Phytomyza silai Hering, 1922
Silaum silaus, Belgium, prov. Namur, Philippeville, Sart-en-Fagne, RN Al Florée, 20.vi.2018 © Stéphane Claerebout
first section of the mine, upper side
final section of the mine, upper side
first section of the mine, underside; note the crossing of the midrib
final section of the mine, underside; the exit slit is obvious, but it cannot be decided on the photo if indeed it is upper-surface.
The mine starts with a lower-surface, relatively wide corridor. After its first moult the larva continues upper-surface, its mine in the end entirely occupying several leaf segments (Allen, 1956a; Hering, 1957a). Frass in rather coarse granules. Pupation outside the mine, exit slit in upper epidermis.
Mine in July-August (Allen, 1956a).
The pictures above concern the first record in the Benelux.
distribution within Europe
Britain, Germany, Poland (Fauna Europaea, 2008).
Allen (1957b); Hering (1957b).
Allen (1956a, 1957b), Hering (1957a,b), Huber (1969a), Kvičala (1938a), de Meijere (1937a, 1938a), Robbins (1991a), Skala & Zavřel (1945a), Spencer (1954b, 1971a, 1972a), von Tschirnhaus (1999a), Zoerner (1969a).