Acalitus stenaspis (Nalepa, 1891)

on Fagus

Acalitus stenaspis gall

Fagus sylvatica, Castricum

Acalitus stenaspis gall

Fagus sylvatica, Duin en Kruidberg

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

Acalitus stenaspis gall of Fagus sylvatica

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

Acalitus stenaspis: extreme infestation of Fagus sylvatica

Fagus sylvatica, Zweeloo: even stronger infestation © Arnold Grosscurt

Acalitus stenaspis: extreme infestation of Fagus sylvatica

underside

hostplants

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, stenaspis; Acalitus blastophthirus (Nalepa, 1917), Acalitus stenaspis blastophthirus.

inquilines

Arthrocnodax gemmarum.

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), Weidner (1954a).

mod 19.vii.2018