Trichomalus campestris (Walker, 1834)

Razmi, Mehdi, Karimpour, Younes & Lotfalizadeh, Hossein, 2025, Bushgrass, Calamagrostis epigejos (Poaceae), a natural pool of chalcidoid wasps (Hymenoptera: Chalcidoidea) in Iran, Zootaxa 5696 (2), pp. 151-204 : 186-187

Trichomalus campestris (Walker, 1834)

Fig. 29

Material examined. 3 ♀♀: IRAN, West-Azarbaijan Province , Naqadeh, Solduz Wetland, 37º02′ N, 45º35′ E, 1277 m a.s.l., 21 July 2020, 29 April 2021, M. Razmi leg., ex Calamagrostis epigejos .

Diagnosis (abstracted from Graham 1969; Muller et al. 2007). Female ( Fig. 29A ): fore coxa reddish-testaceous ( Fig. 29A,F ); fore wing often with a dark fuscous discal cloud below marginal vein, with basal fold bare, marginal vein 1.1–1.5× length of stigmal vein, and costal cell setal line widely interrupted medially ( Fig. 29A,G ); flagellum with Fu 1 as broad as pedicel ( Fig. 29C ); metacoxa densely setose dorsobasally ( Fig. 29F ); propodeum median area 1.45–1.6× as broad as long ( Fig. 29E ); gaster 1.4–1.6× length of mesosoma, syntergum 0.8–0.9× as long as basal width.

We did not rear any males we identify as T. campestris .

Distribution. IRAN: East Azarbaijan Province ( Lotfalizadeh and Gharali 2008). EXTRALIMITAL: Europe, Turkey, United Kingdom, Wales ( UCD Community 2023).

Biological association. Thus far, Ceutorhynchus cardariae Korotyaev, 1992 ( Coleoptera : Curculionidae ) ( Muller et al. 2007) and species of the genus Apion Herbst, 1797 ( Coleoptera : Apionidae ) ( Lotfalizadeh and Gharali 2008; UCD Community 2023) have been documented as primary hosts of T. campestris in association with seven plant families. The present study constitutes the first confirmed record of this parasitoid in association with the family Poaceae .

Figures

FIGURE 29. Trichomalus campestris (Walker), female. A. Lateral habitus. B. Head and antennae in lateral view. C. Antenna. D. Head in frontal view. E. Head and mesosoma in dorsal view. F. Mesosoma in lateral view. G. Fore wing.