Phytomyza continua Hendel, 1920
In Burdock the species bores in the petioles, and in Chicory it is a root borer, but in thistles it mainly lives in the base of the midrib, making from there brief excursions into the blade. The midrib swells somewhat, gall-like, and obtains a somewhat darker shade. The gall contains one or more larvae. Pupation takes place within the mine.
Larvae from March (Hering, 1957a).
BE recorded (Scheirs, De Bruyn & von Tschirnhaus, 1996a).
NE not recorded (Fauna Europaea, 2008).
LUX not recorded (Fauna Europaea, 2008).
distribution within Europe
From Scandinavia and Finland to Spain and Italy, and from the UK to Lithuania, Poland and Austria (Fauna Europaea, 2008).
Described by Dempewolf (2001a).
Described and depicted by de Meijere (1934a); unusually large.
Phytomyza cardui Hering, 1943; Ph. polyarthrocera Frey, 1946; Ph. zetterstedti Rydén, 1951, nec Schiner, 1864; Ph. zetterstedtiana Rydén, 1953.
Robbins (1991a) attributes short corridors in the blade pf Burdock that end upon a thick vein (thence continuing as tunnels) to Melanagromyza lappae (Loew). However, according to Dempewolf (pers. comm.) this probably is the work of Ph. continua.
Andersen & Jonassen (1994a), Buhr (1964b), Černý (2001a, 2007a, 2011a), Černý & Merz (2006a, 2007a), Černý & Vála (1999a), Černý, Vála & Barták (2001a), Ci̇velek, Çikman & Dursun (2008a), Dempewolf (2001a), Hering (1943a, 1957a), de Meijere (1934a), Pakalniškis (1998a), Robbins (1991a), Scheirs, De Bruyn & von Tschirnhaus (1996a), Spencer (1972a,b, 1976a), Spooner & Bowdrey (2012a), Süss (1982a), Tomasi (2014a), von Tschirnhaus (1999a).