Breviterebra apicocrinis, Han & Achterberg & Chen, 2022

Han, Yuan-Yuan, Achterberg, Kees Van & Chen, Xue-Xin, 2022, Review of the genera Breviterebra Kusigemati, Charops Holmgren and Scenocharops Uchida (Hymenoptera, Ichneumonidae, Campopleginae) from China, with description of three new species, Zootaxa 5133 (4), pp. 527-542 : 529-531

Breviterebra apicocrinis sp. nov.

Figs. 1–2

Material examined. Holotype: female, Sichuan, Luhuo Zhuweixiang , 30.VI.2009, Tan Jiangli, No202019693 . Paratypes: 1 female, same data, No 202019694 ; 1 female, Xizang, Changdu ; 3.VIII.2013, Liu Zhen, No202019694 .

Description. Female holotype. Body length 5.9 mm, fore wing length 4.5 mm.

Head. Antenna with at least 18 flagellomeres (apex missing); first flagellomere ca 1.1× length of second flagellomere. Face granulose. Clypeus granulose, convex, apical margin truncated, blunt. Malar space granulose, ca 0.4× basal width of mandible. Upper tooth of mandible slightly longer than lower tooth, with a weak lamella. Frons granulose and without median carina. Vertex granulose. Interocellar distance equal to ocello-ocular distance and 2.5× distance between median and lateral ocelli; distance between lateral ocelli and eyes ca 1.2 × longer than diameter of ocellus. Temple mat, ca 0.5× as long as eyes in lateral view. Occipital carina evenly arched, reaching hypostomal carina at mandible base.

Mesosoma. Pronotum granulose-punctate dorsally and transversely striate laterally. Mesoscutum granulose, notauli absent. Scutellum granulose-punctate, metanotum granulose. Mesopleuron punctate, punctures separated by their diameter, finely transversely striate below tegula, speculum smooth and shiny. Metapleuron punctate and interspaces smooth. Propodeum with area basalis trapezoid; area superomedia hexagonal, slightly longer than wide and separated from area petiolaris; area superomedia flat, granulose-rugulose; costula relatively weak; propodeal spiracle oval, connected to pleural carina by a distinct carina.

Wing. Fore wing areolet absent; portion of vein M between 2rs-m and 2m-cu ca. 0.8× as long as 2rs-m. Marginal cell short, vein RS ca 2.3× longer than vein 2r&RS. Vein 1cu-a slightly distad of M&RS. External angles of second discal cell acute (65°). Hind wing with CU&cu-a inclivous, 2-CU connected with CU&cu-a, intercepted at lower 0.2 of its length.

Legs. Hind femur 4.7× longer than wide. Inner spur of hind tibia ca 0.6× as long as first tarsomere of hind tarsus. Tarsal claws pectinate basally ( Fig. 2J ).

Metasoma. First segment with dorso-lateral carinae, ca 2.8× longer than width of postpetiole; petiole ca 2.2× longer than postpetiole. Second tergite ca 0.7× as long as first tergite, as long as its apical width; thyridium oval, its distance from basal margin of tergite about equal to its length. Third tergite ca 0.8× as long as its apical width. Ovipositor a little shorter than apical depth of metasoma, with a weak subapical notch on upper valve ( Fig. 2E ); setose part of ovipositor sheath 0.4× as long as hind tibia.

Colour. Black. Scape and pedicel black; mandible yellow except teeth reddish brown; palpi and tegula yellow; fore and mid legs from apical half of coxae on yellowish brown; basal half of fore and mid coxae blackish brown; hind coxa, trochanter and trochantellus black, femur and tibia yellowish brown with base and apex of tibia more or less infuscated, basal 0.9 of tarsi yellowish brown and remainder infuscated; metasoma entirely blackish.

Variation. Propodeal costula varies from weak to strong; area superomedial slightly longer than wide to slightly wider than long; specimen from Xizang province has area petiolaris stronger rugulose than in the Sichuan specimens.

Distribution. China (Sichuan, Xizang).

Comparison. This species differs distinctly from the only other known species of this genus, B. laticlypeata as shown in the key above.

DNA Barcoding: The COI sequence iss deposited in GenBank (accession number MZ647963 ).

Etymology. Name derived from apex (Latin for tip) and crinis (Greek for hair), because its metasoma is densely setose apically.

Figures

FIGURE 1. Breviterebra apicocrinis sp. nov., holotype, female, habitus.

FIGURE 2. Breviterebra apicocrinis sp. nov., holotype, female. A fore wing B mesopleuron, lateral view C propodeum, dorsal view D first metasomal segment, lateral view E ovipositor, lateral view F head, anterior view G head, dorsal view H mesoscutum, dorsal view I metasomal apical segments J hind tarsal claw.