Elachertus uriliensis, 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 : 23-25

Elachertus uriliensis sp. n.

https://zoobank.org/NomenclaturalActs/ BB21F288-8D66-431E-A6B5-9C060D6EFDFA

Figs 4A–F

TYPE MATERIAL. Holotype: ♀, Amur Province: KhR, 7 km SE Uril, river Dyrovatka , forest, 3–4.VIII.2022, 1 ♀ ( OK) ( ZISP).

DESCRIPTION. Female (holotype). Body length 2.35 mm; fore wing length 1.75 mm.

Colour. Body dark green with bright metallic luster; antenna with scape and pedicel yellow, flagellum dark brown; legs yellow, base of hind coxae green with metallic luster; gaster brownish medially. Wings hyaline, veins pale yellow.

Sculpture. Head, pronotum and mesoscutum rugulose and densely setose. Eyes densely pubescent. Clypeus transversely rugose, occipital margin with weak carina behind posterior ocellus; scutellum and axillae almost smooth with weakly engraved; sides of scutellum, metanotum, propodeum and metasoma smooth.

Head. 1.16 × as broad as mesoscutum, 2.20 × as broad as long; transverse-oval in frontal view, 1.45 × wider than high. POL 2.17 × OOL, OOL as OD. Eyes separated by 0.75 their high. Malar space 0.30 × height of eye. Mouth opening 2.0 × as broad as malar space. Clypeal margin entire. 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 1.88 × as long as pedicel; F1–F4: 2.50, 2.20, 2.20 and 1.60 × as long as broad, respectively; clava two segmented, 1.13 × as log as F1. Funicular segments with numerous decumbent setae.

Mesosoma. 1.80 × as long as broad. Pronotum 0.74 × as broad as mesoscutum, 0.26 × as long as mesoscutum. Mesoscutum transverse, 1.72 × as broad as long, 0.84 × as long as scutellum, with 4 long seta along its posterior margin. Axillae with 7 setae in posterior part ( Fig. 4 E ). Scutellum 1.26 × as long as broad with two pairs of strong, long setae, sublateral grooves smoothly incurved, but not united each other posteriorly; the part between sublateral grooves broader posteriorly, on the whole 1.60 × as long as broad. Dorsellum 0.19 × as long as scutellum, triangular on posterior margin. Propodeum medially 0.68 × as long as scutellum, 3.57 × as long as dorsellum, median carina with distinct short rami, and only a last one reaching posterolateral corner of propodeum, median carina at the anterior margin of propodeum elevated, forming a slot ( Fig.4 E ); callus with many long white setae in several rows. Fore wing 2.29 × as long as broad; costal cell 1.10 × as long as M and 10.0 × as long as broad; ventrally with a two rows of setae; SM dorsally with 8 setae; M 2.33 × as long as ST; PM 1.27 × as long as ST, and 0.54 × as long as M; basal cell delineated by complete rows of setae and with 4 seta mesally near SM; speculum very narrow almost absent ( Fig. 4B ). Hind wing 3.80 × as long as broad, rounded at apex.

Metasoma. Petiole 1.50 × as broad as long with parallel sides, broadly expanded posteriorly with irregular transverse ridge or carina. Gaster long ovate, pointed, 2.40 × as long as broad, 1.06 ×as long as mesosoma, 0.83 × as long as head plus mesosoma, and 0.80 × as broad as mesosoma.

Male. Unknown.

DIFFERENTIAL DIAGNOSIS. Elachertus uriliensis sp. n. is similar to E. sobrinus Zhu et Huang, 2001 by the clypeal margin entire, pronotum without transverse anterior carina ( Fig. 4 C ), rami of propodeal carina distinct and only a last one reaching posterolateral corner of propodeum. The new species differs from E. sobrinus in having the sublateral grooves on scutellum, with distance between each other more than width of grooves ( Fig. 4 E ) (distance between grooves on scutellum around width of grooves in E. sobrinus [ Zhu & Huang, 2001: P. 333]), setae on thorax whitish ( Figs 4 A–F ) (yellowish brown in E. sobrinus [see ibid]), scutellum weakly engraved ( Fig. 4 E ) (reticulate all over in E. sobrinus [see ibid]). The new species is also similar to E. oligiramus by the unique features in having several setae on the axilla ( Zhu & Huang, 2001: P. 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 village of Uril .

REMARKS. Elachertus khingansis sp. n. and E. uriliensis sp. n. can be attributed to the australis species group, designated by Bouček (1988), by the clypeus below abruptly receding into a narrow marginal lamina which is often incised in middle, mesoscutum with numerous setae and axilla not advanced. Also, according to Zhu & Huang (2001), species of the australis species group are characterized by sublateral grooves on scutellum incurved, but never united posteriorly; propodeal median carina branched, with distinct rami.

Figures

Fig. 4. Elachertus uriliensis sp. n. (♀, holotype). A – habitus, lateral view; B – habitus, dorsal view; C – head, pronotum and mesoscutum, dorsal view; D – head, frontal view; E – mesosoma, dorsal view; F – head with mesosoma, latero-ventral view.