Sinophorus petilidentis, 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 : 126-128

Sinophorus petilidentis sp. nov.

Figures 7 , 8

Material examined. Holotype: CHINA • ♀; Xinjiang, Aletai ; 6.VII.1991; Deng-Yuan Wang leg.; No. 916308 (damaged: only one antenna left with apical segments missing, fore and middle legs on one side missing, and the metasoma disconnected from the mesosoma) . Paratypes: CHINA • 3♂; Xinjiang, Eming ; 14.VII.1990; Qi-Ma leg.; No. 907344, 907343, 907341 • 1♂, Xinjiang, Kuerle , 8.VII.1991; Jun-Hua He leg.; No. 913467 .

Description. Body length 8.0 mm, fore wing length 5.3 mm.

Head. Antenna with at least 32 flagellomeres (but apical segments missing); first flagellomere ca 1.3× length of second flagellomere. Face punctate, interspaces of punctures less than their diameter. Clypeus punctate, interspaces of punctures 1.0–1.5× their diameter, slightly convex, apical margin slightly curved. Malar space weakly granulose, ca 0.5× basal width of mandible. Upper tooth of mandible as long as lower tooth, with a very weak lamella. Frons granulose, median carina absent. Vertex granulose. Interocellar distance 2.0× ocello-ocular distance and 1.9× distance between median and lateral ocelli. Temple mat, ca 0.5× as long as eyes in lateral view. Occipital carina evenly arched, reaching hypostomal carina above mandible base.

Mesosoma. Pronotum rugose-punctate, rugae stronger laterally. Mesoscutum granulose-punctate, with rugae on notaulic region. Scutellum punctate. Metanotum rugose. Mesopleuron punctate, transversely striate below tegula, speculum smooth and shiny, interspaces of punctures of lower half of mesopleuron 1.0–2.0× their diameter. Metapleuron punctate, interspaces of punctures narrower than on mesopleuron and less than their diameter, rugose-punctate ventrally. Propodeum with area basalis trapezoid; anterior transverse carina away from base; area superomedia combined with area petiolaris, transversely striate; area superomedia ca 0.6× as long as width of area petiolaris; area externa rugose-punctate; area dentipara strongly rugose; area lateralis rugose to rugose-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 from its basal part. Marginal cell short, RS vein ca 2.0× longer than 2r&RS. Vein 1cu-a opposite of M&RS. External angles of second discal cell acute (80°). Hind wing with CU&cu-a reclivous, 2-CU not connected to CU&cu-a, not intercepted.

Legs. Hind femur 4.0× 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 3 slanting teeth basally, teeth short and small, ca 1.8× longer than arolium.

Metasoma. Surface somewhat coriaceous. First metasomal segment with 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 2.5× length of width of postpetiole; petiole ca 1.5× longer than postpetiole. Second tergite ca 0.7× as long as first tergite, as long as its apical width; thyridium oval, its distance from basal margin of tergite ca equal to its length. Third tergite ca 0.9× as long as its apical width. Ovipositor sheath ca 1.4× longer than hind femur, ca 1.6× longer than first metasomal segment, and ca 0.9× as long as hind tibia. Ovipositor slightly upcurved, with depth at mid-length less than width of hind first tarsomere.

Colour. Black. Mandible medially and palpi, yellowish brown; tegula yellowish; scape and pedicel blackish brown; fore leg yellowish brown except coxa brown; mid leg yellowish brown except coxa and from first tarsomere 0.5 on blackish brown; hind leg yellowish brown except coxa, trochanter and from first tarsomere 0.2 on black; metasoma entirely black.

Male. Antenna with 36–39 flagellomeres, clypeus with more densely punctate than in female, interspaces of punctures as wide as diameter of punctures or narrower; frons with median carina developed; mesopleuron rugose above episternal scrobe; lower half of mesopleuron with punctures larger and denser, interspaces as wide as diameter of punctures or narrower; metapleuron with punctures not distinctly different from that on mesopleuron; antenna brown to blackish brown; fore and mid coxae at least apically yellow.

Comparison. This species is similar to S. amphipoeae Kusigemati, 1993 , but differs from the latter by having first flagellomere ca 1.3× length of second flagellomere, frons granulose, pronotum rugose-punctate, propodeal area externa rugose-punctate, fore wing areolet with stalk short. S. amphipoeae : first flagellomere ca 0.7–0.8× length of second flagellomere, frons weakly and transversely striate, pronotum densely and weakly punctate, propodeal area external sparsely punctate, fore wing areolet small with a long stalk.

Etymology. Name derived from “petilus” (Latin for “thin”) and “dentis” (Latin for “tooth”), because its tooth is thin relative to other species in this genus.

Figures

FIGURE 7. Sinophorus petilidentis sp. nov., female, habitus, lateral aspect.

FIGURE 8. Sinophorus petilidentis 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.