Gnotus tenuipes (Gravenhorst, 1829)

Verheyde, Fons, Hoekstra, Paul, Libert, Pierre-Nicolas, Meijer, Hilco, Ketelaere, Augustijn De, Vandaudenard, Thibaud, Belgers, Dick & Brosens, Edwin, 1880, Two hundred and five ichneumonid wasps reported for the first time in Belgium and the Netherlands (Hymenoptera: Ichneumonidae), Belgian Journal of Entomology 122, pp. 1-142 : 95

Gnotus tenuipes (Gravenhorst, 1829)

Gnotus spp. can be identified within Phygadeuontinae on the basis of their fully developed wings, their incomplete transverse carina (on mesosternum), the presence of a closed areolet, the lower tooth, which is a lot shorter than the upper tooth (0.3-0.6x as long), the absence of teeth on the apical margin of the clypeus and the occipital carina joining the oral carina at the base of the mandible ( TOWNES, 1970a; HORSTMANN, 1993).

Gnotus tenuipes has a shiny and finely punctuated mesoscutum. Its nervellus is vertical or reclivate. It is hard to distinguish this species from G. czekelii (Kiss, 1924) . One difference is the colouration of the legs, which is more or less reddish in the former and blackish in the latter (more details see HORSTMANN, 1993). Its presence could be expected in the Netherlands, with the species being very widely distributed in Western Europe (see for example FAUNA EUROPAEA) and several common arachnid and lepidopteran hosts (see YU et al., 2012).

First report for the Netherlands; unconfirmed in Belgium.

MATERIAL EXAMINED:

THE NETHERLANDS: • 1 ♂; Drachten (FR); 53°05’59”N 6°06’32”E; 28/v/2020; H. Meijer leg.; coll. HM; light trap; H. Meijer det. • 1 ♀; Drachten (FR); 53°05’59”N 6°06’32”E; 3/vi/2020; H. Meijer leg.; coll. HM; field observation; H. Meijer det.