Dip:Agromyzidae
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Galiomyza violiphaga (Hendel, 1932)
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whitish upper surface blotch

Food Plant: Viola sp. including V.riviniana (Common dog-violet)

Recorded elsewhere: Viola ambigua, V.biflora (Alpine Yellow-violet), V.mirabilis, V.reichenbachiana (Early Dog-violet), V.silvatica, V.tricolor

Mine: Summer (August - Hering 1957)

Notes: Initially forms as a short linear section which then is largely subsumed into the large whitish upper surface blotch which develops. The frass is scattered in fine grains. The larva leaves the mine, by an exit slit in the upper epidermis, for pupariation and an orange puparium is formed. There may be several larvae in a mine. Widely distributed but uncommon. Mine shown on V.riviniana (Common dog-violet)

Recording Grade: 2

Data: 03.viii.2020, South Brent cemetery, South Devon, VC3

Image:© John Day

References:
Hering, M (1957) - Bestimmungstabellen der Blattminen von Europa.
Robbins, J (1990) - A Provisional Atlas of The Leaf Miners of Warwickshire.
Spencer, K A (1976) - The Agromyzidae of Fennoscandia and Denmark.
Spencer, K.A (1972) - "Diptera: Agromyzidae" Handbooks for the Identification of British Insects, Royal Entomological Society of London.

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