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rowan, whitebeam & wild service tree (Sorbus)
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Nepticulidae
1 A slender sinuous galley leading to a large roundish blotch [6] Stigmella sorbi 66
  A gallery throughout the whole of the mine 2
2 Mine on Wild Service tree (Sorbus torminalis) 3
  Mine on Rowan (Sorbus aucuparia) 4
3 Mine starts relatively straight, slender gallery, becoming contorted with linear frass, later widening almost to a blotch, larva pale yellow [7] Stigmella torminalis 106
  Mine long and sinuous with dispersed frass, larvae green [9-10] Stigmella oxyacanthella 100
4 Mine narrow, less than 1.5mm, frass linear leaving clear margins, usually confined to a small area, but occasionally follows leaf margin [7-8] Stigmella magdalenae 104
  Mine wider, more than 1.5mm, frass dispersed may be coiled, a long contorted gallery which may follow leaf margin [6-8] Stigmella nylandriella 103
   N.B. Intermediate forms of these mines do occur and these can be difficult to distinguish.
It should also be noted that Stigmella oxyacanthella has also been known to feed on Rowan and has a mine similar to S. nylandriella, however occupied mines should present no problem as S. oxyacanthella feeds during September and October.
Lyonetiidae
Mine a brown circular blotch with the frass forming darker spiral markings in the centre. Egg laid well away from margin. On Wild Service tree [8-9] Leucoptera malifoliella 260
Mine a long sinuous gallery, often whitish in appearance and often crossing midrib. The egg is laid inside the leaf being injected through the epidermal layer. This feature helps to distinguish it from a Nepticulid mine where the egg is laid on the surface of the leaf [5+7+9-10] Lyonetia clerkella 263
Bucculatricidae
Mine short contorted, linear black, close to a major vein. Later the larva eats out windows from upperside (on Rowan and Wild Service Trees) [7-8] Bucculatrix bechsteinella 275
Gracillariidae
1 Mine a blotch on upperside of leaf 2
  Mine on underside of leaf 3
2 Blotch anywhere on upper surface of leaf, flecked with blackish frass [7+9-10] Phyllonorycter corylifoliella 332
  Blotch over midrib, silvery [7+10-4] Phyllonorycter leucographella 332a
3 Mine approx 5-8mm long, lower epidermis turning grey or brown; larvae feeds later in a folded leaf or cone 4
  Mine narrow and approx 20-30mm long, lower epidermis remains green; larva mines throughout 5
4 Larva feeds later in a cone on the leaf margin; mainly on Wild Service-tree [7+8-9] Parornix anglicella 303
  Larva feeds later in a folded leaf edge or in a centrally placed tight pleat that resembles a mine. (On all three species) [7+8-9] Parornix scoticella 305
5 Mine on Wild Service-tree 6
  Mine on Rowan or Whitebeam (Sorbus aria) 7
6 Mine with lower epidermis having many longitudinal creases; pupae in very pale brown loose silken chamber; frass in a long line behind the cocoon (most common species on Wild Service-tree) [7+9-11] Phyllonorycter mespilella 325
  Mine with lower epidermis with one large fold, pupa in a white silk lined chamber with the frass heaped behind the cocoon (rarely found on Wild Service-tree) [6-7+9-10]

Phyllonorycter cydoniella 327

7 Mine on Rowan 8
  Mine on Whitebeam 10
8 Pupa in a silk-lined chamber with out a real cocoon with very little frass 9
  Pupa in a strong whitish cocoon with the frass heaped near the middle of the mine; mine along midrib or leaf-edge strongly contorting leaf (commonest species on Rowan)
[6-7+9-10]
Phyllonorycter sorbi 324
9 Mine with lower epidermis having many longitudinal creases; pupae in very pale brown loose silken chamber; frass in a long line behind the cocoon (infrequent on Rowan [7+9-11]
Phyllonorycter mespilella 325
  Very rarely found on Rowan [7+9-4] Phyllonorycter lantanella 331
10 Mine with lower epidermis having many longitudinal creases; pupae in very pale brown loose silken chamber; frass in a long line behind the cocoon (frequent on Whitebeam) [7+9-11] Phyllonorycter mespilella 325
  Pupa in a strong whitish cocoon with the frass heaped near the middle of the mine; mine along midrib or leaf-edge strongly contorting leaf (rarely found on Whitebeam) [6-7+
9-10]
Phyllonorycter sorbi 324

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