Acalitus stenaspis (Nalepa, 1891)
on Fagus

Fagus sylvatica, Castricum

Fagus sylvatica, Duin en Kruidberg

gall, cut open, with some long hairs, and mites

Fagus sylvatica, Dronten: exceptionally heavy infestation, © Arnold Grosscurt

Fagus sylvatica, Zweeloo: even stronger infestation © Arnold Grosscurt

underside
host plants
Fagaceae, monophagous
Fagus sylvatica, x taurica.
gall
another type of gall, caused by the same mite, means that the buds long remain closed and grow, attaining a size of op to 3 cm; the shoot that eventually appears is disfigured, the leaves are wavy, their venation is irregular, and they are covered by long hairs. Sometimes the shoot may overcome its parasites, then the younger leaves appear normal.
synonyms
Aceria, Eriophyes, blastophthira, stenaspis; Acalitus blastophthirus (Nalepa, 1917), Acalitus stenaspis blastophthirus.
inquilines
references
Abras, Fassotte, Chandelier & Cavelier (2008a), Béguinot (2001c, 2002e,g, 2005a, 2006a,c, 2007b), Bellmann (2012a), Buhr (1964b), Chinery (2011a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Farkas (1965a), Groom (2011a), Hellrigl (2003a), (“fagicolus”), Jočić & Petanović (2012a), Koops (2013a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon, Schneider & Feitz (2001a), Lehmann & Hannover (2016a), Máca (2012a), Petanović (1998a), Petanović & Stanković (1999a), Redfern & Shirley (2011a), Ripka (2007a), Roivainen (1953a), Roskam (2009a), Seidel (1957a), Skoracka, Lewandowski & Boczek (2005a), Stănescu (2009a), Sylvén (1960a), Tomasi (2003a, 2014a), Vaněčková-Skuhravá (1996a), Weidner (1954a), Xue, Wang, Song & Hong (2009a).