File talk:Pemphigus bursarius (Kemplich 14).JPG

This is not the gall of P. bursarius, but that of another species in the genus: P. populinigrae, P. gairii or P. phenax. P. bursarius is very well known (it's a pets of Lettuce) and galls the petiole forming a little pouch or purse (hence it's name). Semudobia (talk) 12:52, 10 November 2017 (UTC)