Diplolepis nervosa (Curtis, 1838)
spike pea gall wasp
on Rosa
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
opened gall
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.
host plants
Rosaceae, monophagous
Rosa agrestis, arvensis, balsamica, caesia, canina, centifolia, corymbifera, glauca, majalis, mollis, montana, moyesii, rubiginosa, sempervirens, spinosissima, villosa.
synonyms
Diplolepis, Rhodites, centifoliae Hartig, 1840; dispar Niblett, 1943; kiefferi Loiselle, 1912; rosarum Giraud, 1859.
inquilines
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), Güçlü, Hayat, Shorthouse & Tozlu (2008a), 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), Tavares (1905a), Tomasi (2012a, 2014a).