Trichochermes walkeri (Foerster, 1848)

on Rhamnus

Rhamnus cathartica, Hungary, Mosonmagyaróvár © László Érsek

length section through a gall

transverse section

larva

Trichochermes walkeri gall on Rhamnus cathartica

Rhamnus cathartica, Belgium, prov. Luxembourg, Resteigne; © Jean-Yves Baugnée

Trichochermes walkeri: gall on Rhamnus cathartica

Rhamnus cathartica, Duitsland, Beieren, Pfronten: the leaf margin is rolled upwards, and the underside of the leaf there often is strongly pilose; © Arnold Grosscurt

hostplants

Rhamnaceae, ± narrowly monophagous

Rhamnus cathartica.

References to Frangula alnus, R. saxatilis are doubted by Conci ao. They do not mention the records of Rhamnus alpina and erythroxylon by Hodkinson & White, but these too therefore are somewhat in doubt.

synonyms

Trichopsylla walkeri.

inquilines

In summer the vacated galls are occupied by Aphis commensalis.

references

Baugnée, Burckhardt & Fassotte (2002a), Béguinot (2002e,f,h, 2003b, 2005a, 2012a), Bellmann (2012a), Blackman & Eastop (2014), Buhr (1965a), Burckhardt (1983, 2002a), Chinery (2011a), Cogolludo (1921a), Conci, Rapisarda & Tamanini (1996a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Deckert & Deckert (2016a), Hellrigl (2004a), Hodkinson & White (1979a), Houard (1909a), Jerinić-Prodanović (2010a), Kollár (2011a), Koops (2013a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon & Schneider (2004a), Lauterer (1982a), Lehmann & Hannover (2016a), Ludwig (1974a), Malenkovský & Lauterer (2012a), Máca (2012a), Ossiannilsson (1992a), Ouvrard, Burckhardt & Cocquempot (2015a), Redfern & Shirley (2011a), Seljak (2006a), Stănescu (2009a), Tomasi (2003a, 2014a), White & Hodkinson (1982a).

mod 5.vii.2018