Venturia contiguus, Han & Achterberg & Chen, 2021

Han, Yuan-Yuan, Achterberg, Kees van & Chen, Xue-Xin, 2021, New species and records of Venturia Schrottky (Hymenoptera, Ichneumonidae, Campopleginae) from China and Nepal, ZooKeys 1041, pp. 113-136 : 113

Venturia contiguus sp. nov. Figures 1 , 2

Materia examined.

Holotype: China • ♀; Fujian, Nanping; 21.IX.2002; Xiao-Xia Yu leg.; No. 20025513. Paratype: China • 1♀; Zhejiang, Songyang; 7.VII.1982; Han-Lin Chen leg.; No. 924532.

Comparative diagnosis.

In the key by Gupta and Maheshwary (1977), this species keys out as V. oditesi (Sonan, 1939) from China and Myanmar because of the missing areolet on the fore wing. It can be easily distinguished from V. oditesi by the following: malar space approximately 0.2 × basal width of mandible, propodeal area basalis not confluent with area superomedia, second tergite 2.0 × longer than third tergite, 2rs-m vein very close to 2m-cu vein, hind femur blackish brown, hind tibia blackish brown medially, and metasoma wholly blackish with apical segments blackish brown.

This species is also similar to V. oblongata Gupta & Maheshwary, 1977 from Singapore, but differs from it by having the following: face rugulose-punctate, malar space 0.2 × basal width of mandible, pronotum rugose-punctate dorsally, mesoscutum punctate and punctate-reticulate apically, propodeal area lateralis rugose-punctate, area basalis not confluent with area superomedia, area external punctate, hind femur blackish brown, and metasoma wholly blackish with apical segments blackish brown.

Description.

Female holotype (Fig. 1 ). Body length 7.2 mm, fore wing length 3.9 mm.

Head. Antenna with 37 flagellomeres; first flagellomere 1.2 × longer than second flagellomere. Face (Fig. 2F ) rugulose-punctate, somewhat less pronounced laterally. Clypeus matte, weakly punctate. Malar space finely granulate, 0.2 × basal width of mandible. Mandible with lamella more prominent in the basal 0.5. Frons granulate-punctate, median carina indistinct. Vertex granulate. Interocellar distance (Fig. 2G ) 2.1 × ocello-ocular distance and 2.0 × distance between median and lateral ocelli. Temple subpolished, ca 0.4 × length of the eye in dorsal view. Occipital carina evenly arched, joining hypostomal carina at mandible base.

Mesosoma. Pronotum (Fig. 2I ) rugose-punctate dorsally, trans-striate laterally. Mesoscutum (Fig. 2H ) punctate, rugulose-punctate in notaulic area, punctate-reticulate apically. Scutellum punctate anteriorly, rugose-punctate posteriorly. Metanotum rugose-punctate. Mesopleuron (Fig. 2C ) punctate, trans-striate below tegula, speculum smooth. Propodeum (Fig. 2D ) with area basalis trapezoid; area superomedia long and narrow with rugosity, not confluent with area basalis but confluent with area petiolaris; area petiolaris trans-striate; area external punctate; area dentipara rugose-punctate; area lateralis rugose-punctate; lateromedian longitudinal carina almost parallel; propodeal spiracle small, oval. Propodeum extending to 0.7 of hind coxa.

Wing. Fore wing (Fig. 2A ) areolet absent. 2rs-m slightly in front of the 2m-cu by only 0.2 × of its length. RS ca 1.6 × longer than 2r&RS. 1cu-a opposite M&RS, inclivous. External angles of second discal cell acute (70°). Hind wing (Fig. 2B ) with CU&cu-a intercepted at lower 0.3 of its length. Distal abscissa of CU connected to CU&cu-a, spectral.

Legs. Hind femur 5.3 × longer than wide. Inner spur ca 0.6 × as long as first tarsomere of hind tarsus. Tarsal claws pectinate (Fig. 2K ).

Metasoma. Apical tergites from third on compressed. First segment (Fig. 2E ) long and slender, ca 3.1 × longer than its apical width, without glymma; dorsolateral carina of first tergite missing; petiole ca 6.0 × width; suture separating first tergite from sternite situated mid height at basal third of first metasomal segment. Second tergite finely granulate, relatively long and slender, 0.8 × first tergite, 2.0 × third tergite, 3.4 × its apical width; thyridium oval, located at basal 0.4 length of second tergite. Posterior margins of sixth and seventh tergites medially concave. Ovipositor sheath ca 1.5 × longer than hind femur, ovipositor ca 2.5 × longer than hind femur. Ovipositor upcurved apically, dorsal preapical notch strong, tip acute (Fig. 2J ).

Colour. Black. Mandible except teeth, scape and pedicel except laterally, palpi, tegula, fore and mid coxae in apical half and all trochanters, yellow. Coxae ventrally blackish brown. Rest of fore and mid legs yellowish brown to blackish brown, with apical tarsal segment blackish brown. Hind coxa in apical half and trochanter, yellow. Remainder of hind leg blackish brown with tibia basally and apically darker. Metasoma wholly blackish with apical segments blackish brown.

Distribution.

China (Fujian, Zhejiang).

Etymology.

Name derived from " Venturia contiguus " (Latin for “near”), because 2rs-m vein situated close to 2m-cu vein.

Figures

Figure 1. Venturia contiguus sp. nov., female, habitus, lateral view.

Figure 2. Venturia contiguus sp. nov., female A fore wing B hind wing C mesosoma, lateral view D propodeum, dorsal view E first metasomal segment, lateral view F head, anterior view G head, dorsal view H mesoscutum, dorsal view I pronotum, lateral view J tip of ovipositor, lateral view K hind tarsal claw.