Stigmella salicis

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Stigmella salicis
Stigmella salicis, Anglesey, North Wales, 2014 (20793105860).jpg
Stigmella salicis genitalic preparation
Scientific classification
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S. salicis
Binomial name
Stigmella salicis
(Stainton, 1854)
Synonyms
  • Nepticula salicisStainton, 1854
  • Nepticula arbusculaeKlimesch, 1951
  • Nepticula auritellaSkala, 1939
  • Nepticula dewitziellaSorhagen, 1885
  • Nepticula libieziDufrane, 1949
  • Nepticula salicellaHerrich-Schaffer, 1855
  • Nepticula salicivorellaDoubleday, 1859
  • Nepticula uniformisHeinemann, 1871

Stigmella salicis is a moth of the family Nepticulidae which is found in Europe. It was first described by the English entomologist, Henry Stainton in 1854. The type locality is from England.

Contents

Description

The wingspan is 4–6 millimetres (0.16–0.24 in)The thick erect hairs on the head vertex are ferruginous-orange. The collar is paler. Antennal eyecaps are whitish. The front wings are fuscous or dark fuscous, faintly purplish-tinged, somewhat sprinkled with pale yellowish ; an ochreous-whitish rather oblique fascia beyond middle; apical area beyond this sometimes more blackish ; outer half of cilia ochreous-white. Hindwings grey. [1]

The moth is bivoltine (i.e. has two generations a year). In Great Britain adults are on wing from April to May and again from July to August. The flight period may be different in other parts of its range. The type locality is from England. [2]

Life cycle

Egg

Eggs are laid on the underside of a rough-leaved willow leaf, usually concealed in the down close to a rib and can be found in May and August to September. [2] [3]

Larva

Larva, feed internally within a leaf and are amber-yellow with a pale brown head. [4] They can be found in June and July and again from September to November. [5]

Mine showing the frass Stigmella salicis mine, Gronant dunes, North Wales, Sept 2015 (21626088096).jpg
Mine showing the frass

They mine the leaves of their host plant, in a gallery which can be variable and highly contorted. The mine starts comparatively wide and is initially almost filled with frass. Later there are clear margins and the frass becomes broken. The mine can follow a leaf margin, a rib or can be highly contorted. It later widens to form a blotch, or if highly contorted with 'S' bends, a false blotch. [2] The larvae feed on Myrica gale [a 1] , Salix alba , Salix atrocinerea , Salix aurita , Salix babylonica , Salix caprea , Salix cinerea , Salix daphnoides , Salix fragilis , Salix lanata , Salix pentandra , Salix purpurea , Salix repens , Salix silesiaca , Salix triandra and Salix viminalis . [5] Mines on the narrow-leaved willows can be difficult to distinguish from those of S. obliquella. [3]

Pupa

The pupa is in a yellowish-brown cocoon spun in detritus and can be found in July and August, and from November through to April. [3]

Distribution

S. salicis is found in Europe (except Iceland and Greece). [6]

Note

  1. Occasionally occurs on Myrica (Myricaceae).

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References

  1. Meyrick, E., 1895 A Handbook of British Lepidoptera MacMillan, London
  2. 1 2 3 Emmet, A M (1983). Heath, John (ed.). The Moths and Butterflies of Great Britain and Ireland. Volume 1. Colchester: Harley Books. pp. 228–9. ISBN   0 946589 15 1.
  3. 1 2 3 Emmet, A M, ed. (1988). A Field Guide To The Smaller British Lepidoptera (Second ed.). London: British Entomological and Natural History Society. p. 24. ISBN   0 9502891 6 7.
  4. "4.035 Stigmella salicis (Stainton, 1854)". British leafminers. Retrieved 1 November 2018.
  5. 1 2 Ellis, W N. "Stigmella salicis (Stainton, 1854) sallow pigmy". Plant Parasites of Europe. Retrieved 1 November 2018.
  6. "Stigmella salicis (Stainton, 1854)". 2.6.2. Fauna Europaea . Retrieved 1 November 2018.