The genus Aphelenchoides is composed of about 150 species which are difficult to identify because identification keys are lacking, due to the high number of insufficiently described species. Aphelenchoides-species are found in every soil where they feed on soil fungi. In the Netherlands, three species occur which feed on the aboveground parts on higher plants and cause considerable damage; they live in the buds of for example strawberry where they damage the developing leaves. In Doronicum leaves, A. ritzemabosi causes a characteristic symptom. Living in the leaves, they cause a mosaic pattern of healthy and damaged tissue.