Casinaria partolstoyi 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 : 525-526

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

Figs. 13–14

Material examined. Holotype: female, Xinjiang, Gongnaisi , 19.VII.1991, He Junhua, No913979.

Description. Female holotype. Body length 6.5 mm, fore wing length 4.1 mm.

Head. Antenna with at least 24flagellomeres (apical segments missing); basal flagellomeres relatively slender, first flagellomere about 2.5× longer than wide apically. Head transverse, width 2.3× its length in dorsal view. Temple narrow behind eye, in dorsal view about 0.4× as long as eye width. Interocellar distance about 1.9× ocello-ocular distance, 2.0× between median and lateral ocelli and 1.5× diameter of ocelli. Inner eye orbits indented and weakly convergent ventrally. Genal carina slightly bent outwards ventrally, reaching hypostomal carina at mandibular base. Malar space 0.5× as long as basal width of mandible. Face granulate, flat in profile, narrowed ventrally, minimal width of face 0.6× as long as eye length and 0.9× as long as width of frons. Clypeus granulate, weakly convex in profile, apical margin truncate.

Mesosoma. Pronotum mat granulate dorsally, trans-striate below. Mesoscutum granulose. Scutellum granulose above and granulate-rugulose below. Metascutellum granulate-rugulose. Mesopleuron granulate, very weakly trans-striate below subtegular ridge; speculum flat, granulose. Metapleuron granulate, with ventral portion rugulose, juxtacoxal carina absent. Propodeum rugulose laterally, rugose dorsally, with median groove broad and shallow, weakly trans-striate; basal carina separated from base, basal area nearly rectangular; medio-longitudinal carina, lateral longitudinal carina, apical transverse carina and costulae all distinctly present; propodeal spiracle oval.

Wing. Fore wing areolet small with a short stalk emitting second recurrent vein from its apical part. Radial cell very short, distal part of surrounding vein about 2.0× longer than proximal one. Nervulus a little distad of basal vein. External angles of discal cell acute (75°). Hind wing with nervellus vertical, intercepted at lower 0.15.

Legs. Hind femur 4.0× longer than wide. Inner spur of hind tibia about 0.6× as long as first tarsomere of hind tarsus.

Metasoma. Metasoma cylindrical. First tergite short, stout, strongly widened apically, 2.5× longer than its apical width, about 1.5× longer than second tergite, 0.8× as long as hind femur. Second tergite 1.1× longer than its apical width; thyridium circular, its distance from basal margin of tergite about equal to its length. Third tergite shorter than its apical width. Ovipositor sheath short, not extending behind metasomal apex.

Colour. Black. Mandible except teeth yellowish brown. Scape and pedicel brown, yellowish brown above. Tegulae yellow. Coxae black; fore leg and mid legs brown, apical tarsal segments blackish brown; hind leg trochanter black, trochantellus blackish brown, femur brown with basally and apically blackish, tibia with basally and medially brown, with subbasally and apically blackish, tarsus black. Metasoma black.

Male. Unknown.

Distribution. China (Xinjiang).

Comparison. This new species is similar to C. tolstoyi Gupta & Maheshwary, 1977 from India, but differs from the latter by having the costulae distinct, legs yellowish brown, nervellus intercepted at lower 0.15, and propodeum rugose.

Etymology. Name derived from “par” (Greek for “near”), and the specific name “tolstoyi”, because it is similar to C. tolstoyi .

Figures

FIGURE 13. Casinaria partolstoyi sp. nov., female, habitus.

FIGURE 14. Casinaria partolstoyi sp. nov., female. A, fore wing; B, mesopleuron; C, propodeum; D, head, anterior view; E, head, dorsal view; F, mesoscutum.