Diplolepis nervosa (Curtis, 1838)
spike pea gall wasp
Rosa sp., België, prov. Liège, Teril de Belle-Vue © Jean-Yves Baugnée
Rosa canina, Belgium, prov. Liège, Ocquier; © Chris Snyers
Rosa sp., Rijckholt, Savelsbosch
Rosa spec., Dronten; © Arnold Grosscurt
Rosa spec., Loenen (ge.) © Arnold Grosscurt: strangely aberrant 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.
Rosa canina, glauca, moyesii, rubiginosa.
Diplolepis, Rhodites, centifoliae Hartig, 1840; dispar Niblett, 1943; kiefferi Loiselle, 1912; rosarum Giraud, 1859.
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 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)
Bellmann (2012a), Buhr (1965a), Ceresa (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).