Plutothrix gribanovi Tselikh, Varkonyi & Dale-Skey, 2022

Tselikh, Ekaterina V., Varkonyi, Gergely & Dale-Skey, Natalie, 2022, Review of the genus Plutothrix Foerster, 1856 (Hymenoptera, Pteromalidae) with a key to Palaearctic species, Journal of Hymenoptera Research 93, pp. 1-32 : 1

Plutothrix gribanovi Tselikh, Varkonyi & Dale-Skey sp. nov.

Figs 18-28

Comparison.

Plutothrix gribanovi is similar to P. canariensis Hedqvist and P. trifasciata (Thomson); the differences between these species are given in the key.

Description.

Female. Body length 4.90-7.20 mm. Fore wing length 3.00-3.90 mm.

Head dark metallic blue; mesosoma metallic green with diffuse coppery lustre; metasoma with Mt2 basally metallic bluish-green, apically yellowish-brown, Mt3, Mt4, sometimes Mt5 yellowish-brown, Mt6-Mt8 dark brown; ovipositor sheath black. Antenna with scape and pedicel yellow, flagellum brown. All coxae metallic green with diffuse coppery lustre; all femora, tibiae and tarsi yellow except last segment yellowish-brown. Fore wing with three or four fuscous clouds, venation yellowish-brown.

Head in dorsal view 2.10-2.20 × as broad as long and 1.25-1.35 × as broad as mesoscutum; in frontal view 1.30-1.40 × as broad as high. POL 0.96-1.00 × OOL. Eye height 1.42-1.45 × eye length and 2.60-2.70 × as long as malar space. Distance between antennal toruli and lower margin of clypeus 0.75-0.76 × distance between antennal toruli and median ocellus. Antenna with scape 0.80-0.85 × as long as eye height and 1.15-1.20 × as long as eye length; pedicel 2.00-2.16 × as long as broad and 0.46-0.52 × as long as F1; combined length of pedicel and flagellum 1.33 × breadth of head; F1 2.85-3.10 × as long as broad, F3-F6 longer than broad; clava 2.35-2.44 × as long as broad.

Mesosoma 1.65-1.70 × as long as broad. Scutellum finely reticulate, 1.0-1.05 × as long as broad. Propodeum without nucha, 0.86-0.90 × as long as scutellum; median carina present; sculpture alutaceous. Metapleuron alutaceous, upper mesepimeron smooth. Fore wing 2.67-2.85 × as long as maximum width; basal cell bare; cubital vein bare; basal vein setose; speculum partly open; PST 0.53-0.66 × as long as M, M 0.78-0.80 × as long as PM and 1.68-1.70 × as long as S.

Metasoma 4.47-5.15 × as long as broad, 1.90-2.02 × as long as mesosoma and 1.45-1.48 × as long as mesosoma and head; Mt2 deeply emarginate medially, Mt8 1.90-2.10 × as long as broad. Ovipositor sheath projecting beyond apex of metasoma.

Male. Body length 3.1-4.0 mm. Fore wing length 2.7-3.1 mm.

Head metallic green with diffuse coppery lustre; metasoma brown with diffuse coppery or metallic green lustre. Fore wing with four fuscous clouds, venation yellowish-brown.

Head in dorsal view 1.20-1.31 × as broad as mesoscutum. Eye height 1.50-1.60 × eye length and 2.10-2.30 × as long as malar space. Distance between antennal toruli and lower margin of clypeus 1.28-1.40 × distance between antennal toruli and median ocellus. Pedicel 1.60-1.63 × as long as broad and 0.30-0.32 × as long as F1; combined length of pedicel and flagellum 2.34 × breadth of head; F1 5.60-7.00 × as long as broad; clava 4.66 × as long as broad.

Metasoma 4.60-5.30 × as long as broad, 1.12-1.16 × as long as mesosoma and 0.86-0.87 × as long as mesosoma and head. Otherwise, similar to female.

Etymology.

The species is named in honour of the senior author’s brother, Sergej Gribanov.

Material examined.

Holotype female (deposited in ZISP): " RUSSIA, Altai Rep., 30 km S Kuray , 31.VII.2007, coll. A. Khalaim ".

Paratypes (ZISP): Russia: Krasnodar Reg. , 1 male, Sochi City, Lazarevskoe , 28.V.1974, coll. Tobias ; 1 female, same locality, 3-6.VI.1974, coll. V. Tobias ; 3 females, same locality, 14-26.VI.1979, coll. Tobias ; 1 female, Sochi City, Golovinka , 9.IV.1975, coll. V. Tobias ; 1 female, Sochi City, Lazarevskoe, Polkovnich’ya balka, 43°53'48"N, 39°21'18"E, 31.VII.2020, coll. Tselikh ; 1 male, Sochi City, Mamedova shchel’, 43°57'11"N, 39°18'27"E, 29.VII.2020, coll. K. Fadeev.

Distribution.

Russia (European part, Western Siberia).

Biology.

Unknown.

Figures

Figures 18 - 28. Plutothrix gribanovi sp. nov., holotype female (18 - 26), paratype male (27, 28) 18 body, dorsal view 19 body, lateral view 20 head, dorsal view 21 head, frontal view 22 wings 23 head and mesosoma, dorso-lateral view 24 mesosoma, dorsal view 25 metasoma, dorsal view 26 antenna 27 body, lateral view 28 fore wing. Scale bars: 2.1 mm (18), 1.1 mm (27).