Stigmella dryadella (Hofmann, 1868)

mountain-avens pigmy

Stigmella dryadella mine

Dryas octopetala, Austria, 1600 m; from Klimesch (1981a)

mine

Egg on the leaf margin or the underside of the leaf. The mine is a corridor, narrow at first, for about 10 mm descending towards the base of the leaf, meticulously following the leaf margin. Then the corridor reverses its direction, and widens into al blotch that may occupy half of the leaf, to the midrib. Frass in the corridor as a broad central ribbon; broadly scattered in the blotch.

hostplants

Rosaceae, monophagous

Dryas octopetala.

phenology

One or two generations, according to the region and altitude; in some regions the larvae hibernate in their mines (Johansson ea, 1999a).

BENELUX

Not known from the Benelux countries (Fauna Europaea, 2009).

distribution within Europe

From Fennoscandia and North Russia to the Pyrenees and Italy, and from Ireland to Romania (Fauna Europaea, 2009); 1100 – 2450 m (Huemer, 1985a).

larva

Yellow, head dark brown (Emmet, 1983a).

references

Bengtsson (2008a), Emmet (1983a), Gustafsson (1985a), Hartig (1939a), Hering (1957a), Huemer (1985a, 1988a), Johansson ao (1990a), Klimesch (1950c, 1981a), Klimesch & Skala (1936c), A & Z Laštuvka (1997a), van Nieukerken (1986a), van Nieukerken, A & Z Laštuvka (2006a), van Nieukerken, Mutanen & Doorenweerd (2012a), Pelham-Clinton (1967a), Skala (1939a), Viramo (1974a).

08/04/2017

mod 18.ii.2018