Minotetrastichus treron Graham, 1987

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 : 168

Minotetrastichus treron Graham, 1987

Fig. 13

Material examined. 2 ♀♀: 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 1987). Females ( Fig. 13A ) differ from related species in the following characters: fore wing 2.15‒2.35× as long as wide with marginal vein 3.15‒3.70× as long as stigmal vein ( Fig. 13D ), mesosoma 1.7‒1.8× as long as wide ( Fig. 13C ); propodeal spiracles separated by slightly more than their diameter from hind margin of metanotum. In addition the body is predominantly black with a green metallic sheen and typically the face is partially yellow, along with yellow orbits, prepectus, upper angle of mesopleuron, and approximately basal third of gaster. In some specimens, the posterior margins of the mid lobe of the mesoscutum and the scapulae also exhibit a yellowish coloration. Other color attributes are: legs yellow, with metacoxa primarily black and fourth tarsomere of all legs brownish ( Fig. 13A ); antennal scape and pedicel yellowish, with dorsal surface brown, while the funicle ranges from testaceous to light brown and appearing darker dorsally ( Fig. 13B,E ); tegula yellow; wings tending to have a slight yellowish tint, with venation ranging from testaceous to brownish. Body length ranging from 0.9‒1.1 mm.

We did not rear any males we identify as M. treron .

Distribution. IRAN: West Azarbaijan Province ( new record). EXTRALIMITAL: EUROPE ( UCD COMMUNITY 2023).

Biological association. The hosts of this species remain unknown; however, it appears that species of this genus are parasitoids of Agromyzidae , Tenthredinidae ( Hymenoptera ), Gracillariidae , and Lyonetiidae ( Lepidoptera ). These interactions typically occur on plants belonging to Betulaceae , Hippocastanaceae , and Rosaceae ( UCD Community 2023) .

Figures

FIGURE 13. Minotetrastichus treron Graham, female. A. lateral habitus. B. Mesosoma in dorsal view. C. Fore wing. D. Head and antenna in frontal view. E. Head and antennae in lateral view.