Nazgulia petiolata Hedqvist, 1973

Tselikh, Ekaterina V., Lee, Jaehyeon & Ku, Deok-Seo, 2024, A taxonomic study of four rare pteromalid genera: Amblyharma Huang & Tong, Fusta Xiao & Ye, Nazgulia Hedqvist and Platecrizotes Ferriere from the Eastern Palaearctic (Chalcidoidea, Pteromalidae, Pachyneurinae), ZooKeys 1189, pp. 349-363 : 349

Nazgulia petiolata Hedqvist, 1973

Figs 13 , 14-17

Nazgulia petiolata Hedqvist, 1973: 240. Holotype female (NMP, examined).

Type material.

Holotype: female, "Nrk. Asbro 25/5 1950 K: J. Hedqvist", "HOLOTYPUS Nazgulia gen.n. Nazgulia petiolata sp.n. ♀ K-J Hedqvist det. 1973", " NHRS-HEVA 000002235" (NHRS).

Additional material examined.

Russia: 1 female, " Sakhalin Prov., Sokol Vill., 7-9.VII.2011, E. Tselikh and D. Rachin " (ZISP) .

Description.

Female. Body length 2.70-3.5 mm; fore wing length 1.90-2.10 mm.

Coloration. Head, mesosoma and propodeum dark blue-green or black with metallic diffuse coppery lustre. Antenna with scape, pedicel and flagellum brown. All coxae dark blue-green or black with metallic diffuse coppery lustre; all femora dark brown with metallic blue-violet lustre; all tibiae and tarsi yellowish-brown. Fore wing hyaline, venation yellowish-brown. Metasoma dark brown partially with metallic blue-violet lustre; ovipositor sheaths black.

Sculpture. Head reticulate; clypeus and malar space radially striate. Mesosoma, propodeum with nucha and petiole reticulate. Metasoma weakly alutaceous and shiny.

Head. Head in dorsal view 2.17-2.19 times as broad as long and 1.19-1.20 times as broad as mesoscutum; in frontal view 1.20-1.22 times as broad as high. POL 1.00-1.09 times as long as OOL. Eye height 1.50 times eye length and 1.40-1.60 times as long as malar space. Distance between antennal toruli and lower margin of clypeus 0.60-0.64 times distance between antennal toruli and median ocellus. Antenna with scape 0.87-0.90 times as long as eye height and 1.30-1.40 times as long as eye length; pedicel 1.60-1.42 times as long as broad and 1.70-2.70 times as long as F1; combined length of pedicel and flagellum 0.85-0.90 times breadth of head; F1 transverse, F2 1.14-1.25 times as long as broad, F3-F6 subquadrate, all with 1 row of sensilla; clava 2.00-2.30 times as long as broad, with small micropilosity area on C3 and C4.

Mesosoma. Mesosoma 1.84-1.89 times as long as broad. Pronotum 0.65-0.80 times as long as mesoscutum. Scutellum 0.85-0.90 times as long as broad. Propodeum medially 0.60-0.73 times as long as scutellum; nucha 0.40 times length of propodeum. Fore wing 2.32 times as long as its maximum width; basal cell partly or wholly pilose, cubital vein and basal vein pilose; speculum closed below; M 0.84-0.90 times as long as PM and 1.33-1.35 times as long as S.

Metasoma. Metasoma 2.60-2.90 times as long as broad, 1.28-0.96 times as long as mesosoma and 0.76-1.00 times as long as mesosoma and head (metasoma is deformed in the specimens studied so the measurements are approximate). Petiole 1.75-2.00 times as long as broad. Mt2 0.20 times median length of metasoma; Mt8 1.15-1.20 times longer than maximum width. Ovipositor sheath projecting beyond apex of metasoma.

Male. Not studied.

Remarks.

One characteristic of this species is that the antenna has two anelli, but there is a tendency towards reduction in the size of F1 in some Palaearctic specimens (see Bouček and Rasplus 1991 and Fig. 17 ).

Distribution.

Netherlands, Sweden, Russia (Far East).

Figures

Figures 8 - 13. 8 - 12 Fusta wuhuica Xiao & Ye, 2015, female, holotype 8 head, dorsal view, mesosoma and metasoma, lateral view 9 head, dorsal view and mesosoma, lateral view 10 habitus, dorso-lateral view 11 head, frontal view 12 fore wing 13 Nazgulia petiolata Hedqvist, 1973, female, holotype, habitus, lateral view.

Figures 14 - 19. 14 - 17 Nazgulia petiolata Hedqvist, 1973, female, non-type 14 habitus, lateral view 15 fore wing 16 habitus, dorsal view 17 head, frontal view 18, 19 Platecrizotes europaeus Boucek, 1964, female, holotype 18 habitus, lateral view 19 fore wing.