Eunotus caeruleus Kang & Hu, 2025

Eunotus caeruleus Kang & Hu sp. nov.

Fig. 2 A – F View Figure 2

Type material.

Holotype. • ♀, point-mounted, China, Xinjiang, Ruoqiang County, Altun Mountain Nature Reserve , 38°4'22.5288"N, 89°7'10.7472"E, Altitude: 3681.55 m, 13.VII.2020, Coll. Ning Kang by sweeping net GoogleMaps . Paratypes. • 1 ♀, 1 ♂, card mounted, same data as holotype except 15.VII.2020 GoogleMaps ; • 3 ♀♀, 5 ♂♂, card mounted, 16.VII.2021. Coll. Shun-Gang Luo, Ning Kang, Hong-Ying Hu GoogleMaps (All deposited in ICXU).

Description.

Female. Length 1.3 mm. Body dark blue (Fig. 2 A View Figure 2 ), eyes dark red, antenna dark brown. Legs with all coxae same color as the body; femora and tibiae dark brown, except trochanter and their apices deep yellow, forewing transparent covered densely with setae (Fig. 2 D View Figure 2 ).

Head, distinct inverted triangle, in frontal view 1.45 × as broad as high (Fig. 2 B View Figure 2 ), the inner margin of the compound eye curved outward, eye height 0.61 × as long as interocular distance, 0.85 × as long as scape. Clypeus margin straight, without tooth, mandible bidentate, dark yellow. Antenna located before the lower eye margin and the distance from median ocellus by 3.96 × height of the distance from clypeus margin, scape not reaching anterior ocellus, pedicel short and square, 0.6 × as long as F 1; F 1 - F 4 all longer than width, funicle length 1.5 × as long as width, each funicle segment with two rounds of dark plate-shaped sensilla; clava shorter than the combined length of the last two funicle segments, 3.35 × as long as broad; length of flagellum and pedicel combined longer than head width (0.9 ×). Head in dorsal view 3.18 × as broad as long, POL 4.2 × OOL.

Mesosoma not distinctly convex, covered with reticulated and dense engraving, notauli distinct and complete (Fig. 2 C View Figure 2 ). Pronotum 0.7 × as long as mesoscutum length, anteriorly not margined; scutellum 0.6 × as long as mesoscutum, frenal line absent. Propodeum 0.35 × as long as scutellum, reticulation irregular, the rear of both sides protruded, nucha short (Fig. 2 E View Figure 2 ). Forewing 2.2 × as long as broad, covered with dense setae, without speculum and marginal fringe, marginal vein 1.04 × as long as postmarginal vein, postmarginal vein 1.15 × as long as stigmal vein, the angle between stigmal vein and postmarginal vein 40 ° (Fig. 2 D View Figure 2 ).

Gaster 1.6 × as long as broad, shorter than the combined length of head and mesosoma, Gt 1 distinctly longer than other tergites, 0.56 × as long as the gaster, smooth without distinct markings (Fig. 2 E View Figure 2 ).

Male. Length 1.0 ± 0.2 mm, N = 5 (Fig. 2 F View Figure 2 ), similar to female in body color and habitus, but differs as follows. The last two flagella significantly shorter than the first two funiculus, square and short. Gaster short and flat.

Host.

Unknown.

Etymology.

“ caeruleus ” means dark blue, signifying the dark blue body color of the female species.

Diagnosis.

The new species is morphologically similar to E. parvulus , but distinctly different in several key traits: the body color of the latter is dark green and gaster dark brown, while the color of new species is dark blue; POL: OOL of the latter is 4.5 while the new species is 4.2; pedicel 2 × as long as width, longer than F 1, and significantly longer than the new species; all funicle segments broader than long and transverse while for the new species they are obviously longer than width; clava 2 × as long as broad, obviously shorter than the new species; propodeum with complete median carina and costulae, while the new species is covered with irregular reticulation; and Gt 1 0.86 × as long as gaster, significantly longer than the Gt 1 of the new species.