Thalictrum, meadow rue

Dichotomous table for leafminers

1a blotch mine => 2 *

1b corridor mine => 3

1c galls, etc => Tables for all parasites per species

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.

mod 9.x.2017