Casinaria remota 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 : 528-530

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

Figs. 15–16

Material examined. Holotype: female, Zhejiang, Songyang , 27.V.1998, Chen Hanlin, No964912 . Paratypes: 1 male, Guizhou, Fanjinshan Huixiangping , 29.VII.2001, 1700m, Ma Yun, No 200108130 ; 1 female, Guizhou, Fanjinshan Huixiangping , 13.VII.1993, Xu Zaifu, No 836154 ; 1 female, Zhejiang, Tianmushan , 3–5.X.1983, Ma Yun, No 834337 ; 1 male, Zhejiang, Xitianmu, Qiliting , 23.VIII.1998, Zhao Mingshui, No 998640 .

Description. Female holotype. Body length 10.5mm, fore wing length 7.5mm.

Head. Antenna with 39 flagellomeres; basal flagellomeres relatively slender, first flagellomere about 3.2× longer than wide apically; preapical flagellomeres square. Head transverse, width 2.4× its length in dorsal view. Temple relatively wide, moderately narrowed behind eye, in dorsal view about 0.5× as long as eye width. Interocellar distance about 1.7× ocello-ocular distance, 2.0× distance between median and lateral ocelli and 1.7× 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 0.6× as long as basal width of mandible. Face granulate-rugulose, 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 convex.

Mesosoma. Pronotum rugulose above, trans-striate below. Mesoscutum granulate-rugulose, rugulose near notauli. Scutellum and metascutellum rugulose-punctate. Mesopleuron granulate on the upper half, rugulose below, trans-striate below subtegular ridge; speculum smooth and shiny. Metapleuron mat, with lower portion rugulose, juxtacoxal carina indistinct. Propodeum rugulose on sides, rugose to rugose-punctate dorsally, with median groove broad and shallow, trans-striate in area petiolaris; basal carina separated from base, basal area trapezoid; medio-longitudinal carina absent; lateral longitudinal carina absent; apical transverse carina distinct laterally; costulae absent; propodeal spiracle oval.

Wing. Fore wing areolet small with a short stalk, emitting second recurrent vein near its middle. Radial cell very short, distal part of surrounding vein about 1.5× longer than proximal one. Nervulus a little distad of basal vein. External angles of discal cell acute (75°). Hind wing with nervellus vertical, not intercepted.

Legs. Hind femur 5.0× longer than wide. Inner spur of hind tibia about 0.6× as long as first tarsomere of hind tarsus.

Metasoma. First tergite short, stout, strongly widened apically, 3.0× longer than its apical width, about as long as second tergite, slightly shorter than hind femur. Second tergite 1.4× longer than its apical width; thyridium dropshaped, its distance from basal margin of tergite about equal to its length. Third tergite slightly longer than its apical width. Ovipositor sheath short, not extending behind metasomal apex.

Colour. Black. Mandible except teeth yellowish brown. Scape, pedicel and tegulae black. Coxae black; fore leg yellowish brown; mid trochanter and femur black, tibia blackish apically, brownish basally, tarsus blackish brown; hind leg black, middle part of tibia brownish. First metasomal segment and second tergite except subapical-laterally, black; remainder of metasoma reddish brown with black mark.

Variation. Antenna with 39–41 flagellomeres; first flagellomere 3.0–3.2× longer than wide apically. Interocellar distance 1.7–1.9× ocello-ocular distance. Mid leg femur yellowish brown to blackish brown. Second tergite 1.4–1.8× longer than its apical width, beyond second tergite metasoma entirely reddish.

Male. Same as the female.

Distribution. China (Guizhou, Zhejiang).

Comparison. This new species is similar to the European C. flagellator Riedel, 2018 , but differs from the latter by having the propodeum rugose to rugose-punctate dorsally, metapleuron mat, genal carina slightly bent outwards ventrally, reaching hypostomal carina at mandibular base and face granulate-rugulose.

Etymology. Name derived from “remotus” (Latin for “far”), because the basal carina is removed from the base of the propodeum.

Figures

FIGURE 15. Casinaria remota sp. nov., female, habitus.

FIGURE 16. Casinaria remota sp. nov., female. A, fore wing; B, mesopleuron; C, propodeum; D, head, anterior view; E, head, dorsal view; F, mesoscutum.