Pseudocyanopterus raddeivorus Cao, van Achterberg & Yang, 2020

Cao, Liang-Ming, Achterberg, Cornelis Van, Tang, Yan-Long, Wang, Xiao-Yi & Yang, Zhong- Qi, 2020, Revision of parasitoids of Massicus raddei (Blessig & Solsky) (Coleoptera Cerambycidae) in China, with one new species and genus, Zootaxa 4881 (1), pp. 104-130 : 115-116

5. Pseudocyanopterus raddeivorus Cao, van Achterberg & Yang , sp. nov.

Figs 7 , 8

Material examined. Holotype: ♀, NE China, Liaoning Province, Kuandian County, Daxicha Forest, coll. 14.VI.2009 attached to larva of Massicus raddei , pupa: 17.VI.2009; emerged: 27.VI.2009, Yang Zhong-Qi . Paratypes: 1♂, id., but coll. 2. VI.2009, emerged 10. VI.2009; 1♀, id., but coll. 18. VI.2009, emerged 2.VII.2009, Yang Zhong-Qi & Tang Yan-Long ; 1♀, id., but coll. 24. VI.2009, emerged 4.VII.2009, Tang Yan-Long & Wang Xiao-Yi; 1♀, id., but coll. 20. VI.2009, emerged 5.VII.2009, Yang Zhong-Qi.

Description. Body length of ♀ / ♂ 2.8–5.0/ 4.1 mm. Fore wing length of ♀ / ♂ 2.8–4.6/ 3.4 mm.

Colour. (Female). Head yellow; stemmaticum yellow, ocelli black ( Fig. 7C ); antenna black ( Fig. 7E ); apical 1/2 of mandible black; labial and maxillary palpi pale yellow ( Fig. 7D ). Dorsal part of pronotum and mesoscutum medially yellow to orange, mesoscutum bilaterally black ( Fig. 7G ); side of pronotum, propleuron, fore leg yellow ( Fig. 7B ); scutellum, metanotum, propodeum, mesopleuron, metapleuron, middle leg, and hind leg entirely black ( Fig. 7G ). First metasomal tergite including epipleuron yellow (but posterior area between postero-lateral grooves brown), basal 2 nd tergite and 6 th, 7 th tergites more or less yellow; other parts of metasoma black in dorsal view ( Fig. 7H ); ovipositor sheath yellow to brown ( Fig. 7B ).

Head. In dorsal view, head width 1.65 × median length, 1.2 × width of mesoscutum; frons and vertex smooth, with few fine setae; median length of vertex 1.7 × median length of frons; ocellar triangle regular triangular, slightly higher than vertex; OOL: OD: POL = 11: 4: 3; length of eye: length of temple = 5: 3 ( Figs 7C, 7G ). In anterior view, median width of head 1.5 × height of head (excluding mandible); minimum distance between eyes subequal to height of eye; face smooth, covered with more setae than frons and vertex; height of clypeus 0.2 × its width, exterior margin of clypeus arcuate; mandible robust, apical 1/2 acute; malar space 0.2 × height of eye ( Fig. 7D ). In lateral view, maximum height of head (including mandible) 1.15 × maximum length of head ( Fig. 7F ). Antenna with 36 antennomeres, scape subequal to 1 st flagellomere, 1.4 × longer than its maximum width; 1 st flagellomere 2.7 × its maximum width, 1.3 × 2 nd flagellomere; last flagellomere acute apically ( Fig. 7E ).

Mesosoma. In dorsal view, mesosoma smooth with sparse long setae; median length of mesoscutum 0.9 × its width; middle lobe of mesoscutum evenly rounded in front; notauli weak, nearly absent; scutellar sulcus 0.45 × maximum width of mesoscutum and its length 1/10 of median scutellar length, with 7 longitudinal carinae; scutellum smooth with sparse long setae, apical scutellum and axilla with dense setae; metanotum 0.3 × median length of scutellum, smooth; propodeum smooth with dense long white setae, without any carina ( Fig. 7G ). In lateral view, length of mesosoma 1.6 × its height; mesoscutum evenly elevated above pronotum; mesopleuron smooth, with sparse long setae anteriorly, subalar depression weakly developed, posterior mesopleuron, metapleuron with dense fine long setae ( Fig. 7B ).

Wings ( Fig. 8D ). Subhyaline; length of fore wing 3.0 × its maximum width; pterostigma 3.0 × as long as its maximum width; vein 1-R1 1.9 × length of pterostigma; vein r originates at basal 2/5 of pterostigma; vein SR1 3.0 × as long as vein 3-SR; vein 3-SR 2.1 × as long as vein r; vein r 0.5 × as long as vein 2-SR; meeting point of veins 2-SR, 2-M and 2-SR+M less sclerotized, veins interrupted; vein 1-SR+M straight; vein 1-SR 0.4 × length of vein 1-M; vein r-m interrupted both ends, less sclerotised; veins 3-M and CU1a extending to wing margin. Length of hind wing 4.7 × its maximum width; vein M+CU 0.4 × length of vein 1-M; vein 1r-m of hind wing twice as long as vein 2-SC+R.

Legs. Fore femur 0.9 × as long as fore tibia and 4.2 × as long as its width, fore tibia 8.0 × its width, spur 0.6 × as long as basitarsus of fore leg, ratio of fore tarsomeres I–V = 60: 40: 21: 17: 25 ( Fig. 8A ); middle femur 0.8 × middle tibia, spur 0.3 × as long as basitarsus of middle leg, ratio of middle tarsomeres I–V = 65: 37: 26: 15: 25 ( Fig. 8B ); hind femur 3.3 × its width, 0.7 × as long as hind tibia, ratio of hind tarsomeres I–V = 55: 30: 20: 12: 18 ( Fig. 8C ).

Metasoma ( Fig. 7H ). First tergite 1.5 × longer than its maximum apical width in dorsal view (excluding epipleuron); epipleuron visible in dorsal view; 1 st tergite with elongate and deep basal depression, coarsely punctate medio-posteriorly and with crenulate lateral grooves, flat lateral area narrow posteriorly; 2 nd tergite smooth (except crenulate grooves and some superficial rugae anteriorly), medio-basal and baso-lateral areas rather small, mediobasal area connect to carina posteriorly; suture between 2 nd and 3 rd tergites 0.2 × as long as median length of 3 rd tergite; maximum width of 3 rd tergite 2.3 × its median length (without 2 nd metasomal suture); 3 rd tergite with large antero-lateral areas; 4 th and 5 th tergites smooth and shiny, weakly convex and without crenulate transverse basal groove or antero-lateral areas; ovipositor sheath 2.25–2.43 × longer than median length of metasoma, and 1.28–1.40 × longer than fore wing; ovipositor narrow, but apically widened and upper valve convex dorsally, with minute ventral teeth apically ( Fig. 8E ).

Male. Similar to female, but with 1 st tergite entirely yellow.

Etymology. Named after the Latin name of its host and “voro” (Latin for “devour”).

Hosts. Parasitoid of Massicus raddei .

Distribution. Palaearctic China (Liaoning).

Remarks. Five individuals were reared from just three host corpses in NE China, indicating that the population is likely to be small. The ratio of female to male is 4:1.

Figures

FIGURE 7. Pseudocyanopterus raddeivorus gen. nov. et spec. nov., ♀, holotype. A Habitus, dorsal aspect, scale bar = 1 mm B Habitus, lateral aspect, scale bar = 1 mm C Head, dorsal aspect, scale bar = 0.3 mm D Head, frontal aspect, scale bar = 0.25 mm E Antenna, scale bar = 1 mm F Head, lateral aspect, scale bar = 0.5 mm G Head and mesosoma, dorsal aspect, scale bar = 0.5 mm H Metasoma, dorsal aspect, scale bar = 0.5 mm.

FIGURE 8. Pseudocyanopterus raddeivorus gen. nov. et spec. nov., ♀, holotype. A Fore right leg, scale bar = 0.6 mm B Middle right leg, scale bar = 0.6 mm C Hind right leg, scale bar = 1 mm D Fore wing and hind wing, scale bar = 0.8 mm E Ovipositor tip, lateral aspect, scale bar = 0.2 mm.