Ctenophion Horstmann, 2010

Khalaim, A. I., 2019, Illustrated catalogue of North American species of Ctenophion Horstmann and Phradis Förster (Hymenoptera: Ichneumonidae: Tersilochinae), Russian Entomological Journal 28 (4), pp. 400-420 : 402-403

Genus Ctenophion Horstmann, 2010

Type species: Ctenophion niger Horstmann, 2010 .

DESCRIPTION.Relatively large species with body length 4.0– 5.5 mm. Head, in dorsal view, with gena roundly tapered behind eyes, almost as long as eye width. Antennal flagellum long, filiform, with 24–25 flagellomeres; several subbassal flagellomeres bear distinct finger-shaped structures on outer side near apex. Mandible with upper tooth about as long as lower tooth. Malar space longer than basal mandibular width. Clypeus broad, lenticular. Hypostomal carina obliterated.

Notaulus distinct, with irregular wrinkles. Epicnemial carina with upper end bent forwards and reaching front margin of mesopleuron slightly below middle of posterior margin of pronotum. Foveate groove broad and coarse, somewhat upcurved anteriorly, extending from epicnemial carina to base of mid coxa. Propodeum with coarse irregular rugae ( Fig. 6 ). Propodeal spiracle round, separated from pleural carina by about 3.0 times its own diameter.

Fore wing with second recurrent vein (2m-cu) interstitial, intercubitus (2rs-m) unusually long. First and second sections of radius (Rs+2r and Rs) meeting at obtuse angle. Second abscissa of postnervulus present, thus brachial cell is closed posteriorly. Hind wing with nervellus (cu1&cu-a) nearly vertical.

Legs slender. Hind leg with tibia much longer than femur; basitarsus short, about 0.4 times as long as tibia ( Fig. 7 ). Longer hind tibial spur almost straight, with distal end slightly curved. Tarsal claws distinctly pectinate.

Metasomal tergite 1 robust, depressed; glymma deep, situated in centre of first tergite, joining by furrow with ventral part of postpetiole; petiole entirely striate laterally before glymma. Ovipositor very short and robust, upcurved, with shallow dorsal subapical depression ( Fig. 8 ).

COMPOSITION. One species described from the Nearctic region and recently recorded from North Europe [ Khalaim, Várkonyi, 2018].

Figures

Figs 2–8. Ctenophion niger, paratype female: 2 — antennae, lateral view; 3 — head, front view; 4 — head, dorsal view; 5 — head and mesosoma, lateral view; 6 — propodeum, dorsolateral view; 7 — hind leg, lateral view; 8 — apex of metasoma with ovipositor, lateral view. Рис. 2–8. Ctenophion niger, паратип, самка: 2 — антенны, сбоку; 3 — голова, спереди; 4 — голова, сверху; 5 — голова и меЗосома, сбоку; 6 — проподеум, сверху и сбоку; 7 — ЗаднЯЯ нога, сбоку; 8 — верШина метасомы с Яйцекладом, сбоку.