Toxeuma leleji Tselikh, 2021

Tselikh, Ekaterina V. & Dale-Skey, Natalie, 2021, Review of the genus Toxeuma Walker, 1833 (Hymenoptera, Pteromalidae) from Russia, with a key to Palaearctic species, Journal of Hymenoptera Research 84, pp. 391-403 : 391

Toxeuma leleji Tselikh sp. nov.

Figs 15-21

Comparison.

Toxeuma leleji is similar to T. acilius (Walker) and T. paludum Graham; the differences between these species are given in the key.

Females of Toxeuma leleji are also similar to those of the Nearctic species Toxeuma inopinum Heydon because they have an antennal clava with needle-like spicula, F1-F4 elongate, fore wing with pilose basal vein, but Toxeuma leleji females have the gena not distinctly hollowed at mouth corner, petiole longer than wide, Mt2 0.85-0.9 times median length of metasoma.

Description.

Female. Body length 1.5 mm. Fore wing length 1.5 mm.

Head, mesosoma and metasoma, metallic bluish-green with diffuse coppery lustre; antenna with scape yellow, pedicel yellowish-brown, flagellum brown; all coxae metallic bluish-green with diffuse coppery lustre; all femora, tibiae and tarsi yellow except last segment yellowish-brown; fore wing hyaline, venation yellowish-brown; ovipositor sheath black.

Head in dorsal view 1.93-2.07 times as broad as long and 1.36-1.38 times as broad as mesoscutum; in frontal view 1.28-1.3 times broader than high. POL 1.46-1.57 times OOL. Eye height 1.21-1.26 times eye length and 2.90-2.92 times as long as malar space. Distance between antennal toruli and lower margin of clypeus 0.75 times distance between antennal toruli and median ocellus. Clypeus alutaceous, its lower margin slightly arched. Antenna with scape 0.92-0.96 times as long as eye height and 1.12-1.22 times as long as eye length; pedicel 1.61-1.66 times as long as broad and 1.40-1.42 times as long as F1; combined length of pedicel and flagellum 1.10-1.14 times breadth of head; flagellum almost filiform; F1-F3 longer than broad, F4-F5 subquadrate, F6 transverse (on dry material) and F1 longer than broad, F2-F3 subquadrate, F4-F6 transverse (on slide); clava 2.83-2.86 times as long as broad (on dry material) and 2.58 times (on slide).

Mesosoma 2.20-2.45 times as long as broad. Scutellum finely reticulate, 1.0-1.1 times as long as broad. Propodeum medially as long as scutellum; median carina and plicae present; sculpture reticulate with irregular rugae; nucha short and weakly reticulate. Sculptured part of petiole 1.17-1.25 times as long as broad, with irregular sculpture. Fore wing 2.34-2.89 times as long as maximum width; basal cell bare; basal vein pilose; speculum partly open; M 1.16-1.22 times as long as P and 1.95-2.00 times as long as S.

Metasoma ovate, 1.50-1.64 times as long as broad and 0.40-0.45 times as long as mesosoma and head together; Mt2 0.85-0.90 times median length of metasoma. Ovipositor sheath projecting slightly beyond apex of metasoma.

Etymology.

The species is named in honour of the prominent entomologist, an expert on Mutillidae ( Hymenoptera ), Prof. Arkady S. Lelej.

Material examined.

Holotype female (ZISP): Russia: Sakhalin Prov., Kunashir Island, Golovnina Volcano , 27.VII.1981, coll. E. Sugonyaev.

Paratype female (ZISP): same data as holotype.

Distribution.

Russian Far East (Sakhalinskaya Prov.).

Figures

Figures 10 - 21. Toxeuma fuscicorne non-type female (10 - 14) 10 body, lateral view 11 metasoma, dorsal view 12 scutellum, propodeum and petiole, dorsal view 13 F 6 and antennal clava (slide) 14 antenna (slide) Toxeuma leleji sp. nov. holotype female (15, 16, 18 - 20) paratype female (17, 21) 15 body, lateral view 16 fore and hind wings 17 antennal clava (slide) 18 metasoma, dorsal view 19 propodeum and petiole, dorsal view 20 head, frontal view 21 antenna (slide) Scale bars: 1.0 mm.