Aneuclis flavopedes Sheng, Zhou & Wei, 2021

Wei, Ya-Wei, Zhou, Yong-Bin & Sheng, Mao-Ling, 2021, First record of the genus Aneuclis Förster (Hymenoptera, Ichneumonidae) from China, Zootaxa 4908 (2), pp. 292-296 : 293-295

Aneuclis flavopedes Sheng, Zhou & Wei , sp. nov.

( Figs 1–10 )

Material examined. Holotype, Female, CHINA: Aerxiang, 273 m, Zhangwu , Liaoning Province, 18 June 2020, Ya-Wei Wei (IT).

Diagnosis. Head and mesosoma almost entirely leathery texture. Clypeus smooth, shiny. Malar space 1.2 × as long as basal width of mandible. Occipital carina ( Fig. 4 ) complete. Speculum ( Fig. 6 ) absent. 2m-cu slightly basal of rs-m. Median longitudinal carina between anterior margin and area superomedia 0.25 × as long as combined area of area superomedia and area petiolaris ( Fig. 7 ). Metasomal tergites smooth, shiny. Tergite I ( Figs 8, 9 ) about 3.4 × as long as apical width. Subapical portion of lower valve ( Fig. 10 ) with 3 weak edges. Tergite II red brown, lateral portions of subsequent tergites yellowish brown.

Description. Holotype, female ( Fig. 1 ). Body length approximately 2.9 mm. Fore wing length about 2.5 mm. Ovipositor sheath about 1.7 mm.

Head. Inner margins of eyes almost parallel. Face ( Fig. 2 ) slightly evenly convex, 2.3 × as wide as long, with even leathery texture and opalescent hairs; upper median portion smooth, shiny. Clypeal sulcus vague. Clypeus 2.9 × as wide as long, smooth, shiny, evenly convex apically; apical margin broadly slightly convex, with a fringe of parallel long brownish hairs ( Fig. 2 ). Mandible relatively elongate, slightly narrow apically, with weak fine punctures; upper tooth slightly longer than lower tooth. Malar area shagreened. Malar space 1.2 × as long as basal width of mandible. Gena ( Figs 3 , 4 ) entirely shagreened, strongly evenly convergent posteriorly. Vertex ( Fig. 4 ) and frons with texture as face. Postocellar line 0.9 × as long as ocular-ocellar line. Posterior portion of vertex evenly concave. Frons slightly evenly convex medially.Antenna with 15 flagellomeres, each one distinctly longer than its own width ( Fig. 1 ), penultimate flagellomere about 1.5 × as long as width. Ratios of lengths from first to fifth flagellomeres: 1.0:1.1:1.1:1.1:1.0. Occipital carina complete, distinct, reaching hypostomal carina above base of mandible.

Mesosoma. Anterior margin of pronotum with dense yellowish white hairs, lateral concavity with short transverse wrinkles; dorsal posterior portion almost shiny, shagreened. Epomia indistinct. Mesoscutum ( Fig. 5 ) wide, almost as wide as long, evenly slightly convex, with even leathery texture. Notaulus evident on anterior portion of mesoscutum. Scutoscutellar groove almost smooth. Scutellum slightly convex, with texture as mesoscutum. Posterior portion of postscutellum transversely convex, rough, indistinctly punctate. Mesopleuron and metapleuron ( Fig. 6 ) with texture as face; speculum absent; episternal scrobe indistinct; upper anterior portion beneath subalar prominence with short indistinct transverse wrinkles. Epicnemial carina reaching to anterior margin of mesopleuron, about 0.3 × as long as posterior margin of pronotum. Sternaulus indistinct. Metapleuron with gray white hairs. Legs relatively slender; claw simple. Ratio of length of first to fifth hind tarsomeres 4.2:1.6:1.3:1.0:1.2. Wings hyaline. Fore wing with vein 1cu-a distal of M&RS by 0.4 × length of cu-a; section between 1cu-a and M&RS strongly widened. 2m-cu slightly basal of rs-m. 2cu-a absent. Hind wing cu 0.4 × as long as cu-a. Propodeum ( Fig. 7 ) evenly convex, with rough leathery texture and gray white hairs. Median longitudinal carina between basal margin and area superomedia 0.25 × as long as combined area of area superomedia and area petiolaris. Lateral longitudinal carina between posterior transverse carina and anterior margin absent. Propodeal spiracle small, circular.

Metasoma. Metasomal tergites smooth, shiny, almost without punctures. Tergite I ( Figs 8, 9 ) about 3.4 × as long as apical width; slender; postpetiole about 1.3 × as long as apical width; latero-median carina absent; basal portion of dorsolateral carina present; ventro-lateral carina complete; spiracle small, circular, located at apical 0.35 of tergite I. Tergite II ( Fig. 8 ) about 1.3 × as long as basal width; 1.1 × as long as apical width. Third and subsequent tergites strongly compressed. Ovipositor sheath about 2.5 × as long as hind tibia. Ovipositor ( Fig. 10 ) evenly curved upwards, subapical dorsal notch weak and shallow. Subapical portion of lower valve with 3 weak edges, distance between apical two about 3.0 × as long as distance between basal two.

Coloration ( Fig. 1 ). Black, except the following. Basal-ventral portion of antenna, apical portion of clypeus, mandible except teeth, maxillary and labial palpi, tegula, legs except fifth tarsomeres, lateral portions of third and subsequent tergites yellowish brown. Second tergite red brown. Dorsal profile and apical-ventral portion of antenna brown to dark brown. Basal portion of clypeus red brown. Lower portion of pronotum irregularly reddish brown. Dorsal portions of third and subsequent tergites brownish black. Lower portion of pterostigma dark brown. Veins mostly slightly brown; M&RS, RA, 2r&RS, RS, rs-m, CU darkish brown.

Distribution. CHINA: Liaoning.

Etymology. The name of the new species is based on the legs being brownish yellow.

Remarks. This new species is similar to A. maritimus (Thomson, 1889) , but can be easily distinguished from the latter by having fore wing 2m-cu slightly basal of rs-m; clypeus reddish brown; middle and hind coxae yellowish brown. A. maritimus : 2m-cu distinctly distal of rs-m.; basal portion of clypeus black; middle and hind coxae black.

The new species can be distinguished from known Oriental species by having occipital carina complete and distinct (other Oriental species with dorsal portion of occipital carina widely absent).

Figures

FIGURE 1. Aneuclis flavopedes Sheng, Zhou & Wei, sp.nov. Holotype. Female. 1 Habitus, lateral view.

FIGURES 2–3. Aneuclis flavopedes Sheng, Zhou & Wei, sp.nov. Holotype. Female. 2 Head, anterior view 3 Head, lateral view.

FIGURES 4–7. Aneuclis flavopedes Sheng, Zhou & Wei, sp.nov. Holotype. Female. 4 Head, dorsal view 5 Mesoscutum 6 Mesosoma, lateral view 7 Propodeum, dorsal view.

FIGURES 8–10. Aneuclis flavopedes Sheng, Zhou & Wei, sp.nov. Holotype. Female. 8 Tergites I-II, dorsal view 9 Tergite I, lateral view 10 Apical portion of ovipositor, lateral view.