Priopoda biconcava Sheng & Sun

Sheng, Mao-Ling & Sun, Shu-Ping, 2012, The species of Priopoda Holmgren (Hymenoptera: Ichneumonidae) from China with a key to species known in Oriental and Eastern Palaearctic Regions, Zootaxa 3222, pp. 46-60 : 48-50

Priopoda biconcava Sheng & Sun , sp.n. ( Figures 1–6 , 29 )

Etymology. The specific name is derived from the subgenital plate of male with two apical notches.

Material examined. Holotype: female, CHINA: Quannan County, 650 to 740m, Jiangxi province, 10 June 2008, leg. Shi-Chang Li ( GSFPM). Paratypes: 3 females, 3 males, CHINA: Quannan County, 650m to 740m, Jiangxi province, 24 May to 10 June 2008, leg. Shi-Chang Li ( GSFPM). 3 males, CHINA: Ji’an County, 21 May 2008, leg. Yi Kuang ( GSFPM). 1 female, CHINA: Guanshan, 400m, Yifeng County, Jiangxi Province, 23 May 2010, leg. Yi Li and Ling-Li Yi ( GSFPM).

Diagnosis. Face yellow, with median longitudinal brownish black spot. Terga 2 and 3 yellowish to reddish brown. Postscutellum distinctly transversely convex. Subgenital plate of male with two apical notches ( Fig. 6 ).

Description. Female. Body length 9.5 to 10.5 mm. Fore wing length 8.8 to 9.2 mm.

Head. Face ( Fig. 2 ) approximately 1.7 to 1.8 times as wide as long, almost flat, with indistinct fine coriaceous texture and weak, even and fine punctures. Upper margin with a small median tubercle. Clypeal suture very weak and indistinct. Clypeus 3.0 to 3.1 times as wide as long, evenly convex, with correspondingly large punctures; apical margin coarse, with long brown hairs. Mandible with fine coriaceous texture, apical portion with elongate punctures, upper and lower margins smooth; upper tooth slightly curved inward; lower tooth approximately 2.3 times as long as upper tooth. Cheek slightly coarse, lower portion with fine oblique lines. Malar space 0.25 to 0.3 times as long as basal width of mandible. Gena with fine coriaceous texture and even, distinct and fine punctures, distance between punctures 0.2 to 1.0 times diameter of puncture; posterior portion convergent backwardly, in lateral view approximately 1.2 times as long as width of eye. Vertex ( Fig. 3 ) with texture as that of gena. Interocellar area small and convex, fine coriaceous texture, with sparse fine punctures. Postocellar line approximately 0.4 times as long as ocular-ocellar line. Frons almost flat, with texture as that of face. Antenna slightly longer than body, with 42 to 43 flagellomeres; ratio of length from first to fifth flagellomeres: 8.0:6.0:5.5:5.2:5.0. Occipital carina complete.

Mesosoma. Mesosoma with fine coriaceous texture. Pronotum with unclear fine coriaceous texture, lateral concavity with indistinct short transverse wrinkles, upper-posterior portion with even and fine punctures. Epomia weak and short. Mesoscutum weakly convex, slightly coarse, posterior portion with weak and fine punctures; lateral margin from tegula to scutellum strongly marginate. Notaulus indistinct. Scutellum evenly convex, with fine punctures. Postscutellum transversely convex. Mesopleuron with distinct punctures. Speculum present, small. Epicnemial carina strong, upper end reaching to half distance to subalar prominence, comparatively far distant from front margin of mesopleuron. Metapleuron with even and fine punctures, which denser than that of mesopleuron. Submetapleural carina complete, anterior portion strongly convex triangularly. Wing gray-brownish hyaline. Fore wing with vein 1cu-a opposite 1/M. Areolet slanting quadrangular, with short petiole, 3rs-m longer than 2rsm, receiving vein 2m-cu at 0.7 to 0.75 distance from vein 2rs-m to 3rs-m. Vein 2-Cu slightly longer than 2cu-a. Hind wing vein 1/cu about 2 to 3 times as long as cu-a. Ratio of length of hind tarsomeres from first to fifth: 10.0:4.2:3.3:2.0:2.6. Claw densely pectinate. Propodeum ( Fig. 4 ) with fine and indistinct punctures. Area basalis without lateral carina. Area superomedia complete, convergent backwardly, approximately 1.3 times as long as widest width. Costula complete, connecting area superomedia at its anterior end. Anterior portions of lateral carinae, from level of spiracle to base of propodeum, disappeared. Anterior and posterior transverse carinae and pleural carinae present. Area externa combined with area dentipara. Spiracle almost circular, distance to lateral longitudinal carina as long as to pleural carina.

Metasoma. First tergum approximately 2.0 times as long as apical width, evenly longitudinally convex, with fine coriaceous texture and distinct fine punctures, near lateral margin of postpetiole slightly concave longitudinally. Without median dorsal carina. Dorsolateral carinae complete. Spiracle almost circular, small, located slightly before middle of first tergum. Second tergum ( Fig. 5 ) approximately 0.8 times as long as apical width, with fine and indistinct punctures. Median portion of third tergum with weak and fine punctures. Ovipositor sheath 0.6 to 0.7 times as long as apical depth of mesosoma.

Color ( Fig. 1 ). Black, except the following. Clypeus, mandibles except teeth, cheek, lower end of gena, ventral profile of scape, front and middle coxae and ventral profiles of hind coxae yellow. Face whitish yellow except median longitudinal brownish black spot. Tegulae yellow to brown. Ventral profile of flagella, maxillary palpi, labial palpi, front and middle legs except apical ends of dorsal profile of middle tibiae, upper-lateral portions of frons, ventral profiles of hind coxae and trochanters, hind tibiae except dorsoapical margins, approximately basal 0.7 of ventral profiles of hind tibiae, second and third terga and basal portion of fourth tergum.

yellowish brown to reddish brown. First and fifth hind tarsomeres sandy beige to darkish brown, second to fourth tarsomeres buff. Upper-posterior corner of pronotum reddish brown. Stigma and vein brownish black.

Male. Body length about 10.0 mm. Fore wing length about 8.5 mm. Antenna with 42 to 44 flagellomeres. Apical margin of subgenital plate with two notches ( Fig. 6 ). Face entirely and lateral portion of frons yellow. Propleuron with irregular darkish brown spot. Ventral and dorsal profiles of hind coxae yellow, lateral black; tarsomeres buff.

Variation. Area superomedia complete, or lateral carinae weak or degenerative. Femur of middle leg yellowish brown, or its dorsal profile more or less blackish brown. Hind trochanters brown, or dorsal profiles with irregular darkish spots.

Remarks. Similar to P. owaniensis ( Uchida, 1930) , but can be easily distinguished from the latter by the apical terga and hind femur black; dorsal profile of hind coxa black, ventral yellowish brown. Priopoda owaniensis : apical terga, from third to apical tergum yellowish red, hind leg entirely brown to reddish brown. It can be distinguished from other Oriental and Eastern Palaearctic species by the preceding key.

Figures

FIGURE 29. Distribution Map. A. Anfu, Jiangxi. B. Baiyunshan Natural Reserve, Henan. G. Guanshan Natural Reserve, Yifeng, Jiangxi. H. Huoditang, Ankang, Shannxi. J. Ji’an, Jiangxi. Js. Jinsa, Chishui, Guizhou. M. Mentougou, Beijing. Q. Quannan, Jiangxi. W. Wuyishan, Yianshan, Jiangxi.

FIGURES 1 – 6. Priopoda biconcava Sheng & Sun, sp. n. 1. Body, lateral view. 2. Face. 3. Vertex. 4. Propodeum. 5. Second tergum. 6. Subgenital plate of male, ventral view.