Casinaria melasoma Han, van Achterberg & Chen, 2021

Han, Yuan-Yuan, Achterberg, Kees Van & Chen, Xue-Xin, 2021, The genus Casinaria Holmgren, 1859 (Hymenoptera: Ichneumonidae, Campopleginae) from China, Zootaxa 4974 (3), pp. 504-536 : 522-524

Casinaria melasoma Han, van Achterberg & Chen , sp. nov.

Fig. 11–12

Material examined. Holotype: female, Xizang, Xiayadong , 19.VII.2013, Liu Zhen, No201400852.

Description. Female holotype. Body length 7.1mm, fore wing length 4.7mm.

Head. Antenna with 31 flagellomeres; basal flagellomeres relatively slender, first flagellomere about 3.5× longer than wide apically; preapical flagellomeres square, thicken apically. Head transverse, width 2.4× its length in dorsal view. Temple short, not immediately receding behind eye, in dorsal view about 0.5× as long as eye width. Interocellar distance about 1.4× ocello-ocular distance, 1.4× distance between median and lateral ocelli and equal to diameter of ocelli. Inner eye orbits strongly indented and weakly convergent ventrally. Genal carina not bent outwards ventrally, reaching hypostomal carina little before mandibular base. Malar space 0.3× as long as basal width of mandible. Face granulose, flat in profile, narrowed ventrally, minimal width of face 0.5× as long as eye length and 0.9× as long as width of frons. Clypeus granulose, weakly convex in profile, apical margin convex.

Mesosoma. Pronotum rugulose above, trans-striate below. Mesoscutum granulose, rugulose in notaulic area. Scutellum and metascutellum rugulose. Mesopleuron granulate on upper half, rugulose ventrally, trans-striate below subtegular ridge; speculum granulate, mat. Metapleuron slightly shiny and granulate, with lower portion rugulose, juxtacoxal carina absent. Propodeum rugulose on sides, rugose dorsally, with median groove broad and shallow, and trans-striate; basal carina distinct; medio-longitudinal carina distinct; lateral longitudinal carina distinct; apical transverse carina distinct on sides; costulae absent; propodeal spiracle oval.

Wing. Fore wing with relatively small, petiolate areolet, emitting second recurrent vein from its apex. Second intercubitus vein weakly pigmented. Radial cell very short, distal part of surrounding vein about 2.0× longer than proximal one. Nervulus distad of basal vein by 0.2 its length. External angles of discal cell acute (65°). Hind wing with nervellus vertical, intercepted at lower 0.25.

Legs. Hind femur 5.0× longer than wide. Inner spur of hind tibia about 0.7× as long as first tarsomere of hind tarsus.

Metasoma. First tergite short, stout, strongly widened apically, 2.7× longer than its apical width, about as long as second tergite, slightly shorter than hind femur. Second tergite 2.8× longer than its apical width; thyridium dropshaped, its distance from basal margin of tergite about 1.5× its length. Third tergite slightly longer than its apical width. Ovipositor sheath short, not extending behind metasomal apex.

Colour. Body black.

Male. Unknown.

Distribution. China (Xizang).

Comparison. This new species is similar to C. sordidata Gupta & Maheshwary, 1977 from Myanmar and Nepal, but differs from the latter by having the interocellar distance about 1.7× ocello-ocular distance, the temple not immediately receding behind eyes and whole body black.

Etymology. Name derived from “melas” (Greek for “black”) and soma (Greek for “body”), because its black body.

Figures

FIGURE 11. Casinaria melasoma sp. nov., female, habitus.

FIGURE 12. Casinaria melasoma sp. nov., female. A, fore wing; B, mesopleuron; C, propodeum; D, head, anterior view; E, head, dorsal view; F, mesoscutum.