Review of the genus Plutothrix Foerster, 1856 (Hymenoptera, Pteromalidae) with a key to Palaearctic species Author Tselikh, Ekaterina V. https://orcid.org/0000-0002-9184-043X Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia tselikhk@gmail.com Author Varkonyi, Gergely https://orcid.org/0000-0002-7977-2753 Finnish Environment Institute, Biodiversity Centre, Lentiirantie 342 B, FI- 88900 Kuhmo, Finland gergely.varkonyi@ymparisto.fi Author Dale-Skey, Natalie https://orcid.org/0000-0001-7582-0386 Natural History Museum, London, UK n.dale-skey@nhm.ac.uk text Journal of Hymenoptera Research 2022 2022-10-31 93 1 32 http://dx.doi.org/10.3897/jhr.93.86238 journal article http://dx.doi.org/10.3897/jhr.93.86238 1314-2607-93-1 42FFC606F2104BAAADF5A9197F4B970B F3DD81DA3BF154D3B803E87DAA4FA018 Plutothrix zerovae Tselikh, Varkonyi & Dale-Skey sp. nov. Figs 87-94 Comparison. Plutothrix zerovae is similar to P. kuboi Kamijo, 2004; the differences between these species are given in the key. Description. Female. Body length 5.60-6.50 mm. Fore wing length 4.10-4.50 mm. Head, mesosoma and Mt2-Mt6 metallic bluish-green with diffuse coppery lustre, Mt8 brown; ovipositor sheath black. Antenna with scape yellow, pedicel yellowish-brown, flagellum brown. All coxae metallic green with diffuse coppery lustre; all femora, tibiae and tarsi yellow except last segment yellowish-brown. Fore wing hyaline with one fuscous cloud touching stigma, venation yellowish-brown. Head in dorsal view 2.10-2.26 x as broad as long and 1.16-1.19 x as broad as mesoscutum; in frontal view 1.24-1.26 x as broad as high. POL 0.90-1.00 x OOL. Eye height 1.43-1.46 x eye length and 2.10-2.22 x as long as malar space. Distance between antennal toruli and lower margin of clypeus 0.58-0.65 x distance between antennal toruli and median ocellus. Antenna with scape 0.85-0.89 x as long as eye height and 1.20-1.30 x as long as eye length; pedicel 2.00-2.07 x as long as broad and 0.72-0.80 x as long as F1; combined length of pedicel and flagellum 1.12-1.18 x breadth of head; F1 2.20-2.35 x as long as broad, F3-F6 longer than broad; clava 2.45-2.60 x as long as broad. Mesosoma 1.55-1.60 x as long as broad. Scutellum finely reticulate, 1.18-1.20 x as long as broad. Propodeum without nucha, 0.86-0.90 x as long as scutellum; median carina present; sculpture weakly reticulate. Metapleuron reticulate, upper mesepimeron alutaceous. Fore wing 2.50-2.70 x as long as maximum width; basal cell, cubital vein, basal vein setose; speculum closed; PST 0.75-0.86 x as long as M, M 0.74-0.76 x as long as PM and 1.80-1.93 x as long as S. Metasoma 4.30-4.40 x as long as broad, 1.80-1.95 x as long as mesosoma and 1.45-1.56 x as long as mesosoma and head; Mt2 emarginate medially, Mt8 2.20-2.50 x as long as broad. Ovipositor sheath projecting beyond apex of metasoma. Male unknown. Etymology. The species is named in honour of the prominent entomologist, Dr M.D. Zerova (1934-2021), an expert on Eurytomidae , Torymidae and Ormyridae ( Hymenoptera ). Material examined. Holotype female (ZMUH): Finland : "Suomi, ES, Mikkelin mlk., 6830:501, 05.07.1987 , leg. M. Koponen ", " Plutothrix coelius (Walker) det. M. Koponen ", " Holotype Plutothrix zerovae sp.n. Tselikh" . Paratypes . Finland (all in ZMUH): N , 1 female , "Suomi, Kauniainen , 09.07.1946 , leg. A. Saarinen "; Ta , 1 female , " Suomi , EH, Luopioinen, 07.08.1976 , leg. E. Kangas "; 1 female , "Suomi, EH, Luopioinen, 21.07.1956 , leg. E. Kangas ", " Plutothrix coelius (Walker) det. M. Koponen "; 1 female , " Finland , Loppi, 03.07.1937 , leg. C. Ahnger "; Sa , 1 female , " Finland , Ristiina, 6826:502, 28.06.1992 , leg. M. Koponen ", " Plutothrix coelius (Walker) det. M. Koponen "; 1 female , "Suomi, ES, Ristiina, 6826:502, 08.07.1978 , leg. M. Koponen ", " Plutothrix coelius (Walker) det. M. Koponen "; 1 female , " Suomi , ES, Mikkelin mlk, 6830:501, 03.09.1974 , leg. M. Koponen ", " Plutothrix coelius (Walker) det. M. Koponen "; 1 female , " Finland , Ristiina, 6826:502, 03.07.1995 , leg. M. Koponen "; Tb , 1 female , "Jyvaeskylae , Hellen , 208"; Kb , 1 female , "Suomi, PK, Tohmajaervi , 6908:660, 18.07.1982 , leg. M. Koponen " . Russia : (ZMUH) Leningrad Prov. , 1 female , "Viipuri, Linnaniemi, 610, MUS., ZOOL. UNIV. TURKU"; (ZISP) Smolensk Prov. , 1 female , near Smolensk City , 54°49'01"N , 32°04'50"E , 22.VIII.2020 , coll. S Belokobylskij. Figures 87-94. Plutothrix zerovae sp. nov., holotype female ( 87-94 ) 87 body, lateral view 88 head and mesosoma, dorsal view 89 head, frontal view 90 head, dorsal view 91 mesosoma, lateral view 92 antenna 93 body, dorsal view 94 wings. Scale bar: 2.1 mm ( 87 ). Figures 95-97. Plutothrix transdanuviana ( Erdos , 1946) syn. nov. to Seladerma antennatum (Walker, 1833), holotype female ( 95-97 ) 95 body, dorsal view 96 head and antenna, dorsal view 94 fore wing. Scale bar: 0.75 mm ( 95 ). Distribution. Finland, Russia (European part of Russia). Biology. Unknown.