Sinophorus spissus, 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 : 128-131

Sinophorus spissus sp. nov.

Figures 9 , 10

Material examined. Holotype: CHINA • ♀; Xinjiang, Wulumuqi ; 14.VII.1991; Jun-Hua He leg.; No. 911767 . Paratypes: China • 1♂; Xinjiang, Kuerle ; 8.VII.1991; Jun-Hua He leg.; No913167 • 1♀ 3♂; Xinjiang, Moyu; 17.VII.1991; Jun-Hua He leg.; No. 912272, 912251, 912273, 912276 • 2♀ 1♂; Xinjiang, Wulumuqi; 29.VII.1991; Jun-Hua He leg.; No. 916113, 911552, 914752 .

Description. Body length 9.0 mm, fore wing length 6.3 mm.

Head. Antenna with 43 flagellomeres; first flagellomere ca 1.3× length of second flagellomere. Face rugosepunctate, with large punctures, separated by less than their diameter. Clypeus granulose-punctate, punctures small, interspaces of punctures equal to diameter of punctures dorsally and 1.5–3.0× ventrally, slightly convex, apical margin slightly curved. Malar space weakly granulose, ca 0.4× basal width of mandible. Upper tooth of mandible as long as lower tooth, with a very weak lamella. Frons rugose-punctate, median carina developed. Vertex granulose with sparse minute punctures. Interocellar distance 1.5× ocello-ocular distance and 1.9× distance between median and lateral ocelli. Temple mat, ca 0.6× as long as eyes in lateral view. Occipital carina evenly arched, reaching hypostomal carina slightly above mandible base.

Mesosoma. Pronotum punctate dorsally, transversely striate laterally. Mesoscutum granulose-punctate, punctures denser on median lobe. Scutellum punctate. Metanotum granulose-punctate. Mesopleuron punctate, transversely striate below tegula, speculum smooth and shiny, interspaces of punctures of lower half of mesopleuron 1.0–1.5× diameter of punctures. Metapleuron punctate. Propodeum with area basalis rectangular; anterior transverse carina close to base; area superomedia combined with area petiolaris, median area of combined area transversely rugose, area superomedia ca 0.7× as long as width of area petiolaris; area externa granulose-punctate; area dentipara rugose-reticulate; area lateralis rugulose-punctate; costula weakly developed; lateromedian longitudinal carina weakly developed below costula and gradually stronger apically; lateral longitudinal carina absent; 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 from its basal part. Marginal cell short, RS vein ca 1.7× longer than 2r&RS. Vein 1cu-a slightly distad of M&RS. External angles of second discal cell acute (70°). Hind wing with CU&cu-a slightly reclivous, 2-CU connected to CU&cu-a, intercepted at lower 0.25 of its length.

Legs. Hind femur 4.1× longer than wide. Inner spur of hind tibia ca 0.6× as long as first tarsomere of hind tarsus. Tarsal claws strongly pectinate, hind tarsal claw with 3 slanting teeth basally, ca 1.7× longer than arolium.

Metasoma. Surface somewhat coriaceous. First metasomal segment without dorso-lateral carina and lateral groove, suture separating first metasomal tergite from sternite ca 0.3 below mid height of petiole. First metasomal segment ca 2.8× length of width of postpetiole; petiole ca 1.7× longer than postpetiole. Second tergite ca 0.7× as long as first tergite, 1.3× longer than its apical width; thyridium long oval, its distance from basal margin of tergite ca 0.9× its length. Third tergite ca 0.9× as long as its apical width. Ovipositor sheath ca 1.3× longer than hind femur, ca 1.7× longer than first metasomal segment, and ca 0.8× as long as hind tibia. Ovipositor almost straight, with depth at mid-length slightly longer than width of hind first tarsomere, tip of upper valve of ovipositor ca 1.1× longer than hind telotarsus.

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

Male. Median area of Propodeum broader and deeper, otherwise similar to female.

Variation. First flagellomere 1.3–1.5× length of second flagellomere; interocellar distance 1.5–1.7× ocelloocular distance; propodeal area dentipara rugose-punctate to rugose-reticulate; area lateralis punctate to rugulosepunctate; costula weakly developed to moderately developed; lateromedian longitudinal carina indistinct to distinct under costula; fore and mid trochanters and trochantelli yellow to blackish brown.

Comparison. This species is similar to S. fuscicarpus (Thomson, 1887) , but differs from the latter by having clypeus with antero-median area not flattened, upper tooth of mandible as long as lower tooth, interspaces of punctures of lower half of mesopleuron 1.0–1.5× their diameter, area petiolaris with ca 10 moderately transverse rugae, hind tarsal claw with 3 slanting teeth basally. S. fuscicarpus : clypeus with antero-median area flattened, upper tooth of mandible longer than lower tooth, interspaces of punctures of lower half of mesopleuron at most equal to their diameter, area petiolaris with 17–20 moderately coarse transverse rugae, and hind tarsal claw with 6–8 slanting teeth.

Etymology. Name derived from “spissus” (Latin for “thick”), because its ovipositor is thick.

Figures

FIGURE 9. Sinophorus spissus sp. nov., female, habitus, lateral aspect.

FIGURE 10. Sinophorus spissus 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.