Cytisus scoparius, Belgium, prov. Luxembourg, Arlon, Camp militaire de Lagland; leg Sébastien Carbonnelle © Stéphane Claerebout

larva in the gall

gall

axillary bud changed into a egg-shaped gall with a remarkably long tapering tip; the gall measures up to one cm, and mostly (?) is long, patently hairy. The gall chamber is lined with mycelium. Larva solitary, pupates in the gall.

host plants

Fabaceae, narrowly monophagous

Cytisus scoparius.

larva

spatula (from Kieffer, 1901a)

pupa

head of the pupa, to show the pair of frontal teeth (from Rübsaamen, 1916b)

synonyms

Ischnonyx pilosa Ruebsaamen, 1916.

notes

The gall illustrated above is shaped exactly like A. pilosa, but is completely hairlesss. An examination of the larval spatulas, that according to Harris (2002a) show clear differences, effectively did point to pilosa.

references

Béguinot (2006a,b, 2007b), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1965a), Chinery (2011a), Gagné (2010a), Docters van Leeuwen (1936a), Harris (2002a, 2004a), Houard (1908a), Kieffer (1901a), Markin & Horning (2010a), Redfern & Shirley (2011a), Roskam (2009a), Roskam & Carbonnelle (2015a), Rübsaamen (1916b), Skuhravá (1989a), Skuhravá & Skuhravý (2021a: 90), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý & Meyer (2014a).