Tetrastichus polyporinus Askew, 2007

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 polyporinus Askew, 2007

Tetrastichus polyporinus Askew 2007:233-234. Holotype ♀ in NHM, examined (Fig. 86).

Description

Female, see Askew (2007).

MALE. Body length 1.7 mm. Head. Width/length in dorsal view 2.6, width/length in frontal view 1.4, eye height/malar space 1.5, mouth width/malar space 1.5, widths head/mesosoma 1.1. Antenna. F1-F4 with basal whorls of setae, reaching beyond apex of corresponding flagellomere, scape length/eye height 1.0, scape length/width 2.5, ventral plaque placed in central part of scape, lengths ventral plaque/scape 0.7, pedicel+flagellum length/mesosoma width 1.5, length/width F1, F2, F3, F4 1.7, 1.9, 2.0, 2.0, clava length/width 4.9, lengths pedicel/F1 0.8, lengths F1/F2 0.9, F1/F3 0.9, F1/F4 0.9, lengths F1, F2, F3, F4/clava 0.4, 0.4, 0.5, 0.5.

Colour. Body with weak metallic blue tinges, entire antenna dark brown, tegulae dark brown, wing venation yellowish-brown to brown, coxae concolorous with body, trochanters and femora dark brown, tibiae and tarsi yellowish-brown.

Diagnosis

Mouth opening 1.3-1.5 × malar space; female antenna: flagellum short, for example, F3 at most 1.1 × as long as wide, sometimes transverse and clava (incl. spicule) 2.5 × as long as wide; male antenna: length of whorled setae on funiculars at least 1.4 × the length of funicular attached to; F4 2.0 × as long as wide; body black with very weak blue tinges.

Distribution

France, Germany ( Askew 2007), Romania and Sweden (new records).

Ecology

Host

Possibly Dacne sp. ( Askew 2007); Triplax rufipes Fabricius and T. russica (L.) new records. All hosts are Coleoptera : Erotylidae .

Material examined

Type material: holotype ♀ (NHM, type no. 5.4457). Additional material (23♀ 3♂): France 11♀ 3♂ ex Triplax russica from Polyporus sp. on Fraxinus (G), Romania 2♀ (MZLU, NHM), Sweden 10♀ ex Triplax rufipes (NHM).