A review of the genera Gnathochorisis Foerster and Symplecis Foerster of South Korea, with notes on Korean orthocentrines (Hymenoptera, Ichneumonidae, Orthocentrinae) Author Humala, Andrei E. Author Choi, Jin-Kyung Author Lee, Jong-Wook text ZooKeys 2016 562 85 104 http://dx.doi.org/10.3897/zookeys.562.7303 journal article http://dx.doi.org/10.3897/zookeys.562.7303 1313-2970-562-85 F76DF98033CF4DE7AF324EF385B07C5F Taxon classification Animalia Hymenoptera Ichneumonidae Genus Gnathochorisis Foerster , 1869 Gnathochorisis Foerster , 1869: 152. Type species: Gnathochorisis flavipes Foerster , 1871: 113. Blapticus Foerster , 1869: 171. Type species: Blapticus leucostomus Foerster , 1871: 83. Laepserus Foerster , 1869: 205. Type species: Blapticus crassulus Thomson, 1888: 1289. Acroblapticus Schmiedeknecht, 1911: 2173. Type species: Blapticus dentifer Thomson, 1888: 1288. Diagnosis. Body rather stout. Head transverse; clypeus small, weakly to strongly separated from face by a groove; eye large; temple short; malar space with subocular sulcus; occipital carina complete; antenna long, male antenna lacking tyloids. Mesosoma finely or densely punctate on mesoscutum, polished on mesopleuron. Epicnemial carina complete, dorsally distant from anterior margin of mesopleuron; propodeum polished or matt, usually with carinae complete and strong; often propodeal apophyses somewhat developed. Fore wing with areolet present or absent, when present sessile or short petiolate, rectangular. Hind leg as a rule stout, hind femur 2.85-4.9 times as long as high. First metasomal segment with glymma lacking, sternite fused to tergite and reaching 0.5-0.6 of the segment, with spiracle near middle; second tergite matt or polished, sometimes with longitudinal striae; ovipositor upcurved, with a dorsal subapical notch, 0.5-1.1 times as long as hind tibia. Remarks. Medium-sized genus, with 13 described species ( Yu et al. 2012 ). Eight species occur in the Nearctic region and seven in the Palaearctic region (two species are distributed on both continents). Beyond the Holarctic region, one species of Gnathochorisis is known in Mexico ( Dasch 1992 , Humala et al. 2011 ). The genus was also reported from Australia ( Gauld 1984 ), Ecuador, and Central America ( Veijalainen et al. 2012 ). Five species of Gnathochorisis , including two newly described, are presently reported from South Korea here. This is the first record of the genus from this country. In the European part of Russia Gnathochorisis flavipes Foerster was reared from the fungus gnat Neoempheria striata Meigen ( Mycetophilidae : Mycomyinae ) ( Humala 2003 ), other published host records ( Dasch 1992 ) seem to be doubtful. Key to species of Gnathochorisis occurring in South Korea

111621	2
428	4
222324	Gnathochorisis dentifer Thomson
1727	3
1815	Gnathochorisis crassulus Thomson
1289	Gnathochorisis koreensis Humala & Lee, sp. n.
262529	Gnathochorisis flavipes Foerster
21	Gnathochorisis fuscipes Humala & Lee, sp. n.

Figures 1-6. Gnathochorisis fuscipes sp. n. (holotype, female); 1 Habitus, lateral view 2 Head and base of antenna, anterior view 3 Head and mesoscutum, dorsal view 4 Fore wing 5 Hind leg, lateral view 6 Metasoma basal tergites, dorsal view. Scale bars: 1.0 mm (1); 0.5 mm (5); 0.2 mm (2-4, 6). Figures 7-13. Gnathochorisis koreensis sp. n. (holotype, female); 7 Habitus, lateral view 8 Head, anterior view 9 Head and mesoscutum, dorsal view 10 Propodeum, dorsal view 11 Wings 12 Metasoma, basal tergites, dorsal view 13 Hind femur, lateral view. Scale bars: 1.0 mm (7); 0.5 mm (5); 0.2 mm (8-10, 12, 13). Figures 14-18. Gnathochorisis crassulus ; 14 Habitus, lateral view; 15 Head of female, anterior view 16 Fore wing 17 Metapleuron, lateral view 18 Metasoma, first and second tergites, dorsolateral view. Scale bars: 1 mm (14); 0.5 mm (16); 0.2 mm (15, 17, 18). Figures 19-24. Gnathochorisis dentifer ; 19 Habitus, lateral view 20 Head of female, anterior view 21 Areolet of fore wing 22 Metapleuron, lateral view 23 Metasoma, second tergite, lateral view; 24 Metasoma, second to fourth tergites, dorsal view. Scale bars: 1 mm (19); 0.5 mm (21); 0.2 mm (20, 22-24). Figures 25-29. Gnathochorisis flavipes ; 25 Habitus, lateral view 26 Head of female, anterior view 27 Metapleuron, lateral view 28 Wings 29 Metasoma, second tergite, lateral view. Scale bars: 1 mm (25); 0.5 mm (28); 0.2 mm (26, 27, 29).