Salix pentandra, UK, Orkney @ Derek Mayes
younger larva, lateral, to show the mottled feet
leaf margin, generally at one side only, sharply folded downwards, leaving only a narow space between the undersides. The leaf is not twisted lengthwise.
Salicaceae, narrowly monophagous
Salix glauca, pentandra, phylicifolia.
Maybe also, perhaps occasionally, S. lapponum and myrtylloides.
Phyllocolpa carinifrons (Benson, 1940); Phyllocolpa plicaglauca Kopelke, 2007; Phyllocolpa, Pontania, excavata auctorum.
Third abdominal segment with 4 dorsal annulets, 1-3 with setae. Suranal plate with widely separated pseudocerci. Last two segments dorsally with black markings, head almost black, thoracic legs marked with black.
On the top two picture it appears that locally the galls were very numerous. Derek Mayes told me that this was the case at least during the last four years. This perhaps explains why, contrary to what is stated in the literature, both sides of the leaf commonly are galled. As the lower of the two pictures demonstrates, the gall may appear as a sharp fold, but also as an inrolled leaf margin.
Member of the Euura oblita species group.
Beneš (2015a), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Kopelke (1999a, 2007a,c), Liston (2006a), Liston, Heibo, Prous ao (2017a), Liston, Taeger & Blank (2006a), Liston ao (2012a), Mol (2013), Nyman, Zinovjev, Vikberg & Farrell (2006a), Redfern & Shirley (2011a), Roller, Beneš, Blank ao (2006a), Roskam (2009a), Vikberg (1970a).