Aprostocetus (Ootetrastichus) kostjukovi Kosheleva, 2025

Aprostocetus (Ootetrastichus) kostjukovi Kosheleva , sp. n.

https://zoobank.org/NomenclaturalActs/ F200DA13-7F8F-41E2-B487-D1E61DE1C445

Figs 12–16 View Figs 12–16

TYPE MATERIAL. Holotype – ♀, Russia: Amur Prov.: KhR, 24 km W Arkhara, сordon Kleshinskoe ozero, forest, 12–14.VIII.2022, OK (antenna, permanent slide, no. 158) [ ZISP] . Paratype: same locality as holotype, 1♀ (VCh) [ ZISP] .

DESCRIPTION. FEMALE. Body length 2.07–2.09 mm. Body dark green-blue with dull metallic luster; base of gaster pale yellow; mouth-edge testaceous. Scape and pedicel yellow, flagellum brown. Legs yellow, except mid coxae brownish at base, hind coxae concolorous with mesosoma. Tegulae yellow. Wings hyaline, venation pale yellowish.

Head 1.18–1.22 times as broad as mesoscutum, 2.00–2.22 times as broad as long (in dorsal view); 1.30–1.34 times as broad as height; temples about 0.22–0.24 length of eyes (dorsal view); POL 1.10 OOL; OOL 2.30–2.50 OD. Frons with median line. Eyes 1.80–1.84 times as long as broad (in dorsal view), 1.13–1.16 times as height as broad (in lateral view), separated by 1.46–1.55 times their own height (in frontal view). Malar space 0.63–0.70 height of eye, malar sulcus very slightly curved. Mouth 1.40–1.43 times malar space. Antenna ( Fig. 16 View Figs 12–16 ) with scape 1.04–1.10 height of eye, reaching vertex, 4.0–4.4 as long as broad; pedicel plus flagellum 1.46–1.66 times breadth of mesoscutum; pedicel twice as long as broad and 0.83 as long as F1; funicle proximally about as stout as pedicel, its segments decreasing in length, F1 2.5–2.6 times, F2 2.43 times, F3 1.79 times as long as broad, clava slightly broader than F3, 0.9–1.05 times as long as F2 plus F3, 2.89–3.93 times as long as broad.

Mesosoma 1.77–1.86 times as long as broad. Pronotum subconical, 0.50 as long as mesoscutum. Mid lobe of mesoscutum 1.05–1.11 as long as broad, with superficial reticulation; median line absent; 3 adnotaular setae on each side. Scutellum 0.67– 0.71 times as long as mesoscutum, 1.30–1.33 times as broad as long; submedian lines distinctly nearer to sublateral lines than to each other, enclosing a space 2.00 times as long as broad, anterior pair of setae slightly before the middle. Dorsellum 2.00– 2.14 times as broad as long, shiny, with superficial reticulation. Lateral lobes of metanotum with a row of foveae along anterior margin ( Fig. 12 View Figs 12–16 ). Propodeum medially 1.20 times as long as dorsellum; with weak, superficially reticulate sculpture; anterior part of median carina in groove, posterior part, near propodeal foramen, raised, spiracles circular, separated by their diameter from metanotum, their outer rim covered by a raised flap of the callus; callus with 2 setae. Fore wing ( Fig. 14 View Figs 12–16 ) 2.75– 2.80 times as long as broad; reaching well beyond tip of gaster, with apical margin rounded; costal cell 0.80–0.94 times as long as M, 14 times as long as broad; SM with 3 dorsal seta; M 5.10–6.25 times length of ST, its front with 14 setae; speculum small, closed below; cilia of apical margin about 0.63–0.71 length of ST. Hindwing slightly pointed, 5.56–6.07 times as long as broad, cilia 0.33–0.35 breadth of wing.

Metasoma. Gaster ( Fig. 15 View Figs 12–16 ) longitudinal-oval, acuminate, 2.02–2.30 times as long as broad, 1.40–1.44 times as long as mesosoma; last tergite as long as broad; longest seta of each cercus about 2.22–2.25 length of next longest seta, curved; ovipositor sheaths slightly projecting; tip of hypopygium at 0.5 length of gaster.

MALE. Unknown.

COMPARATIVE DIAGNOSIS. In addition to the features mentioned in the key below, A. kostjukovi sp. n. is differs from A. (O.) vasilisae sp. n. and A. (O.) walkeri sp. n. in having a face with median line on the frons, mid lobe of mesoscutum with 3 adnotaular setae on each side, and propodeum with anterior part of median carina in groove, posterior part, near propodeal foramen, raised; the outer rim of spiracles covered by a raised flap of the callus. In addition, A. kostjukovi sp. n. has a unique structure of the metanotum, its lateral lobes with a row of foveae along the anterior margin ( Fig. 12 View Figs 12–16 ).

HOSTS. Unknown.

ETYMOLOGY. Named after Victor V. Kostjukov, who contributed greatly to the study of the subfamily Tetrastichinae in the Russian Far East.

Aprostocetus (Ootetrastichus) vasilisae Kosheleva , sp. n. https://zoobank.org/NomenclaturalActs/ 412C5F27-6AF4-4385-910B-278B5551CE32

Figs 17–22 View Figs 17–22

TYPE MATERIAL. Holotype, female: Russia: Amur Prov., KhR, 24 km W Arkhara, сordon Kleshinskoe ozero, forest, 12–13.VIII 2022 (VCh) (antenna, permanent slide, no. 151) ( ZISP).

DESCRIPTION. FEMALE (holotype). Body length 1.39 mm. Mesosoma bright green-blue; head with yellow-brownish regions. Prepectus brownish with weak metallic tinge. Base of gaster pale yellow, rest of the gaster brownish with green metallic luster. Antennae pale yellow. Legs pale yellow, except hind coxae concolorous with mesosoma. Tegulae yellow. Wings hyaline, venation pale yellowish.

Head 1.23 times as broad as mesoscutum, twice as broad as long (in dorsal view); 1.19 times as broad as height; temples about 0.19 length of eyes; POL 1.29 OOL, OOL 2.33 OD. Frons without median line. Vertex with sparse long setae. Eyes 2.29 times as long as broad (in dorsal view), 1.06 times as height as broad (in lateral view), separated by 1.22 times their own height (in frontal view). Malar space 0.56 height of eye, malar sulcus straight. Mouth 1.63 times malar space. Antenna ( Fig. 22 View Figs 17–22 ) with scape, 4.00 times as long as broad, as height as eye, reaching well above vertex; pedicel plus flagellum 1.61 times breadth of mesoscutum; pedicel 2.40 times as long as broad and 0.94 as long as F1; funicle proximally about as stout as pedicel, its segments decreasing in length, F1 2.29 times, F2 2.04 times, F3 1.79 times as long as broad, clava 2-segmented, slightly broader than F3, 0.98 times as long as F2 plus F3; 3.20 times as long as broad.

Mesosoma 1.73 times as long as broad. Pronotum ( Fig.19 View Figs 17–22 ) subconical, 0.40 as long as mesoscutum. Mid lobe of mesoscutum 1.10 times as long as broad, shiny, with superficial engraved reticulation; median line absent; 2 long adnotaular setae on each side. Scutellum, moderately convex, 0.73 times as long as mesoscutum, 1.21 times as broad as long; submedian lines about equidistant from each other and from sublateral lines, enclosing a space 2.50 times as long as broad, anterior pair of setae behind the middle of scutellum. Dorsellum 1.83 times as broad as long, shiny, almost smooth. Propodeum medially as long as dorsellum; surface shiny, smooth; median carina expanded in posterior part; spiracles small, circular, separated by their diameter from metanotum; callus with 2 setae. Forewing 2.67 times as long as broad; costal cell 0.83 times as M; SM with 2 dorsal setae; M 4.37 times length of ST; its front with 10 setae; speculum absent, cilia of apical margin about 0.67 length of ST. Hindwing pointed, 8.00 times as long as broad; cilia 0.80 breadth of wing.

Metasoma. Gaster longitudinal-oval, 1.35 times as long as thorax, 2.32 times as long as broad; last tergite 1.17 times as long as broad; longest setae of each cercus 2.0 times length of next longest, curved; ovipositor sheaths only slightly projecting; tip of hypopygium at 0.5 length of gaster.

MALE. Unknown.

COMPARATIVE DIAGNOSIS. In addition to the features mentioned in the diagnosis of A. (O.) kostjukovi sp. n. and the key below, A. (O.) vasilisae sp. n. is similar to A. (O.) mycerinus by the scutellum, moderately convex, with submedian lines about equidistant from each other and from sublateral lines, and anterior pair of setae behind the middle of scutellum. A. (O.) vasilisae sp. n. and A. (O.) kostjukovi sp. n. are also similar to A. (O.) microocellus Kostjukov, 1995 by the pale yellow base of the gaster, propodeum medially as long as dorsellum, callus with 2 setae and yellow legs. Both new species differ from A. (O.) microocellus in having a longer clava and a shorter female gaster.

HOSTS. Unknown.

ETYMOLOGY. Named after collector of type specimen, Vasilisa G. Chemyreva ( ZIN RAS, St. Petersburg) .