Phytoliriomyza hilarella (Zetterstedt, 1848)
Pteridium aquilinum, Belgium, prov. Liège, Ougrée: larva in the mine; © Jen-Yves Baugnée
Pteridium aquilinum, Grebbeberg
Pteridium aquilinum, Grebbeberg: an unusual image: the mine extends over three pinnulae
Short broad gallery, almost always limited to one leaf segment (pinnula), usually forming a secondary blotch in the end. Pupation outside the mine.
Dennstaedtiaceae, monophagous (?)
Mines found from June to September.
BE recorded (Ellis: Sinnich).
NE recorded (de Meijere, 1911a).
LUX not recorded (Fauna Europaea, 2008).
distribution within Europe
From Scandinavia to Austria, and from the UK to Poland (Fauna Europaea, 2008).
Phytobia, Pteridomyza, Dizygomyza hilarella.
Spencer (1973a), basing himself on material from the UK, Germany, Slovenia and Montenegro, described a new species, Ph. pteridii, closely related to hilarella. Only the adult stage is known of pteridii. De Meijere writes that the rear spiraculum of hilarella has 15-18 papillae “but sometimes less”, while according to Spencer the rear spiraculum of hilarella has 12-15 papillae. It is not clear whether de Meijere described true variation of hilarella or had a mix of two species before him. As far as I know no adult material of pteridii has been found in the Benelux so far. Nevertheless the larvae photographed here look rather different, and it does not seem inconceivable that the “Bunderbos type” and the “Grebberg type” each belong to one of the two species.
Andersen (2016a), Andersen & Jonassen (1994a), Beuk (2002a), Buhr (1932a, 1941b, 1964a), Černý (2007a), Černý, Andrade, Gonçalves & von Tschirnhaus (2018a), van Frankenhuyzen Houtman & Kabos (1982a), Hering (1955b, 1957a), Huber (1969a), Kabos (1971a), de Meijere (1911a, 1924a, 1925a, 1939a), Michna (1975a), Nowakowski (1954a), Papp & Černý (2018a), Robbins (1991a), Skala (1936a), Sønderup (1949a), Spencer (1972a, 1973a, 1976a), Starke (1942a), Starý (1930a), von Tschirnhaus (1999a), Zoerner (1969a, 1970a).