Dusona nidulator is a species of parasitic wasp belonging to the family Ichneumonidae, subfamily Campopleginae.

Hind tibia yellowish red, often weakly marked with black basally, distinctly marked with black apically.

Petiole distinctly sculptured laterally in front of the deep glymmae, with long rows of transverse wrinkles or with irregular wrinkles.

Third gastral tergite separated from the epipleuron by a crease.

[2] Dusona nidulator is known from most of the palearctic region: Austria, Armenia, Azerbaijan, Belgium, Bulgaria, Belarus, Croatia, Czech Republic, Finland, France, Germany, Georgia, Italy, Latvia, Moldova, Netherlands, Norway, Poland, Romania, Russia (including east Siberia), Slovakia, Sweden, Switzerland, Turkey, Ukraine and United Kingdom.