Strongylopsis propodealis Sheng & Sun, 2020

Sun, Shu-Ping, Wang, Tao, Li, Tao & Sheng, Mao-Ling, 2020, Two new species of Strongylopsis Brauns (Hymenoptera, Ichneumonidae, Pimplinae) from Beijing, and a key to all species, Journal of Hymenoptera Research 79, pp. 1-13 : 1

Strongylopsis propodealis Sheng & Sun sp. nov.

Figures 2 , 3, 4 , 5-7 , 8 , 9-10

Diagnosis.

Propodeum (Fig. 7 ) large, evenly convex, carinae almost entirely absent, with even, fine punctures. Propodeal spiracle elongate, 2.5 × as long as maximum width. Metasomal tergites with relatively dense, fine punctures. Second tergite 0.75-0.8 × as long as posterior width. Ovipositor almost straight, ventral valve with 10 strong ridges (Fig. 10 ). All tergites black.

Description.

Body length 8.0-8.5 mm. Fore wing length 5.0-6.0 mm.

Head. Head 1.6 × as wide as length from lower margin of clypeus to upper margin of face. Inner margins of eyes almost parallel. Face (Fig. 3 ) 1.4-1.5 × as wide as long, shiny, evenly convex, with sparse (upper median portion dense) distinct punctures and yellow brown setae. Clypeal sulcus vestigial. Clypeus 2.6-2.7 × as wide as long, shiny, median portion distinctly convex transversely, dorsal margin and lower lateral portions with yellowish brown setae; apical margin almost truncate. Mandible with large sparse punctures and yellowish brown setae, upper tooth slightly longer than lower tooth. Malar space 1.0-1.1 × basal width of mandible. Gena with sparse fine punctures. Vertex (Fig. 4 ) smooth, shiny, with fine sparse punctures. Postocellar line 0.8 × as long as ocular-ocellar line; ocular-ocellar line 1.7 × as long as maximum diameter of posterior ocellus. Frons (Fig. 4 ) evenly slightly concave, median portion with dense even yellowish brown setae. Antenna 1.4-1.5 × as long as mesosoma, with 33 flagellomeres. Ratios of lengths from first to fifth flagellomeres: 7:6:6:5:5. Occipital carina complete, reaching hypostomal carina slightly above base of mandible, distance to base of mandible 0.2 as long as basal width of mandibles.

Mesosoma. Lateral concavity of pronotum (Fig. 6 ) wide, deep, smooth, shiny, anterior margin with dense fine brown setae; dorsoposterior portion with dense fine punctures and brown setae. Epomia absent. Mesoscutum (Fig. 5 ) almost flat, shiny, anterior portion with fine punctures and yellowish brown setae. Notaulus indistinct. Scutellum almost shiny, with fine sparse punctures. Postscutellum with indistinct fine punctures. Mesopleuron (Fig. 6 ) with irregular fine punctures. Speculum and its surrounding area smooth, shiny. Upper end of epicnemial carina reaching subtegular ridge. Metapleuron with almost even fine punctures. Juxtacoxal carina absent. Legs stout. Outer profiles of tibiae with strong pegs (Fig. 2 ). Ratios of length of hind tarsomeres from first to fifth approximately: 3.6:2.8:2.0:1.3:2.2. Claw simple. Fore wing 1.05-1.1 × as long as metasoma, slightly brownish, hyaline. Vein 1cu-a opposite M&RS. Areolet pentagonal, receiving vein 2m-cu approximately 0.6 × distance from vein 2rs-m to 3rs-m. Postnervulus intercepted at lower 0.25. Hind wing vein 1-cu 0.2-0.25 × as long as cu-a. Propodeum (Fig. 7 ) evenly convex, shiny, with even, fine punctures (anterior and posterior portions almost sparsely punctate). Anterior of median longitudinal carina present as vestige. Propodeal spiracle elongate, 2.5 × as long as maximum width.

Metasoma. Metasomal tergites (Figs 8 , 9 ) slightly shiny, with even fine punctures. First tergite 1.6-1.7 × as long as apical width, evenly widened posteriorly, anterior portion almost impunctate; spiracle slightly convex, located at anterior 0.35. Second tergite 0.75-0.8 × as long as posterior width. Third tergite approximately 0.6 × as long as posterior width. Fourth tergite approximately 0.5 × as long as posterior width. Hind margin of seventh tergite slightly concave dorsally. Apex of ovipositor sheath slightly beyond apex of metasoma. Ovipositor almost straight, ventral valve with 10 strong ridges (Fig. 10 ).

Coloration (Fig. 2 ). Black, except for following: ventral profile of flagellum, apical half of clypeus, subapical portion of mandible, maxillary palpi, labial palpi, tegulae brown to reddish brown. Legs (except coxae black) red; apex of hind tibia and apical portion of each hind tarsomere slightly dark brown. Posterior margins of tergites slightly brownish. Pterostigma and veins dark brown.

Male.

Unknown.

Etymology. The specific name is derived from the large, oblong, smooth propodeum (Fig. 7 ).

Material examined. Holotype: China • ♀; Beijing, Xiaolongmen, Mentougou; 23.VI.2012; IT by Shi-Xiang Zong. Paratypes: China • 1♀; same data as for holotype except 16.VI.2009. • 3♀♀; same data as for holotype except 8-30.VI.2012; IT by Tao Wang, Shi-Xiang Zong. • 2♀♀; same data as for holotype except 28-29.VI.2013.

Host.

Unknown.

Distribution.

China.

Differential diagnosis.

The new species is similar to Strongylopsis chinensis He, 1996, but can be distinguished from the latter by the following combination of characters: frons without median carina; fore wing vein 1cu-a opposite M&RS; areolet pentagonal, receiving vein 2m-cu approximately 0.6 × distance from vein 2rs-m to 3rs-m; propodeum without wrinkles, without median longitudinal concavity; first tergite 1.6-1.7 × as long as posterior width; apical half of clypeus reddish brown. Strongylopsis chinensis : frons with median carina; vein 1cu-a distal of M&RS; areolet quadrate, receiving vein 2m-cu approximately 0.72 × distance from vein 2rs-m to 3rs-m; propodeum with transverse wrinkles, with median longitudinal concavity; first tergite 1.45 × as long as apical width; clypeus entirely black.

Figures

Figure 2. Strongylopsis propodealis Sheng & Sun, sp. nov. Holotype. Female. Habitus, lateral view.

Figure 8. Strongylopsis propodealis Sheng & Sun, sp. nov. Holotype. Female. Metasoma, dorsal view.

Figures 3, 4. Strongylopsis propodealis Sheng & Sun, sp. nov. Holotype. Female 3 head, anterior view 4 head, dorsoanterior view.

Figures 5 - 7. Strongylopsis propodealis Sheng & Sun, sp. nov. Holotype. Female 5 mesoscutum 6 mesosoma, lateral view 7 scutellum, postscutellum and propodeum, dorsal view.

Figures 9, 10. Strongylopsis propodealis Sheng & Sun, sp. nov. Female 9 holotype, apical portion of metasoma, lateral view 10 paratype, apical portion of metasoma, lateral view.