Campoplex acarus, Han & Achterberg & Chen, 2021

Han, Yuan-Yuan, Achterberg, Kees Van & Chen, Xue-Xin, 2021, The genus Campoplex Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Campopleginae) from China, Zootaxa 5066 (1), pp. 1-121 : 11-12

Campoplex acarus sp. nov.

Figs. 3–4

Material examined. Holotype: female, Hubei, Shennongjia Muyuzhen, 19.V.2012, Huang Junhao, No 20046116 ( ZJUH).

Description. Female ( Fig. 3 ) holotype. Body length 3.6 mm, fore wing length 2.8 mm.

Head. Antenna with at least 16 flagellomeres (apical segments missing); first flagellomere 1.15× longer than second flagellomere. Face ( Fig. 4E ) granulose. Clypeus ( Fig. 4E ) granulose, slightly convex, apical margin slightly arched. Malar space granulose, 0.8× basal width of mandible. Mandible without lamella, upper tooth equal to the length of lower tooth. Frons granulose, median carina absent. Vertex granulose. Interocellar distance ( Fig. 4F ) 1.2× ocello-ocular distance and 1.6× distance between median and lateral ocelli. Temple granulose, subpolished, slightly swollen behind eyes. Occipital carina evenly arched, reaching hypostomal carina at mandible base.

Mesosoma. Pronotum granulose, polished, not trans-striate below. Mesoscutum ( Fig. 4G ) granulose, notauli indistinct. Scutellum and metanotum granulose. Mesopleuron ( Fig. 4B ) granulose, weakly trans-striate below tegula, speculum smooth and shiny. Metapleuron ( Fig. 4B ) granulose. Propodeum ( Fig. 4C ) with area basalis trapezoid; area superomedia granulose, polished; area petiolaris rugose; area superomedia confluent with area petiolaris, not depressed; all carina distinctly developed but not high; propodeal spiracle small and round.

Wing. Fore wing ( Fig. 4A ) without areolet. Marginal cell short, distal part of surrounding vein 2.1× longer than proximal one. Vein 1cu-a opposite M&RS. External angles of second discal cell acute (60°). Hind wing with nervellus inclivous, intercepted at lower 0.1.

Legs. Hind femur 5.0× longer than wide. Inner spur of hind tibia 0.55× as long as first tarsomere of hind tarsus. Tarsal claws not pectinate.

Metasoma. First metasomal segment ( Fig. 4H ) round in cross-section of basal 0.3, with dorso-lateral carina and lateral groove. First tergite 2.8× longer than width of postpetiole. Postpetiole and second tergite granulose, mat. Second tergite 0.8× as long as first tergite, 3.0× longer than its apical width; thyridium round, its distance from basal margin of tergite 2.0× its diameter. Third tergite equal to its apical width. Sixth and seventh tergites without emarginations medially. Ovipositor sheath approx. 1.9× longer than hind femur, ovipositor ( Fig. 4D ) gradually upcurved.

Colour. Black. Mandible except teeth, palpi, tegula, fore and mid legs trochanters and trochantellus, fore coxa apically and hind trochantellus whitish yellow; scape and pedicel blackish brown; fore coxa basally and telotarsus brown, remainder of fore leg yellowish brown; mid leg brown except tibia medially pale whitish; hind leg blackish brown with tibia medially pale whitish; metasoma entirely black.

Distribution. China (Hubei).

Comparative diagnosis. This species is similar to C. granulosus sp. nov., but differs from the latter by having apical margin of clypeus slightly arched, malar space 0.8× basal width of mandible, temple not swollen behind eyes, pronotum not trans-striate below, propodeal area petiolaris rugose, second metasomal tergite 3.0× longer than its apical width, and body color different.

Etymology. Name derived from “acares” (Greek for “short and small”), because its body size is small.

Figures

FIGURE 3. Campoplex acarus sp. nov., female, habitus.

FIGURE 4. Campoplex acarus sp. nov., female. A, fore wing; B, mesopleuron; C, propodeum; D, ovipositor; E, head, anterior view; F, head, dorsal view; G, mesoscutum; H, first metasomal segment.