Exochus adentatus Lee & Choi 2016, sp. nov.
Creators: name: Choi, Jin-Kyung
name: Kolarov, Janko
name: Lee, Jong-Wook
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Exochus
Exochus adentatus

description: Exochus adentatus Lee & Choi sp. nov.
(Figures 1b, 3b, 6b)
Specimens examined
Holotype: female, type depository: YNU; (South Korea) GW, Wonju-si, Baegun-mycon, Baegunsan, 11 May – 12 June 2007, leg. J.W. Lee; Paratype: type depository: YNU; 1 female, JN, Gurye-gun, Gurye-eup, Nogodan, Jirisan National park (M. T.), 2 June – 10 October 2001, leg. J.C. Jeong.
Description
Female. Forewing 6.7 mm, body 8.1 mm long.
Colour. Black. Scape and pedicel from below, face, clypeus, malar space, mandible, palpi, whole frontal orbita widely, greater part of outer orbita, a spot on middle of frons, upper margin of pronotum widely, tegula, subtegular edge, a spot on middle of mesoscutum, scutellum and postscutellum entirely, a longitudinal stripe below subtegular edge and legs, except basal two-thirds of hind coxa yellow; flagellum from below and apical light brown.
Head. Strongly narrowed behind eyes. Frons moderately concave behind base of antennae. Diameter of ocellus 1.1 times as long as distance between top of eye and lateral ocellus. Antenna with 26 – 27 flagellomeres. First flagellomere 2.2 times as long as wide, flagellomeres of apical half of antenna square. Temple a little longer than transverse diameter of eye (16: 15), widened down. Occipital carina weakly developed only laterally, hypostomal carina weak. Face strongly convex transversally (Figure 3b), 1.8 times as wide as high in frontal view. Anterior tentorial pits distinct. Clypeus with straight apical edge. Malar space with shallow furrow, 0.43 times as long as basal width of mandible. Lower tooth of mandible indistinct.
Mesosoma. Depressed, 2.1 times as long as high in lateral view. Epomia moderately strong, notaulus presented as small fossa on front 0.2 of mesoscutum. Scutellum flat. Mesopleuron swollen in front half, sternaulus indistinct. Prepectal carina not reaching subtegular edge, obsolescent on upper third of mesopleuron. Hind part of mesosternum not projected back as teeth. Metapleuron shiny with only some setae on hind lower corner. Vein Rs originating from middle of pterostigma. Vein Rs+M strongly curved. Vein Cu-a strongly postfurcal as 0.6 of its length. Hindwing with seven distal hamuli. Vein cu-a of hindwing inclivous, interrupted in lower 0.25, vein 3Cu distinct. Legs strongly stout. Fore femur 1.8 times, hind femur 1.9 times as long as wide. Ratio between length of hind tarsal segments 23: 11: 8: 6: 12. Tarsal claws simple. Front spur of mid tibia 0.4 times as long as hind spur. Propodeum with costula weakly developed. Lateromedian longitudinal carinae parallel (Figure 6b). Area dentipara with only a few setae. Area basalis confluent with area superomedia. Propodeal spiracle 2.0 times as long as wide, situated in equal distance between pleural and lateral longitudinal carina. Fore third of justacoxal carina widened and projected as a tooth.
Metasoma. Median longitudinal carinae of tergite 1 extending on 0.4 of tergite length. Metasomal tergites sparsely punctured. Tergite 2 0.75 times as long as wide apically. Epipleuron of tergite 3 semicircular, the basal three-quarters of the edge moderately convex. Ovipositor sheath no longer than apical depth of metasoma. Ovipositor gradually pointed to apex.
Male. Unknown.
Etymology
From indistinct lower tooth of mandible.
Distribution
South Korea.
Remarks
The species is close to Exochus fi rmus Kusigemati, 1971, but differs by its larger body, indistinct lower tooth of mandible, wider face, strongly curved vein Rs+M in forewing and colour pattern.
description: Published as part of Choi, Jin-Kyung, Kolarov, Janko & Lee, Jong-Wook, 2016, A taxonomic review of the genus Exochus Gravenhorst (Hymenoptera: Ichneumonidae: Metopiinae) from South Korea with descriptions of ten new species, pp. 2327-2367 in Journal of Natural History 50 on pages 2331-2332, DOI: 10.1080/00222933.2016.1197335, http://zenodo.org/record/3993034