Plant Parasites of Europe

leafminers, galls and fungi

Phytomyza thymi

Phytomyza thymi Hering, 1928

Diptera, Agromyzidae

Phytomyza thymi mines

from Hering (1928b)


Mine upper-surface, a corridor, widening into a blotch. The corridor starts in the leaf base, between leaf margin and midrib. It ascends along the leaf margin to the tip, descends, and about halfway or somwehwat further down it forms a blotch. Frass in the corridor in coarse strings, dispersed in the blotch. Pupation external, exit slit in the upper epidermis.

When the vacated mine dries, the blotch with adjacent leaf margin drops out, giving the remainder of the leaf a characteristic half-elliptic excision. Looking for the mines is thereby made slightly easier.


Laminaceae, monophagous

Thymus alpestris, serpyllum.


Larvae in June.


Not known from the Benelux countries (Fauna Europaea, 2010).

distribution within Europe

From Lithuania to the Pyrenees, and from France to Poland (Fauna Europaea, 2010).




Beiger (1960a, 1965a), Buhr (1932a, 1964a), Černý & Merz (2007a), Dreger & Myssura (2005a), Hering (1928b, 1957a), Michalska (1970a), Skala & Zavřel (1945a), Sønderup (1949a), Spencer (1976a), von Tschirnhaus (1999a).


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