Sinophorus dioryctriae, Han & Achterberg & Chen, 2021

Han, Yuan-Yuan, Achterberg, Kees Van & Chen, Xue-Xin, 2021, Five new species of the genus Sinophorus Förster (Hymenoptera, Ichneumonidae Campopleginae) from China, Zootaxa 5061 (1), pp. 115-133 : 117-120

Sinophorus dioryctriae sp. nov.

Figures 1 , 2

Material examined. Holotype: CHINA • ♀; Liaoning; Shenyang Benyang ; VIII.1963; Host: Dioryctria sp. ; Zhen-Ji Liu leg.; No. 63056.8 (one antenna with apical segments missing).

Description. Body length 10.3 mm, fore wing length 6.5 mm.

Head. Antenna with 41 flagellomeres; first flagellomere ca 1.4× length of second flagellomere. Face rugosepunctate, interspaces of punctures narrower than diameter of punctures. Clypeus granulose-punctate, interspaces of punctures 1.0–1.5× their diameter, slightly convex, apical margin slightly curved. Malar space weakly granulose, ca 0.3× basal width of mandible. Upper tooth of mandible slightly longer than lower tooth, with a weak lamella. Frons granulose, median carina absent. Vertex granulose. Interocellar distance 2.0× ocello-ocular distance and 2.5× distance between median and lateral ocelli. Temple mat, ca 0.7× as long as eyes in lateral view. Occipital carina evenly arched, reaching hypostomal carina slightly above mandible base.

Mesosoma. Pronotum punctate dorsally, trans-striate laterally. Mesoscutum granulose-punctate, but notaulic region rugose. Scutellum and metanotum punctate. Mesopleuron punctate, trans-striate below tegula, speculum smooth and shiny, punctures of lower half of mesopleuron separated by at most their diameter. Metapleuron punctate, punctures smaller and denser than that on mesopleuron, separated by less than their diameter. Propodeum with area basalis rectangular; anterior transverse carina close to base; area superomedia combined with area petiolaris, transversely rugose; area superomedia ca 0.8× as long as width of area petiolaris; area externa punctate; area dentipara rugose-reticulate; area lateralis punctate; costula, lateromedian longitudinal and lateral longitudinal carinae all strongly developed; propodeal spiracle oval, connected with pleural carina by a distinct carina.

Wing. Fore wing areolet present and with a short stalk emitting 2m-cu vein slightly behind middle. Marginal cell short, RS vein ca 1.7× longer than 2r&RS vein. Vein 1cu-a slightly distad of M&RS. External angles of second discal cell acute (70°). Hind wing with CU&cu-a slightly inclivous, 2-CU connected with CU&cu-a, intercepted at lower 0.15 of its length.

Legs. Hind femur 4.8× longer than wide. Inner spur of hind tibia ca 0.5× as long as first tarsomere of hind tarsus. Tarsal claws pectinate, hind tarsal claw with 5 slanting teeth basally, ca 1.4× longer than arolium.

Metasoma. Surface somewhat coriaceous. First metasomal segment with a weak dorso-lateral carina and lateral groove, suture separating first metasomal tergite from sternite ca 0.4 below mid height of petiole. First metasomal segment ca 2.8× longer than width of postpetiole; petiole ca 1.6× longer than postpetiole. Second tergite ca 0.7× as long as first tergite, 1.4× longer than its apical width; thyridium oval, its distance from basal margin of tergite ca equal to its length. Third tergite 0.8× as long as its apical width. Ovipositor sheath ca 1.5× longer than hind femur, ca 1.3× longer than first metasomal segment, and ca 0.9× as long as hind tibia. Ovipositor slightly upcurved, with depth at mid-length slightly more than width of hind first tarsomere, tip of upper valve of ovipositor ca 1.3× longer than hind telotarsus.

Colour. Black. Mandible medially and palpi, yellowish brown; tegula yellowish brown; scape and pedicel blackish brown; fore leg yellowish brown but coxa brown; mid leg yellowish brown but coxa and telotarsus blackish brown; hind coxa black, trochanter and trochantellus blackish brown, hind femur yellowish brown except infuscated extreme apex, hind tibia basally and medially, first tarsomere 0.4, second tarsomere 0.3, third tarsomere 0.2 whitish yellow, remainder of hind leg blackish brown; metasoma entirely black.

Distribution. Shenyang ( China).

Comparison. This species is similar to S. bazariae Sheng, 2015 , but differs from the latter by having antenna with 41 flagellomeres, notaulic region of mesoscutum rugose, hind femur 4.8× longer than wide, tarsal claw pectinate, first metasomal segment ca 2.8× length of width of postpetiole, second tergite 1.4× longer than its apical width, ovipositor sheath ca 1.5× longer than hind femur, ca 1.3× longer than first metasomal segment, and ca 0.9× as long as hind tibia, and hind femur yellowish brown but extreme apex infuscated. S. bazariae : antenna with 29 flagellomeres, notaulic region of mesoscutum not rugose, hind femur 4.2× longer than wide, tarsal claw not pectinate, first metasomal segment ca 2.1× length of width of postpetiole, second tergite 1.1× longer than its apical width, ovipositor sheath ca 0.8× as long as hind femur, ca 1.0× as long as first metasomal segment, and ca 0.6× as long as hind tibia, and hind femur brownish black externally and dark red internally.

Host. Dioryctria sp. ( Lepidoptera , Pyralidae ).

Etymology. Name derived from the generic name of the only known host species, viz. Dioryctria .

Figures

FIGURE 1. Sinophorus dioryctriae sp. nov., female, habitus, lateral aspect.

FIGURE 2. Sinophorus dioryctriae 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 ovipositor, lateral view.