Isocolus rogenhoferi Wachtl, 1880

on Centaurea

gall (from Eady & Quinlan, 1963a)

gall

Unilocular, hard, shining, oval swelling of the base of a bract, c. 8 x 4.5 mm in size. Also an achene can develop into a similar gall. Univoltine, pupation and hibernation in the gall.

host plants

Asteraceae, narrowly monophagous

Centaurea scabiosa.

synonyms

Aulax rogenhoferi. Nieves-Aldrey (2001a), not without some hesitation, considers rogenhoferi a synonym of I. scabiosae; this view is also taken in the Fauna Europaea (2013). However, because the galls are so very different, Redfern & Shirley argue to keep the two provisionally separate.

references

Béguinot (2000b), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Eady & Quinlan (1963a), Houard (1909a), Nieves-Aldrey (1984a, 2001a), Redfern & Shirley (2011a).