Phyllonorycter geniculella (Ragonot, 1874)
sycamore midget
on Acer
Acer pseudoplatanus, Hungary, Mosonmagyaróvár, 28.v.2020 Érsek
opened mine with larva
larva, dorsal
detail of head and thorax, dorsal …
… and lateral

Acer pseudoplatanus, Flevoland, Reve-Abbertbos © Hans Jonkman: mine on the lamina

same mine, underside (with drops of water inside)

mine along the leaf margin

same mine, underside

Acer pseudoplatanus, Amsterdam; lighted from behind

Acer pseudoplatanus, Nieuw-Bergen; opened mine


Acer pseudoplatanus, Castricum; very young mine with, right picture, the iridescent egg shell at the start
mine
The mine begins as an inconspicuous lower surface epidermal corridor, beginning at an iridescent egg shell. This corridor is followed, and mostly replaced, by a relatively small, lower-surface, tentiform mine with many weak folds. When the mine happens to lie close to the leaf margin the leaf may fold downwards over the mine. Pupa in the mine, dark brownish black, in a loosely spun cocoon. Frass heaped in a corner of the mine.
host plants
Sapindaceae, narrowly monophagous
Acer pseudoplatanus.
Buhr (1935a) additionally mentions Acer saccharinum.
phenology
Larvae in May – July, and September – October.
BENELUX
BE recorded (Phegea, 2009).
NE recorded (Kuchlein & de Vos, 1999a; Microlepidoptera.nl, 2009).
LUX recorded (Ellis: Kautenbach).
distribution within Europe
From Sweden to the Pyrenees, Italy, and Bulgaria, and from Britain to South Russia (Fauna Europaea, 2009).
larva
pop
synonyms
Lithocolletis geniculella; L. dahmiella (Sorhagen, 1900); Lithocolletis, Phyllonorycter acernella: auct.
parasitoids, predators
Achrysocharoides acerianus; Sympiesis gordius, sericeicornis.
references
Ahr (1966a), Bengtsson & Johansson (2011a), Buhr (1935a, 1964a), Buszko (1992b), Csóka (2003a), Deschka & Wimmer (2000a), Deutsch (2012a), Deutschmann (2008a), Emmet, Watkinson & Wilson (1985a), van Frankenhuyzen & Houtman (1972a), van Frankenhuyzen, Houtman & Kabos (1982a), Gregor & Patočka (2001a), Gregor & Povolný (1950a), Haase (1942a), Hering (1931a, 1934b, 1957a, 1961a), Huemer (1986b), Huemer & Erlebach (2003a), Jaworski (2009a), Kasy (1983a, 1987a), Kollár (2007a), Kuchlein & Donner (1993a), Kuchlein & de Vos (1999a), Maček (1999a), Matošević, Pernek, Dubravac & Barić (2009a), Nel & Varenne (2014a), Nowakowski (1954a), Patočka & Turčáni (2005a), Plóciennik, Pawlikiewicz & Jaworski (2011a), Robbins (1991a), Sefrová (2005a), Skala (1941a), Sønderup (1949a), Starý (1930a), Szőcs (1977a, 1978a, 1981a), Tomov & Krusteva (2007a), Wieser (2005a).