Ozirhincus millefolii (Wachtl, 1884)
on Achillea, ? Santolina
Achillea millefolium, Nieuwendam: opened capitulum; one galled floret is visible and below it the larva
capitulum after removal of most parts, leaving only the most central florets; two galled florets and some normal ones are visible
the galled florets form a chamber, occupied by the (single) larva
the three galled florets of the picture above
this presumably is an earlier stage of the same gall (material from the same inflorescence). The receptaculum has a central cavity, containing up the four yellow larvae.
Two or three generations. Hibernation and pupation in the gall.
Asteraceae,Anthemideae, narrowly oligophagous
In the revision by Dorchin ao (2015a) only Achillea millefolium and ptarmica are cited as host plants.
larvae and pupae are described by Dorchin ao (2015a).
Bruun, Jørgensen & Skuhravá (2012a), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Dorchin, Astrin, Bodner & Harris (2015a), Gagné (2010a), Mirumian (2011a), Redfern & Shirley (2011a), Roskam & Carbonelle (2015a), Simova-Tošić, Skuhravá & Skuhravý (1996a, 2000a), Simova-Tošić, Skuhravá, Skuhravý & Postolovski (2007a), Skuhravá (1989a), Skuhravá, Bayram, Çam ao (2005a), Skuhravá & Skuhravý (1994a, 1997a,b, 1999a,b, 2005c, 2008a, 2010a, 2012a), Skuhravá, Skuhravý, Blasco-Zumeta & Pujade-Villar (2006a), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý & Meyer (2014a), Skuhravá, Skuhravý, Skrzypczyńska & Szadziewski (2008a), Tomasi (2014a).