Thalictrum meadow rue
(For a dichotomous table for galls on Thalictrum by Hans Roskam click here)
Dichotomous table for leafminers
Dichotomous table for leafminers
2a mine small, begins in the tip of a leaf segment at a spot that is opaque in transparancy: Phytomyza thalictricola
2b mijn large, beginning at an opaque spot in the centre of the leaf: Phytomyza aquilegiae
3a frass in the first part of the mine in loose grains; mine broad, < 7 cm long: Phytomyza minuscula
3b frass in the entire mine in strings, > 7 cm long, beginning narrow, gradually widening => 4
4a corridor begins at lower surface, epidermally, later becoming upper-surface: Phytomyza albifrons
4b corridor upper-surface over its entire length: Liriomyza thalictri
* See also the recently described Phytomyza camuna.