Tetrastichus brachyopae Graham, 1991

Hansson, Christer & Schmidt, Stefan, 2020, A revision of European species of the genus Tetrastichus Haliday (Hymenoptera: Eulophidae) using integrative taxonomy, Biodiversity Data Journal 8, pp. 59177-59177 : 59177

Tetrastichus brachyopae Graham, 1991

Tetrastichus brachyopae Graham 1991:265-266. Holotype ♀ in NHM, examined (Fig. 6).

Description

See Graham (1991).

Diagnosis

Submedian grooves of mesoscutellum equidistant from each other and from sublateral grooves; female gaster with ovipositor sheaths projecting beyond apex of Gt7; female antennal funicle rather stout, its parts relatively short, F1 1.5-1.7 ×, F2 1.4-1.5 × as long as broad; male with relatively short setae on eyes, about 0.3 × OD.

Distribution

(Former) Czechoslovakia ( Graham 1991), The Netherlands ( van Eck et al. 2016) and Sweden ( Hedqvist 2003).

Ecology

Host

Gregarious koinobiont endoparasitoid on Brachyopa spp. ( Diptera : Syrphidae ), clutch size varying from 7-18 specimens, with a strong female bias ( van Eck et al. 2016). Recorded from Brachyopa pilosa Collin ( Graham 1991), B. bicolor ( Fallén) & B. insensilis Collin ( van Eck et al. 2016). In Sweden, collected at sap runs on Ulmus glabra and Carpinus betulus (R. Bygebjerg (MZLU), verbal communication).

Material examined

Type material: holotype ♀ (NHM, type no. 5.3628). Additional material (39♀ 3♂): the Netherlands 13♀ 3♂ (NHM), Sweden 26♀ (MZLU, NHM, ZSM).