Agromyza alnivora Spencer, 1969
Alnus glutinosa, Hungary, Kimle, 26.vi.2018 © László Érsek
detail of the frass pattern with larva
Alnus glutinosa, Naardense Bos
same mine, lighted from behind
Alnus glutinosa, Amsterdam: part of the first stretch of the corridor
An upper-surface corridor, initially very shallow, gradually widening (often quite broad in the end), not associated with leaf margin or venation; mature mine often with a characteristic brown colouration. Frass in two rows, as usual in Agromyzidae. The gold-coloured larva leaves the mine before pupation, the semicircular exit slit is in the upper epidermis.
Alnus glutinosa, incana.
Larvae in June-October; bivoltine, according to Robbins (1991a).
BE observed (Chris Steeman, Paul Fontaine, 2007 in corr.)
NE Can be found in practically every clump of alder trees, but the number of mines per tree is mostly limited.
LUX observed (Ellis: Kautenbach, Dudelange).
distribution within Europe
From Scandinavia to France, and from the UK to Bulgaria (Fauna Europaea, 2007); also Corsica (Buhr, 1941b).
Agromyza albitarsis Zetterstedt, 1848, nec Meigen, 1830.
Until about 1970 is was believed that birch and alder shared the same Agromyza, viz. A. alnibetulae. Only then Spencer (1969a) discovered that alnibetulae as then understood was a mix of two species, A. alnibetulae Hendel living only on birch and A. alnivora only on Alder.
Abras, Fassotte, Chandelier & Cavelier (2008a), Ahr (1966a), Beiger (1979a), Beuk (2002a), Bland (1992b), Buhr (1932a, 1941b), Černý, Vála & Barták (2001a), Csóka (2003), Drăghia (1968a, 1972a, 1974a), van Frankenhuyzen & Houtman (1972a), van Frankenhuyzen Houtman & Kabos (1982a), Haase (1942a), Hartig (1939a), Hering (1957a), Huber (1969a), Kvičala (1938a), Maček (1999a), Matošević, Pernek, Dubravac & Barić (2009a), de Meijere (1924a, 1925a, 1939a), Michalska (1976a, 2003a), Nowakowski (1954a), Pakalniškis (1982b, 1990), Papp & Černý (2015a), Robbins (1991a), Skala & Zavřel (1945a), Sønderup (1949a), Spencer (1969a, 1971a, 1972a, 1976a), Starke (1942a), Starý (1930a), Surányi (1942a), von Tschirnhaus (1999a), Zoerner (1969a)