without oblique groove running from base near the midline toward the spiracle, black hind coxa, and coloration of the body.

Figures

FIGURES 12 – 20. Dolichomitus koreanus Lee & Choi sp. nov., (12) Habitus in dorsal view, (13) Head in frontal view, (14) Head in lateral view, (15) Head and mesoscutum in dorsal view, (16) Mesosoma in lateral view, (17) Tarsal claw, (18) Wings, (19) Scutellum and propodeum, (20) First to third tergites in dorsal view. Scale bars (12,18): 2 mm, (13 – 16, 19,20): 0.5 mm, (17): 0.2 mm.