Heterarthrus microcephalus (Klug, 1818)
Salix spec., Belgium, prov. Luxembourg, Durbuy, la vieille Briqueterie de Rome © Carina Van Steenwinkel
prepupa in cocoon (another leaf)
Salix caprea, Belgium, prov.Antwerp, Meerhout © Carina Van Steenwinkel: prepupa in cocoon
Salix cinerea, Reusel: mine with cocoon
Salix triandra, Amsterdam
Salix fragilis, Nederhorst den Berg
Salix viminalis, Nederhorst den Berg
Oviposition in the very leaf tip. From there a very deep upper surface blotch extends downwards. The blotch, that is very transparant, can occupy a large part of the leaf. Mostly the entire width of the leaf is mined out, but the broad leaves of the Goat Willow are mined at one side of the midrib only. Pupation within the mine in a large, transparent, discoidal cocoon.
Salix alba, aurita, caprea, cinerea, x fragilis, myrsinifolia, pentandra, phylicifolia, purpurea, repens, triandra, viminalis.
Larvae from July till September (Hering, 1957a), in two generations (Lorenz & Kraus, 1957a).
BE rcorded (Fauna Europaea, 2008).
NE recorded (van Ooststroom, 1976a).
LUX recorded (Chevin, Ellis & Schneider, 2011a).
distribution within Europe
From Scandinavia and Finland to the Pyrenees, Italy and Bulgaria, and from Ireland to Russia (Fauna Europaea, 2008).
Very young mines are still shallow and opaque, and can strongly resemble those of Agromyza albitarsis. The larvae of that species are maggots, and its mines are not associated with the leaf tip.
The lower picture above is unusual because the mine did not start at the utter leaf tip. (Two other mines of the same sample were normal.)
Altenhofer (2003a), Beiger (1979a), Beneš & Holuša (2015a), Blank ao (1998a), Buhr (1933a, 1941a, 1964a), Chevin, Ellis & Schneider (2011a), Drăghia (1972a, 1974a), Hering (1957a), Huber (1969a), Liston (1995b, 2007b), Liston, Mutanen & Viitasaari (2019a), Lorenz & Kraus (1957a), Michalska (1972a), Nowakowski (1954a), van Ooststroom (1976a), Pieronek (1962a), Pschorn-Walcher & Altenhofer (2000a), Robbins (1991a), Savina & Chevin (2012a), Schedl (2006a), Scobiola-Palade (1974a), Sønderup (1949a), Taeger, Blank & Liston (2006a), Taeger ao (1998a), Viramo (1969a), Wahlgren (1944a, 1963a), Zoerner (1969a, 1970a).