Aceria carinifex (Kieffer, 1902)
Acer campestre, Hungary, Budapest © László Érsek
laef with p to 1.5 cm long, slender depressions, open to the upperside with a narrow slit; at the underside of the leaf the gall forms a keel. At the inside white, later brown, cylindrical, spiralled hairs.
Sapindaceae, narrowly monophagous
Aceria macrochela crassipunctata (Nalepa, 1909).
the identification of the pictures above is somewahat hestiant, because the gall is less deep and slender, nor narrowed above to a slit, as is described in the literature.
Béguinot (2002f, 2003a, 2006b, 2012a), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Farkas (1965a), Ripka (2007a), Stănescu (2009a).