Phytomyza calthivora Hendel, 1934
After a short lower-surface beginning follows a quickly widening, upper-surface corridor that is strongly contorted, and runs from the leaf base towards the margin to widen there into a blotch. Corridor sides very irregular. Primary feeding lines well visible. Frass in pearl chains. Before pupation the larva leaves the mine through a large semicircular exit slit; however, the black puparium mostly remains stuck under the exit flap. Exit slit in lower epidermis (Pakalniškis, 2004a).
Larvae in May and June-July (Hering, 1957a).
Not known from the Benelux countries (Fauna Europaea, 2008).
distribution within Europe
From Norway to the Pyrenees and Czechia, and from the UK to Poland (Fauna Europaea, 2008).
de Meijere (1934a, as nigritella).
Phytomyza nigritella: auct.
Mines essentially in the lowest leaves that often are mud-covered and even may be submerged (Spencer, 1954a).
Andersen & Jonassen (1994a), Beiger (1965a, 1970a), Bland (1992b), Černý & Merz (2007a), Dreger & Myssura (2005a), Hering (1957a,b), Huber (1969a), de Meijere (1934a: 286), Michalska (1970a, 1976a), Nowakowski (1962b), Pakalniškis (2004a), Robbins (1991a), Sønderup (1949a), Spencer (1954a, 11972a, 1976a), Surányi (1942a), von Tschirnhaus (1999a).