Rosa sp., België, prov. Liège, Teril de Belle-Vue © Jean-Yves Baugnée

Rosa spec., Loenen (ge.) © Arnold Grosscurt: strangely aberrant gall

gall

This gall comes in two forms: with spines (and is unmistakable then) but also completely smooth (and then without breeding undistinguishable from Diplolepis eglanteriae). Univoltine; hibernation and pupation in the gall.

hostplants

Rosaceae, monophagous

Rosa agrestis, arvensis, balsamica, caesia, canina, centifolia, corymbifera, glauca, montana, moyesii, rubiginosa, sempervirens, spinosissima, villosa.

synonyms

Diplolepis, Rhodites, centifoliae Hartig, 1840; dispar Niblett, 1943; kiefferi Loiselle, 1912; rosarum Giraud, 1859.

inquilines

Periclistus caninae.

notes

Hans Jonkman found in the Roggebotbos (province of Flevoland), next to the typical D. nervosa galls also numerous aberrant galls. They belonged to the D. eglanteriae type (without large spines) but differed in being covered with glandular hairs, that often were connected by low ridges. In older galls the glandular hairs had been transformed into low warts.

Rosa spec., Dronten, Roggebotbos © Hans Jonkman: typical D. nervosa

a typical nervosa and some unknown galls of the eglanteriae type.

eglanteriae type

eglanteriae type with low ridges

here the ridges are more clearly expressed

old (?) gall with low warts

the same unusual type of gall, in the same forest, but photo taken by another observer (© Arnold Grosscurt) and four years earlier (2013)

references

Bellmann (2012a), Buhr (1965a), Cerasa (2015a), Chinery (2011a), Dauphin & Aniotsbehere (1997a), Eady & Quinlan (1963a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Koops (2013a), Kwast (2012a, 2014a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon Schneider & Feitz (2012a), Lehmann & Hannover (2016a), Marković (2014a), Melika (2006a), Nieves-Aldrey (2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2012a, 2014a).