|
|
(Coleoptera, Diptera, Hymenoptera and Lepidoptera)
by
Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds
|
|
|
OXYRIA.
Mountain sorrel. [Polygonaceae]
|
Mountain
Sorrel (O. digyna) is the only species of Oxyria recorded
in Britain. It is a native species.
Three British miners are recorded on Oxyria.
A key to the European miners recorded on Oxyria is provided in Bladmineerders van Europa.
|
Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Oxyria
|
1a > Leaf-miner: Large upper side blotch or blister mine, which can start
with a short corridor. In small leaves the mine can be full depth
in places. Often several larvae in a mine; frass irregularly scattered
in large lumps. Pupation external. |
On Fallopia, Persicaria, Polygonum, Rumex and ? Begonia, but not yet on Oxyria, in Britain. On Begonia [Begoniaceae]
and other genera of Polygonaceae elsewhere. Widespread in Britain.
Also recorded in the Republic of Ireland. Widespread in continental
Europe. Also recorded in Morocco, Algeria, Tunisia, Syria, Israel,
Korea, China and Japan.
|
Pegomya
bicolor (Wiedemann, 1817) [Diptera: Anthomyiidae]. |
1b > Leaf-miner: Linear
mine, becoming a blotch. Two or more larvae feeding together. Frass
in lines.
At
the start of the mine on the leaf under surface a group of about
5 oval white egg shells (just 1 on the small leaves of Rumex
acetosella). The emerging larvae initally work shoulder to shoulder
in making a broad corridor. Later they split up, making a large
blotch, that often is enlarged even more by fusion with other mines.
The mine is practically full depth. Frass blackish-green, often
deliquescent. The larvae can leave a mine and restart elsewhere.
Pupation outside the mine.
The mine starts as a short corridor on the lower surface and then becomes a large upper surface blotch. Several larvae can mine together. |
|
|
Pegomya
solennis puparium
Image: © Willem Ellis (Bladmineerders van Europa) |
On
? Oxyria, ? Polygonum and Rumex in Britain
plus Emex and Persicaria elsewhere. Widespread in
Britain. Also recorded in the Republic of Ireland. Widespread
in continental Europe.
|
Pegomya
solennis (Meigen, 1826) [Diptera: Anthomyiidae]. |
1c > Leaf-miner: Initially
a gallery is formed, this turning into a blotch, and later two successive
conical leaf-rolls.
Initially a pale, later brown, usually lower-surface blotch. The
blotch is preceded by an epidermal corridor, but that may be obliterated
by the later blotch. Silk at the inside of the mine causes it to
buckle up a bit and fold. The reddish brown frass is accumulated
in a corner of the mine. The older larva leaves the mine and continues
feeding inside an untidy cone, made by cutting off a strip of leaf
tissue and stitching it in place with silk. |
|
|
On Fallopia, Lysimachia, Persicaria, Polygonum and Rumex, but not yet on Oxyria, in Britain and Chenopodium,
Lysimachia, Lythrum, Persicaria, Oxyria, Persicaria, Polygonum and Rumex elsewhere. Occurring locally in England, Scotland
and parts of Ireland. Widespread in continental Europe.
|
Calybites
phasianipennella (Hübner, 1813) [Lepidoptera: Gracillariidae].
|
|