Gentianella germanica, Belgium, prov Namur, Nismes, RN les Abannets © Stéphane Claerebout

gall

In Swertia a short-oval to fusiform, up to 6 mm long gall in the petiole or the lower part of the stem; in Gentianella a rotund, barrel shaped or fusiform, up to 8 mm long stem gall. Larvae from mid-June to early September. Pupation in the soil; emergence after 2-3 weeks.

host plants

Gentianaceae, monophagous

Gentianella ciliata, germanica; Swertia perennis.

synonyms

The species is not mentioned in the Fauna Europa (2014), not in the synonymy either.

references

Benedikt, Borovec, Fremuth, ao (2010a), Buhr (1964c, 1965a), Dieckmann (1986a, 1990a), Rheinheimer & Hassler (2010a), Yunakov, Nazarenko, Filimonov & Volovnik (2018a).