Acalitus phyllereus (Nalepa, 1919)

Acalitus phyllereus / Aceria bistriata: gall on Alnus incana

Alnus incana, Castricum

Acalitus phyllereus / Aceria bistriata: gall on Alnus incana

underside of the leaf, with erinea

Acalitus phyllereus / Aceria bistriata: detail of erineum

detail of the erineum

cf Acalitus phyllereus: galls on Alnus incana

Alnus incana, Balloërveld © Ben van As

cf Acalitus phyllereus: galls on Alnus incana

Alnus incana, France, Corsica, Haute Corse © Stéphane Claerebout

cf Acalitus phyllereus: galls on Alnus incana

the erineum mainly is epiphyllous

gall

The gall cannot be distinguished from the one by Aceria bistriata. (The identification of the pictures above therefore is tentative only). The gall reminds one of Acalitus brevitarsus, but the upperside of the leaf is not galled, and the hairs of the erineum are long and contorted, rather than short and mushroom-shaped.

hostplants

Betulaceae, monophagous

Alnus glutinosa, incana.

synonyms

Eriophyes brevitarsus phyllereus, Aceria brevitarsa phyllerea.

references

Béguinot (2002h, 2012a), Buhr (1964b), Fjelddalen (1995a), Hellrigl (2003a), Nalepa (1919a), Skoracka, Lewandowski & Boczek (2005a), Sylvén (1960a), Wahlgren (1963b), Weidner (1954a).

mod 1.x.2017