Campodorus concavus Wei & Sheng, 2024

Wei, Ya-Wei & Sheng, Yuan-Jü, 2024, A new species of genus Campodorus (Hymenoptera, Ichneumonidae) from China, Zootaxa 5458 (2), pp. 286-292 : 287-290

Campodorus concavus Wei & Sheng , sp. nov.

Figures 1–8

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

Diagnosis. Upper tooth of mandible shorter than lower tooth. Frons almost flat, shagreened. Lateromedian longitudinal carinae of propodeum weakly present medially. Tergite 1 ( Figs 7–8 ) 1.3 × as long as posterior width, strongly convergent to base, with large basal median concavity. Face entirely black. Clypeus almost entirely yellow. Hind coxa red with yellow spots; posterior portion of postpetiole, tergite 2 and anterior portion of tergite 3 predominantly yellowish to reddish brown.

Description. Female ( Fig. 1 ). Body length about 5.3 mm. Fore wing length about 4.2 mm. Ovipositor sheath length about 0.4 mm.

Head. Inner orbits almost parallel. Face ( Fig. 2 ) approximately 1.5 × as wide as long, slightly evenly convex medially, shagreened, median portion with indistinct punctures; upper margin with median small tubercle. Clypeus almost shiny, approximately2.5 × as wide as long, with sparse yellow setae.Basal portion of mandible with sparse long yellowish brown setae, upper tooth slightly shorter than lower tooth. Malar space weakly shagreened, about 0.3 × as long as basal width of mandible. Gena ( Fig. 4 ) slightly shagreened, widened dorsally, evenly convergent posteriorly. Vertex ( Fig. 4 ) with texture as that of gena. Stemmaticum slightly elevated. Postocellar line approximately 0.8 × as long as ocular-ocellar line. Frons slightly concave, shagreened. Antenna with 29 flagellomeres; ratio of length from first to fifth flagellomeres approximately: 2.0:1.2:1.1:1.1:1.0. Occipital carina complete, joining hypostomal carina distinctly above base of mandible.

Mesosoma. Anterior portion of pronotum ( Fig. 4 ) with indistinct longitudinal wrinkles, slightly shiny; lateral concavity broad, lower portion with oblique wrinkles. Epomia present. Mesoscutum ( Fig. 3 ) almost shiny, with relatively sparse irregular punctures. Notauli weak, reaching middle of mesoscutum. Scuto-scutellar groove broad, almost smooth. Scutellum distinctly convex. Postscutellum transversely convex. Mesopleuron ( Fig. 4 ) shiny, smooth medially; with fine punctures, sparser dorsally. Speculum large. Upper end of epicnemial carina almost reaching anterior margin of mesopleuron, approximately reaching 0.7 distance to subtegular ridge. Metapleuron convex, with weak punctures and brownish yellow setae, lower posterior portion with short oblique wrinkles. Claw simple. Apex of inner profile of hind tibia. Ratio of length of hind tarsomeres from first to fifth approximately: 4.3:2.1:1.7:1.0:1.7. Ventral apexes of hind tarsomeres 1–4 with 2 long setae. Wings brownish gray, hyaline. Fore wing with vein 1cu-a distal to M&RS by approximately 0.3 × length of 1cu-a. Postnervulus intercepted almost at middle. Hind wing vein 1-cu 3.0 × as long as cu-a. Propodeum ( Fig. 5 ) almost shiny, with whitish gray setae, basal median portion distinctly concave. Lateromedian longitudinal carinae vestigial, only median portions weakly present. Posterior transverse carinae complete. Propodeal spiracle small, circular.

Metasoma. Tergite 1 ( Figs 6–8 ) approximately 1.3 × as long as posterior width, strongly convergent to base, base with large median concavity. Anterior portion coarsely shagreened, posterior relatively finely shagreened; latero-median carina present at basal 0.25 to 0.3; spiracle small, circular, distinctly convex, located at anterior 0.4 of first tergite. Base of sternite 1 distinctly convex. Second and subsequent tergites ( Fig. 6 ) slightly shagreened. Tergite 2 ( Fig. 6 ) approximately 0.7 × as long as apical width. Ovipositor sheath ( Fig. 1 ) approximately 0.8 × as long as apical depth of metasoma. Ovipositor with broad subapical dorsal notch.

Coloration ( Fig. 1 ). Black, except for following: clypeus, mandible except teeth, maxillary and labial palpi yellow. Dorsal profile of antenna blackish brown, ventral profile brown. Dorso-posterior and lower corners of pronotum, antero-lateral spots of mesoscutum, scutellum, postscutellum, tegulae and subtegular ridge yellow. Fore and middle coxae, all trochanters, inner profiles of hind coxae and hind tibia except base and apical 0.3, setae of scutellum yellowish white. Femora and outsides of hind coxae brownish red. Fore and middle tibiae and tarsi yellowish to reddish brown. Setae of apex of inner profile of hind tibia yellowish brown. Posterior portion of postpetiole, tergite 2 and anterior portion of tergite 3 predominantly yellowish to reddish brown. Posterior margins of tergites 3–7 narrowly yellowish white. Pterostigma and veins brown to dark brown.

Male. Unknown.

Distribution. CHINA: Beijing, Liaoning.

Etymology. The specific name is derived from the base of tergite 1 largely concave medially.

Differential diagnosis. The new species is similar to Campodorus rasilis Sheng, Sun & Li, 2020 , but can be distinguished from the latter by the following combinations of characters: upper tooth of mandible shorter than lower tooth; lateromedian longitudinal carinae of propodeum weak; tergite 1 with large basal median concavity, latero-median carina present at basal 0.25 to 0.3; hind coxa red with yellow spots; posterior portion of postpetiole, tergite 2 and anterior portion of tergite 3 predominantly yellowish to reddish brown. Campodorus rasilis : upper tooth of mandible same length as lower tooth; lateromedian longitudinal carinae of propodeum distinct, evenly narrowed anteriorly; median base of tergite 1 normally concave, latero-median carina reaching beyond middle; hind coxa red; all tergites black with white posterior margins.

Figures

FIGURES 1–3. Campodorus concavus Wei & Sheng, sp. nov., ♀, holotype (CBDPC). 1. Habitus, lateral view. 2. Head, anterior view. 3. Mesoscutum and scutellum, dorsal view.

FIGURES 4–8. Campodorus concavus Wei & Sheng, sp. nov., ♀, holotype (CBDPC). 4. Head and mesosoma, lateral view. 5. Postscutellum and propodeum, dorsal view. 6. Metasoma, dorsal view. 7. First tergite, dorsal view. 8. Tergite 1, lateral view.