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16.013 Kessleria fasciapennella (Stainton, 1849)
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head of larva


Food Plant: Parnassia palustris (Grass of Parnassus)

Egg: on the leaf petiole or at the base of a leaf

Mine: June-July

Notes: Initially mines a leaf. The upper surface mine is usually adjacent to the leaf margin and gently sinuous with irregularly scattered frass (as shown, in vacated mines). Occasionally the mines may widen to form small blotches. After the leaf is mined the larva feeds, in a web, on the rosette leaves and stem. This web is made at the base of the plant, amongst the leaf litter and moss. The final instar larva is shown - note the black head and prothoracic plate, which differs from the description given by Kyrki (1985)(Description of the life history and immature stages of Kessleria fasciapennella and remarks on related species (Lepidoptera: Yponomeutidae s.str. : Notulae Entomologicae 65: 19-24). Kyrki states that the head and prothoracic plate are brown.

Data: 30.vii.2015, Meall Mór, Glencoe, Argyll, Scotland, VC 98

Image:© R. J. Heckford

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