Tetrastichus flaccius, Hansson & Schmidt, 2020

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 flaccius sp. n.

Description

FEMALE holotype (Fig. 26). Body length 2.2 mm. Head. Width/length in dorsal view 2.3, width/length in frontal view 1.2, POL/OOL 1.9, widths head/mesosoma 1.0, mouth width/malar space nm, malar space/eye height 0.8. Antenna. Scape length/eye height 1.0, pedicel+flagellum length/mesosoma width 1.3, length/width F1, F2, F3 2.2, 2.3, 2.1, clava length/width 4.0, lengths pedicel/F1 0.6, lengths F1/F2 1.0, F1/F3 1.1, lengths F1, F2, F3/clava 0.6, 0.6, 0.5, widths F1/pedicel (dorsal view) 1.1, lengths antennal spicule/C3 0.2. Mesosoma. Length/width 1.6, mesoscutal mid-lobe length/width 1.1 (width measured in anterior part), mid-lobe with a weak median groove in posterior ⅔, with 4+5 adnotaular setae, lengths mesoscutum/mesoscutellum (measured medially) 1.4, mesoscutellum length/width 1.1, length/width of enclosed space between submedian grooves 3.1, distance between SMG/distance between SMG and SLG 1.3, lengths dorsellum/propodeum 0.6, propodeum with strong reticulation, propodeal callus with six setae. Fore wing. Costal cell length/width 9.0, lengths costal cell/marginal vein 1.0, lengths marginal/stigmal veins 2.7. Gaster. Ovate, length/width 1.5, lengths gaster/mesosoma 1.0, Gt7 length/width 0.5, length of longest cercal seta/next longest seta 1.5, longest cercal seta curved in apical ⅓, ovipositor sheaths not reaching apex of Gt7.

Colour. Body metallic greenish-blue, antenna dark brown, tegulae dark brown, wing venation yellowish-brown, coxae and femora concolorous with body, trochanters dark brown, tibiae yellowish-brown, fore tarsus brown, mid and hind tarsi yellowish-brown with T4 brown.

MALE. Unknown.

Diagnosis

Mesoscutellum 1.1 × as long as wide with enclosed area between submedian grooves 3.1 × as long as wide; length/width F1, F2, F3, clava 2.2, 2.3, 2.1, 4.0; fore wing with marginal vein 2.7 × as long as stigmal vein.

Distribution

Sweden.

Notes

Holotype deposited in SMTP.

Host

Unknown.

Material examined

Holotype ♀ "SWEDEN, Hälsingland, Hudiksvalls kommun, Stensjön, 62.054°N 16.172°E, 27.vii.2005, SMTP" (SMTP).