Elachertus khingansis, Kosheleva, 2024

Kosheleva, O. V., 2024, Eulophid wasps of the subfamily Eulophinae (Hymenoptera: Chalcidoidea) from the Khingan Reserve (Amur Province, Russia), with the descriptions of new species, Far Eastern Entomologist 493, pp. 14-31 : 20-22

Elachertus khingansis sp. n.

https://zoobank.org/NomenclaturalActs/ D6C34890-0494-4259-A190-BE25DD7CDD04

Figs 3A–F

TYPE MATERIAL. Holotype: ♀, Russia: Amur Province, KhR, 7 km SE Uril, river Dyrovatka , forest, 3–4.VIII.2022 ( OK) ( ZISP).

DESCRIPTION. Female (holotype). Body length 1.95 mm; fore wing length 1.40 mm.

Colour. Body metallic dark green; face and vertex with coppery luster, scape pale yellow; pedicel and flagellum yellowish brown; legs yellowish, except base of coxae infuscate; gaster mainly brown, greenish laterally. The pubescens of body whitish; wings hyaline, veins pale yellow.

Sculpture. Head, pronotum and mesoscutum reticulate-rugulose, densely setose; lower face and malar space finely reticulate, clypeal margin with transverse rugae; occipital carina sharp; pronotum with transverse carinae or rugae; scutellum with isodiametric, engraved reticulations; axillae very finely and dense coriaceous; metanotum, propodeum and metasoma smooth.

Head. 1.09 × as broad as mesoscutum in dorsal view, 2.20 × as broad as long; transverse-oval, 1.28 × wider than high, in frontal view. POL 1.71 × OOL, OOL 1.16 × OD. Eyes separated by distance their high, densely setose. Malar space 0.27 × height of eye. Mouth opening 2.0 × as broad as malar space. Clypeus with marginal lamina bilobed. Antennal scape not reaching median ocellus; scape slender, 5.0 × as long as broad; pedicel dorsally 2.0 × as long as broad; funicle with one anellus and four funicular segments, decrease in length; F1 1.20 × as long as pedicel; F1–F4: 2.20, 1.80, 1.60 and 1.30 × as long as broad, respectively; clava two segmented, 1.45 × as log as F1. Funicular segments with numerous decumbent setae.

Mesosoma. 1.60 × as long as broad (dorsal view). Pronotum with indistinct transverse carina medially ( Fig 3C ), 0.25 × as long as mesoscutum, 0.75 × as broad as mesoscutum. Mesoscutum 1.91 × as broad as long, 0.92 × as long as scutellum, with 4 long seta along its posterior margin ( Fig. 3F ). Scutellum 1.19 × as long as broad with two pairs of long setae, sublateral grooves smoothly incurved, but not united each other posteriorly; the part between sublateral grooves broader posteriorly, on the whole 1.39 × as long as broad. Dorsellum smooth, rectangular on posterior margin. Propodeum medially 0.53 × as long as scutellum, median carina with distinct short rami all its along, anterior margin in the middle elevated, forming a slot between the marginal and the dorsellum; callus with 13 long setae in two rows. Fore wing 2.23 × as long as broad; costal cell as long as M and 8.0 × as long as broad; ventrally with a complete row of setae; SM dorsally with 7 setae; M 3.08 × as long as SM; PM 1.38 × as long as ST and 0.45 × as long as M; basal cell delineated by complete rows of setae and with one seta mesally near SM; speculum small, not reaching to base of M, closed below. Hind wing 4.29 × as long as broad, rounded at apex.

Metasoma. Petiole transverse, smooth and conical. Gaster long-ovate, pointed, 2.0 × as long as broad, 1.05 × as long as mesosoma, 0.83 × as long as head plus mesosoma, and 0.80 × as broad as mesosoma; first gastral tergite occupying more than half length of gaster. ( Fig. 3A, B ).

Male. Unknown.

DIFFERENTIAL DIAGNOSIS. Elachertus khingansis sp. n. is close to E. ramosus Zhu et Huang, 2001 by the clypeal margin bilobed, the sublateral grooves on scutellum not united posteriorly, median carina on propodeum with short rami, F1 longer than broad, speculum narrow or absent, also body dark green. The new species differs from E. ramosus in having the gaster long-ovate, pointed apically ( Fig. 3 B ) (gaster subrotund with apex not acute in E. ramosus [ Zhu & Huang, 2001: P 333]), first gastral tergite brownish, occupying more than half length of gaster ( Fig. 3A, B ) (first gastral tergite dark green with sub-basal pale patch, less than 1/3 length of gaster in E. ramosus [ Zhu & Huang, 2001: P. 333]), clava two segmented, 1.45 × as long as F1 ( Fig. 3 C, D ) (three segmented, as long as F 1 in E. ramosus [ Zhu & Huang, 2001: P 342, Fig. 159]), POL 1.71 × OOL (1.33 in E. ramosus [ Zhu & Huang, 2001: P 333]), PM 0.45 × as long as M (0.79 in E. ramosus [see ibid]); setae scattered all over surface of mesoscutum (3 A, B, F) (only on mid lobe mesoscutum in E. ramosus [see ibid]), axillae without additional setae ( Fig. 3E ) (with indistinct setae in E. ramosus [ Zhu & Huang, 2001: P 323]).

The new species is also similar to E. oligiramus Zhu et Huang, 2001 by the clypeal margin bilobed, but differs by the absence of setae on axilla [3 F] (present in E. oligiramus [ Zhu & Huang, 2001: P. 329]), median carina with distinct short rami all its along ( Fig. 3 B, E ) (rami of propodeal median carina present only medially in E. oligiramus [ Zhu & Huang, 2001: P. 323, P 342, Fig. 147]) and dark metallic green ( Figs 3 A–F ) (bright metallic green in E. oligiramus [ Zhu & Huang, 2001: P. 323, 329])

DISTRIBUTION. Amur Province

HOSTS. Unknown

ETYMOLOGY. The name of this species is an adjective referring to the area where the holotype was collected, the area of the Khingan Reserve .

Figures

Fig. 3. Elachertus khingansis sp. n. (♀, holotype). A – habitus, lateral view; B – habitus, dorsal view; C – head with pronotum, lateral view; D – head, frontal view; E – head with mesosoma, dorsal view; F – head, pronotum and mesonotum, dorso-lateral view.