Elachista eleochariella Stainton, 1851

small bog dwarf

mine

Mine upper-surface, starting a few cm under the tip of the leaf. A corridor first runs upwards, then doubles, widening all the while. The final part takes half the width of the leaf. The complete corridor is c. 6 cm long; except for the last centimetres it is completely filled with frass (Bland, 1996a). Pupation external; the pupa is attached to the rear of the leaf, without a cocoon.

Buhr (1964a) describes the mine on Eleocharis as follows: “The larva makes in the finest, almost bristle-like culms, descending from a spikelet, an almost full depth corridor in which only here and there a few green stripes remain. Frass very loose, in extremely fine dots of threads”.

hostplants

Cyperaceae, oligophagous

Eleocharis palustris; Eriophorum angustifolium, Carex flacca, nigra, panicea.

Traugott-Olsen & Nielsen (1977a) also mention Scirpus palustris, but this is not repeated by later authors.

Beavan & Heckford (2013a) reared the species from Carex nigra en panicea. They wonder if references to the other hostplants mentioned above are not due to confusion with Elachista albidella, that also has been bred from these hostplants, and cannot reliably be separated from albidella without a dissection of the genitalia.

phenology

Larvae in May (Traugott-Olsen & Nielsen, 1977a), June (Bland, 1996a).

BENELUX

BE not recorded (Fauna Europaea, 2010).

NE recorded (Huisman & Koster, 1998a; Microlepidoptera.nl, 2010).

LUX not recorded (Fauna Europaea, 2010).

distribution within Europe

From northern Europe to the Pyrenees and Alps, and from Ireland to Romania (Fauna Europaea, 2010).

larva, pupa

The larvan and pupa are described and illustrated by Beavan & Heckford (2013a).

synonyms

Biselachista eleochariella.

references

Baran (2005a), Beavan & Heckford (2013a), Bland (1996a), Buhr (1964a), Huemer & Wiesner (1997a), Huisman & Koster (1998a), Sruoga & Ivinskis (2011a), Kuchlein & de Vos (1999a), Parenti & Pizzolato (2015a), Parenti & Varalda (1994a), Pelham-Clinton (1988a), Pröse (1995a), Robbins (1991a), Schütze (1931a), Sruoga Ivinskis (2005a), Traugott-Olsen & Nielsen (1977a), Wegner (2010a), Wörz (1957a).

mod 26.ii.2018