Acalitus brevitarsus (Fockeu, 1890)

on Alnus

Acalitus brevitarsus galls

Alnus glutinosa, Nieuwendam

Acalitus brevitarsus gall

detail, upperside

underside

Acalitus brevitarsus: galls on Alnus glutinosa

Alnus glutinosa, Hungary, Kimle © László Érsek

Acalitus brevitarsus: galls on Alnus glutinosa

underside; picture mid-May

Acalitus brevitarsus: galls on Alnus glutinosa

picture in mid-July

Acalitus brevitarsus: galls on Alnus glutinosa

underside; the erineum starts to deteriorate

Acalitus brevitarsus: galls on Alnus glutinosa

unusually heavily infected leaf

Acalitus brevitarsus: mites

the mites are hardly visible

Acalitus brevitarsus erineum

Alnus glutinosa, Wellerlooi

Acalitus brevitarsus: erinea on Alnus cordata

Alnus cordata, Naarderbos: older erinea on this hostplant have an unusually bright red colour, and may be taken for a rust fungus

Acalitus brevitarsus on Alnus cordata: detail of erineum

Alnus cordata, Nieuwendam: detail of the erineum

Acalitus brevitarsus: detail of erineum on Alnus glutinosa

Alnus glutinosa, Bergen NH, Uilenvanger: under the microscope the strong branching of the hairs is apparent

Acalitus brevitarsus ??

Alnus glutinosa, France, Haute Savoie, Rhône Alpes, St. Nicolas de Véroce, 1175 m: very aberrant gall, possibly a different species; © Arnold Grosscurt

synonyms

Aceria, Eriophyes, brevitarsus.

hostplants

Betulaceae, monophagous

Alnus cordata, glutinosa, incana, x pubescens, viridis

notes

sometimes confusion may occur with Taphrina sadebeckii.

references

Abras, Fassotte, Chandelier & Cavelier (2008a), Béguinot (2002d,g, 2003a, 2006a,c, 2007b, 2012a), Bellmann (2012a), Braggion (2013a), Buhr (1064b), Chinery (2011a), Cogolludo (1921a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Ecott (2012a), Farkas (1965a), Fjelddalen (1995a), Groom (2011a), Hellrigl (2003a), Houard (1908a), Ilie & Marinescu (2011a), Jočić & Petanović (2012a), Keifer, Baker, Kono, Delfinado Styer (1982a), Kollár (2011a), Koops (2013a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon, Schneider & Feitz (2001a, 2012a), Lehmann & Flügel (2012a), Markovskaja (2013a), Nalepa (1919a), Petanović & Stanković (1999a), Redfern & Shirley (2011a), Ripka (2007a, 2010a), Ripka & de Lillo (1997a), Roivainen (1947a, 1950a, 1951a, 1953a), Roskam (2009a), Skoracka, Lewandowski & Boczek (2005a), Stănescu (2009a), Sylvén (1960a), Tomasi (2003a, 2014a), Weidner (1954a).

mod 19.vii.2018