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(Coleoptera, Diptera, Hymenoptera and Lepidoptera)
by
Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds
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COTONEASTER.
Cotoneasters. [Rosaceae]
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Ninety-four
species and subspecies of Cotoneaster are recorded in Britain.
These include the native Wild Cotoneaster (C. cambricus). The BSBI provide a downloadable plant crib for Cotoneaster.
Twenty-seven British miners are recorded on Cotoneaster.
A key to the European miners recorded on Cotoneaster is provided in Bladmineerders van Europa.
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Cotoneaster
Cotoneaster sp. |
Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Cotoneaster
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1a > Leaf-miner and case-bearer: The larva lives outside the mine, protected by a case, and feeds on the underlying plant tissues via a hole cut in the epidermis. From that point it eats away as much leaf tissue as it can reach without fully entering the mine. Mine does not contain frass (Coleophora species) |
2 |
1b > Leaf-miner, but not a case-bearer: The larva lives mainly inside the mine. Mine usually contains frass. In later instars the larva may live sandwiched between two more or less circular sections cut from the leaf. |
3 |
2a > Leaf-miner
and case-bearer: The larva initially makes a blotch mine in the leaf, which it then
excises to form its case. The larva overwinters in its case before
resuming feeding in spring. A new case, 6-7 mm long, is then constructed
from a further blotch mine.
The
second case is indistinguishable from C.
spinella and C.prunifoliae.
The
final case is a tubular leaf case, 6-7 mm long, light brown at first,
darker later. The rear end is trivalved, the mouth opening is around
45°. The larvae live at the underside of the leaves, and make
sizable full depth mines. |
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On Crataegus, Malus and Prunus, but not yet on Cotoneaster, in Britain and Cotoneaster, Crataegus,
Malus, Prunus and Sorbus elsewhere. Scattered colonies
throughout the UK. Widespread in continental Europe.
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Coleophora
coracipennella (Hübner, 1796) [Lepidoptera: Coleophoridae]. |
2b > Leaf-miner
and case-bearer: The species spends two years as a larva, the first one-and-a-half
years in a small pistol-case, and in the second spring building
a long straight case which is dark brown and rather distinctive.
The
lava lives from autumn until summer next year. In autumn a composite
leaf case is made, shaped like the handle of a walking stick. Early
in the following spring a tubular leaf case is made that in the
end is rather large (10 mm) and is positioned vertically on the
leaf; mouth angle 90°. |
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On Cotoneaster, Crataegus, Malus, Prunus, Pyrus and Sorbus in Britain and Amelanchier, Chaenomeles, Cotoneaster, Crataegus,
Cydonia, Malus, Prunus, Pyrus, Sorbus and Spiraea elsewhere.
Occurs locally in the south east of England and the Channel Is.
Widespread in continental Europe.
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Coleophora
hemerobiella (Scopoli, 1763) [Lepidoptera: Coleophoridae]. |
2c > Leaf-miner
and case-bearer: Tubular leaf case, 6-7 mm long, light, later dark brown, trivalved,
with a mouth angle of 45°. The larva lives at the underside
of the leaf, and makes sizable full depth mines there. |
On Malus and Prunus, but not yet on Cotoneaster,
in Britain and Cotoneaster, Crataegus, Cydonia, Malus, Prunus,
Pyracantha and Sorbus elsewhere. Southern England.
Widespread in continental Europe.
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Coleophora
prunifoliae Doets, 1944 [Lepidoptera: Coleophoridae]. |
2d > Leaf-miner
and case-bearer: The larva feeds by inserting its head into small mines it creates
on the leaves of birch, elm, alder, or hazel. Occasionally it is
found feeding on other trees, or on herbaceous plants onto which
it has accidentally Fallén. It forms two cases during its larval
life. The first case is initially curved, smooth, laterally compressed
with a bivalved anal opening, and about 2 mm long in September.
During October it feeds, and adds a few rough collars of larval
material around the oral opening. After hibernation, it feeds again
in April and early May, adding more protruding collars until they
equal or exceed the original smooth part of the case. At the same
time, it expands the case girth by the creation of a silk gusset
ventrally. The second case, 6 or 7 mm long, is formed in May, leaving
the vacated first case attached to its last feeding mine. The new
case is tubular with a trivalved crimp at the anal opening. The
dorsum is formed from the edge of the leaf from which the case was
cut. This results in a more or less serrated dorsal keel, depending
on the plant species and the individual piece of leaf used. Considerable
variation in the degree of serration can be found, even among specimens
off the same tree. The case colour varies with food plant, from
yellowish brown on birch, darkening through elm and hazel to dark
brown on alder.
The
strongly curved young case is is a composite leaf case, the adult
case is a tubular leaf case. The adult case is bivalved, about 7
mm in length; the mouth angle is around 30°. The case is straw
coloured and almost always has a toothed dorsal keel (remnant of
the margin of the leaf from which the case was cut). Neither larvae
or cases of C.
coracipennella, prunifoliae, serratella and spinella can be
separated; from serratella. |
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On Alnus, Betula, Corylus, Ulmus and Sorbus, but not yet on Cotoneaster, in Britain plus Carpinus,
Mespilus, Ostrya, Hippophae, Ribes, Myrica, Forsythia, Amelanchier,
Chaenomeles, Cotoneaster, Crataegus, Cydonia, Eriobotrya, Malus,
Prunus, Sorbus,
Spiraea, Populus and Salix elsewhere. This is probably the commonest species of British
coleophorid, and is found throughout the British Isles. Widespread
in continental Europe.
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Coleophora
serratella (Linnaeus, 1761) [Lepidoptera: Coleophoridae]. |
2e > Leaf-miner
and case-bearer: Larva in autumn forming a few small mines.
Feeding restarts in the same case in spring before changing to a
new case by late April. In spring the cases or mines cannot be reliably
separated from those of C.
coracipennella or C.
prunifoliae.
The
larva lives two years. In the first year, in autumn, a composite
leaf case is made that resembles a boomerang: front and rear end
stand at almost right angles. In its second year the larva makes
a trivalved tubular leaf case of about 6 mm, with a mouth angle
of c. 45°; the case tapers somewhat to both ends. |
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On Cotoneaster, Crataegus, Malus, Prunus, Pyrus and Sorbus in Britain plus Mespilus elsewhere. Widespread in England
and continental Europe. Also recorded in the Republic of Ireland.
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Coleophora
spinella (Schrank, 1802) [Lepidoptera: Coleophoridae]. |
2f > Leaf-miner
and case-bearer: Tubular silken case of only 5-6 mm. The case
is weakly constricted near the anal end, and strongly just behind
the mouth. The case is sharply bent there; therefore the mouth angle
is 0° and the case lies adpressed to the leaf. The fully developed
case normally is trivalved. Larvae at the underside of the leaf. |
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On Crataegus, Malus, Prunus and Sorbus, but not yet on Cotoneaster, in Britain plus Cotoneaster elsewhere. Widespread in England and continental Europe.
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Coleophora
trigeminella Fuchs, 1881 [Lepidoptera:
Coleophoridae]. |
3a > Leaf-miner: The
larvae initially mining the leaves in a short, contorted gallery.
As the larva develops it leaves the mine to feed externally, creating
windows on the upperside of the leaves.
Oviposition at the leaf upperside, egg shell iridescent. Small,
hook-like corridor, mostly in a vein axil. Frass in a very thick
central line. The larva soon leaves the mine through an untidy hole
and subsequenty feeds living freely on the leaf. Pupation occurs in a ribbed white cocoon spun on debris. The
winter is passed in this stage.. |
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On Crataegus, Malus, Pyrus and Sorbus, but not
yet on Cotoneaster, in Britain and Amelanchier,
Chaenomeles, Cotoneaster, Crataegus, Cydonia, Malus, Mespilus,
Prunus, Pyracantha, Pyrus and Sorbus elsewhere. Widespread
throughout England and southern Scotland. Also recorded in the
Republic of Ireland. Widespread in continental Europe.
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Bucculatrix
bechsteinella (Bechstein & Scharfenberg, 1805) [Lepidoptera:
Bucculatricidae]. |
3b > Leaf-miner: The young larvae mine the leaves, causing a gallery followed by
a semi-translucent blotch on the upper surface of the leaf. It then
vacates this and folds the edge of a leaf down to feed within, usually
twice, before pupating externally among detritus.
The
mine begins as an inconspicuous epidermal corridor, mainly recognisable
by its reddish brown frass line. In the next instar a blotch is
formed. The mine not starting over a vein, rather lies between two
veins. The colour initially is silvery, but soon the mine gets a
characteristic onrange-brown tinge. Usually, but by no means invariably,
the mine is upper-surface; lower-surface mines keep their original
silvery colour. Silk is deposited witihin the mine, but in little
quantities and the mine contracts only lightly. The mine hardly
contains any frass. After some time the larva leaves the mine and
then lives free in a leaf margin that has been folded downwards
and fixed with silk. Two such folds are usually made, and eaten
out to the upper epidermis. |
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On Malus in
Britain and Cotoneaster, Crataegus, Malus and Pyrus elsewhere. Widespread in England, Wales and continental Europe.
Also recorded in the Republic of Ireland.
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Callisto
denticulella (Thunberg, 1794) [Lepidoptera: Gracillariidae]. |
3c > Leaf-miner: A circular or oval brownish blotch with a central spiral of dense
blackish frass (British
leafminers), sometimes several mines in one leaf.
Oviposition
is at the leaf underside, well away from the leaf margin; the egg
has a fine reticulate surface. The mine is a rather large, perfectly
circular blotch without a trace of a preceding corridor. Around
the dark centre the frass, glued to the upper epidermis is arranged
in distinct arcs. Pupation in
a silken cocoon, usually on detritus. Pupation in
a silken cocoon, usually on detritus. |
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On Betula, Cotoneaster, Crataegus, Cydonia, Malus, Prunus, Pyrus,
Rosa and Sorbus in Britain and on Alnus, Betula,
Amelanchier, Aronia, Chaenomeles, Cotoneaster, Crataegus, Cydonia,
Malus, Mespilus, Prunus, Pyrus and Sorbus elsewhere.
Widespread in England and into Southern Scotland. Also recorded
in the Republic of Ireland. Widespread in continental Europe.
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Leucoptera
malifoliella (O. Costa, 1836) [Lepidoptera: Lyonetidae]. |
3d > Leaf-miner: A long, whitish smoothly-curved upper-surface mine with broken black
frass.
Oviposition
is by means of an ovipositor; what remains is a small scar: no egg
shell is visible at the start of the mine. From here a long, sometimes
very long, slender, full depth corridor winds throught the leaf,
not steered by leaf margin or the leaf venation. The midrib is crossed
effortless; the corridor frequently also crosses
itself; the section of the leaf cut off then usally turns brown
and dies off. Frass in a narrow central line. The larva vacates
the mine prior to pupation through an exit in the upper epidermis.
The vacated larval chamber is proportionally much
longer than in the case of Stigmella mines ( > 3 x longer
than broad). Pupation in a silken cocoon suspended from threads attached to food plant
or other vegetation. |
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Polyphagous. On numerous genera and species in several plant families, including Cotoneaster, in Britain and elsewhere. Widespread in Britain
and continental Europe. Also recorded in the Republic of Ireland.
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Lyonetia
clerkella (Linnaeus, 1758) [Lepidoptera: Lyonetidae]. |
3e > Leaf-miner: The larva mines the leaves of various roseaceous trees, such as
blackthorn and apple, forming a gallery leading to a blotch.
Eggs
are deposited in the underside of a leaf, well away from the margin,
often several per leaf. Around the oviposition site a cavity develops
that in the end often leaves a hole in the leaf. Then a narrow,
hardly widening, winding corridor, largely filled with a broad reddish
brown frass line. The corridor abruptly widens into a wide, full
depth blotch, that often lies against the leaf margin. The larva
may leave its mine and continue elsewere, even on a different leaf.
Note that the first blotch may already lie on a different leaf.
Frass dispersed, in oval granules. Most frass is ejected through
semicircular cuts along the outer limit of the blotch; part of it
is often trapped in strands of silk under the leaf. The pupal cocoon is suspended from silken 'guy ropes' and closely
resembles that of L.
clerkella. |
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On Betula, Chaenomeles, Crataegus, Cydonia, Malus, Prunus and Sorbus, but not yet on Cotoneaster,
in Britain and Betula, Chaenomeles, Cotonneaster, Crataegus,
Cydonia, Malus, Mespilus, Prunus, Pyrus and Sorbus elsewhere. Formerly locally resident in parts of southern and
central England, this moth seems to have died out as a British
species and has not been reliably encountered since around 1900.
Widespread in continental Europe.
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Lyonetia
prunifoliella (Hübner, 1796) [Lepidoptera: Lyonetiidae]. |
3f > Leaf-miner: Before overwintering larvae make a small, full depth blotch (Robbins, 1991a). After hibernation, they live freely under a silk.
Larvae mine in late autumn (Agassiz, 1996a). Not rare, in Belgium (De Prins, 1998a). |
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On Crataegus, Cotoneaster, Rosa and Sorbus in Britain
and Crataegus, Cotoneaster and Sorbus elsewhere.
Widespread in Britain, except the far north. Also recorded in
the Republic of Ireland. Widespread in continental Europe.
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Paraswammerdamia
nebulella (Goeze, 1783) [Lepidoptera: Yponomeutidae]. |
3h > Leaf-miner: In a small Phyllonorycter-like mine initially, but with brown
rather than green lower epidermis. Later in two or more successive
cones formed by folding leaf-lobes downwards.
The
mine begins at a flat, iridescent egg shell. It starts as an epidermal
corridor, widening into (and mostly over run by) a shallow lower
surface blotch in the tip of a leaf segment. The lower epidermis
is off-grey with small light brown spots at first, but soon turns
brown. Silk is deposited within the mine, causing it to contract.
This wrinkles the lower epidermis, but there are no clear folds
formed. Soon the larva starts consuming the palissade parenchyma,
and the upperside of the mine than turns brown as well. Frass in
loose grains. After some time the larva leaves its mine and continues
living free under a downfolded leaf segment, kept in place by some
spinning. Here too the leaf tissue is consumed up to the palissade
parenchyma, browning the leaf. |
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On Crataegus, Fragaria and Sorbus, but not yet on Cotoneaster, in Britain and Amelanchier, Cotoneaster,
Crataegus, X Crataemespilus, Fragaria, Mespilus and Sorbus elsewhere. Widespread in Britain, Ireland and continental Europe.
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Parornix
anglicella (Stainton, 1850) [Lepidoptera: Gracillariidae]. |
3i > Leaf-miner: Early mine a blotch with lower and upper epidermis turning brown.
Then either a fold at the leaf edge, or a mine resembling that of
a Phyllonorycter, but formed by a silken pad on the underside.
The
mine begins with a lower-surface epidermal corridor, but soon the
larva starts feeding on the sponge parenchyma. The mine then becomes
a flat lower-surface blotch. Silk, deposited in the mine causes
the lower epidermis to pucker ligtly. The lower (later also the
upper) epidermis of the mine is greyish brown to brown. After leaving
the mine the larva lives freely under a folded leaf margin, or in
a fold at the underside of the leaf, in its centre, that is covered
with silk.
Larva greenish white; head light brown with a pair of brown spots. The full grown larva is remarkably slender, hyaline, with a large roundish black spot on the pronotum. The instar just before pupations lacks this spot. Larva and pupa are described by Lüders (1900a) and Grandi (1931a, 1933a). |
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On Malus and Sorbus, but not yet on Cotoneaster,
in Britain and Cotoneaster, Malus and Sorbus elsewhere.
Widespread in Britain, Ireland and continental Europe.
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Parornix
scoticella (Stainton, 1850) [Lepidoptera: Gracillariidae]. |
3j > Leaf-miner: The mine is in the upper epidermis of a leaf, usually over midrib
or vein. The mine is at first silvery, later with brown speckling.
Silvery,
upper-surface, epidermal tentiform mine, centered over the midrib
or a heavy lateral vein. Unlike P.
leucographella, with which this species shares some host
plants, the upper epidermis looks dirty by the presence of numerous
fine black-brown specks of frass. The epidermis remains without
folds until the mine becomes strongly contrated. Young mines look
like a streak of silver on top of a vein. |
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On Betula, Crataegus, Malus, Pyrus and Sorbus, but not yet on Cotoneaster, in Britain and Betula,
Fagus, Amelanchier, Chaenomeles, Cotoneaster, Crataegus, Cydonia,
Malus, Mespilus, Prunus, Pyrus, Sorbus and Spiraea elsewhere.
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Phyllonorycter
corylifoliella (Hübner, 1796) [Lepidoptera: Gracillariidae]. |
3k > Leaf-miner: The mine is upper side and silvery, over the midrib. Leaf later
may fold upwards, concealing the mine.
Oviposition
is on the base of the midrib. From there an epidermal corridor is
made, running towards the leaf tip. The corridor then is widened
into an epidermal, silvery blotch, finally into a longitudinally
contracted tentiform mine. Frass in fine, shining grains, mostly
in a line over the midrib, rarely in a mass in a corner of the mine.
The epidermis of the mine has a number of yellow spots, but never
the black specks that are apparent in P.
corylifoliella. |
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Polyphagous. On Cotoneaster, Crataegus, Fagus, Laburnum, Malus, Pyracantha, Pyrus and Sorbus in Britain and additionally Chaenomeles, elsewhere.
Widespread in England, southern Scotland and continental Europe.
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Phyllonorycter
leucographella (Zeller, 1850) [Lepidoptera: Gracillariidae]. |
3l > Leaf-miner: Lower-surfce,
yellow-green tentiform mine, 20-32 mm long, with a number of fine
folds in the lower epidermis. In most cases the mine is elongate,
situated between two lateral veins. The reddish to chestnut brown
pupa lies in a flimsy cocoon in which no frass is incorporated:
the frass is stored not in a clump but in a row of loose grains
behind the cocoon. Just before edcysis the pupa works itself out
of the mine through the lower wall; mostly the empty exuvium sticks
halfway out of the mine.
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Mine of Phyllonorycter mespilella on Sorbus
Image: © Martin Gray (British leafminers)
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On Pyrus and Sorbus, but not yet on Cotoneaster,
in Britain and Amelanchier, Cotoneaster, Cydonia, Malus, Mespilus,
Prunus and Sorbus elsehwere. Recorded in East Kent,
Hereford, Hunts, Surrey and Worcester in Britain. Also recorded
in the Republic of Ireland. Widespread in continental Europe
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Phyllonorycter
mespilella (Hübner, 1805) [
Lepidoptera:
Gracillariidae]. |
3m > Leaf-miner: A large mine with a strong crease in lower epidermis. Leaf-edge
often folded downwards.
Lower-surface,
yellow-green tentiform mine with a few sharp folds in the epidermis.
In Rowan the mine is parallel to the leaf margin, in Cherry usually
between two lateral veins. The light brown cocoon lies in a wide
cocoon, in which no frass is incorporated; all frass is accumulated
in a clump in an angle of the mine. Before hatching the pupa penetrates
the mine wall; generally the exuvium remains stuck halfway out of
the mine. |
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Phyllonorycter sorbi pupa, cremaster, dorsal
Image: © Willem Ellis (Bladmineerders van Europa) |
On Chaenomeles, Prunus and Sorbus, but not yet on Cotoneaster,
in Britain and Cotoneaster, Crataegus, Cydonia, Malus, Prunus,
Pyrus and Sorbus. Widespread in Britain, Ireland and
continental Europe.
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Phyllonorycter
sorbi (Frey, 1885) [Lepidoptera: Gracillariidae]. |
3n > Leaf-miner: The young larva mines the leaves of its foodplant then hibernates.
It will then mines leaves or flowerbuds, then blossom or leaves.
Branched,
sometimes stellate, brownish, very transparent, sometimes long corridor
that contains no frass. All frass is ejected through a number of
tiny openings that generally are close to a vein. Only the young
larvae are miners. |
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On Malus, Prunus and Pyrus, but not yet on Cotoneaster,
in Britain and Amelanchier, Chaenomeles, Cotoneaster, Crataegus,
Cydonia, Malus, Prunus, Pyrus and Sorbus elsewhere.
Now and then the species is recorded from Corylus avellana,
Rhamnus and Betula. Recorded in England, from York southwards.
Widespread in continental Europe.
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Recurvaria
nanella (Denis & Schiffermüller, 1775) [Lepidoptera:
Gelechiidae]. |
3o > Leaf-miner: Usually a very small (but see below), pear-shaped, upper-surface
blotch, most of it stuffed with reddish brown frass. Often several
mines in a leaf. Ovipisition is already in May, but the larvae hatch
late and initially develop very slowly; only against the end of
summer the mines become apparent. The larvae remain in the mine and hibernate in the fallen leaves. The bright-coloured frass and
their large number makes these mines very conspicuous in autumn,
despite their small size. The weevils feed pinhole-sized windows
in the leaf upperside (maturation feeding). |

Minee of Rhamphus oxyacanthae on Crataegus monogyna
Image: © Willem Ellis (Bladmineerders van Europa) |

Rhamphus oxyacanthae larva, dorsal
Image: © Willem Ellis (Bladmineerders van Europa) |
On Crataegus, Prunus, Mespilus and Sorbus, but not yet on Amelanchier, Malus or Pyrus, in Britain and Amelanchier, Chaenomeles, Crataegus, Cydonia,
Malus, Mespilus, Prunus, Pyrus and Sorbus elsewhere.
Widespread in England and continental Europe.
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Rhamphus
oxyacanthae (Marsham, 1802) [Coleoptera: Curculionidae]. |
3p > Leaf-mine: The young larvae make very small (≤ 3 mm) corridor or blotch mines, usually several in a leaf. The primary mine generally lies adjacent to the midrib; as far as I have seen the egg always is upper-surface. The secondary mines often are found in leaves without primary mine: obviously the larvae easily move to another leaf. The secondary mines are made from the underside of the leaf; while moving around silk is deposited under the leaf. Most frass is ejected from the mines, and part of the frass grains remain stuck in the spinning. Rather soon the larvae start living completely free in a common spinning under a leaf. They hibernate in a hibernaculum and continue living free in the spring. |

Mines of Scythropia crataegella on Crataegus
Image: Ben Smart |
On Cotoneaster, Crataegus, Malus and Prunus in Britain and on Cotoneaster, Crataegus, Malus, Prunus and Pyrus elsewhere. Fairly common in the southern half of Britain.. Widespread in continental Europe.
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Scythropia crataegella (Linnaeus, 1767) [Lepidoptera: Yponomeutidae]. |
3q > Leaf-miner: The frass linear in early gallery, widening to blotch with dispersed
frass.
Oviposition
at random point of the leaf, either at upper- or lower-surface.
First a quite slender corridor is made, with a relatively broad,
continuous, frass line, that always leaves a clear margin at either
side; the corridor winds freely through the leaf. This initial corridor
often abruptly changes in direction, widens into a blotch that mostly
lie along the leaf margin. Pupation outside the mine. |
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On Crataegus, but not yet on Cotoneaster,
in Britain and Hippophae, Amelanchier, Cotoneaster, Crataegus,
Pyracantha and Sorbus elsewhere. Widespread in Britain.
Also recorded in the Republic of Ireland. Widespread in continental
Europe.
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Stigmella
hybnerella (Hübner, 1813) [Lepidoptera: Nepticulidae]. |
3r > Leaf-miner: A long thin linear gallery with frass in a thin line, sometimes
broken. This distinguishes it form S.nylandriella,
which never has linear frass throughout the mine. The gallery of S.magadalenae is also narrower than S.nylandriella. S. magdalenae can both be an edge miner or make a small mine
in the leaf blade, or run along a vein.
Egg
at the underside of the leaf, independent of the venation. The corridor
is narrow from start to end, and compressed on a small space, sometimes
following the leaf margin for a while, more often along a major
vein. Frass in a narrow, regularly interrupted central line. In
thick leaves the frass line is broader, and the corridor is shorter. |
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On Sorbus, but not yet on Cotoneaster, in
Britain and Amelanchier, Cotoneaster, Malus and Sorbus.
Widespread in England, Wales, Scotland and Northern Ireland.
Also
recorded in the Republic of Ireland. Widespread in continental
Europe.
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Stigmella
magdalenae (Klimesch, 1950) [Lepidoptera: Nepticulidae]. |
3s> Leaf-miner: Rather short, full depth, gradually widening corridor, the last
section suddenly widenened still a bit more into an elongated blotch.
Frass in a central line, about 1/3 of the width of the corridor.
Pupation outside the mine. |

Mine of Stigmella mespilicola on Sorbus torminalis
Image: © Guy Meredith (British leafminers)
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On Sorbus, but not yet on Cotoneaster, in
Britain and Amelanchier, Cotoneaster and Sorbus elsewhere. Widespread in Britain and in continental Europe.
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Stigmella
mespilicola (Frey, 1856) [Lepidoptera: Nepticulidae]. |
3t > Leaf-miner: The reddish frass is linear, later in arcs, finally dispersed.
Long
corridor, that widens only little, and winds freely through the
leaf, not influenced by the venation. In thick, sun-exposed leaves
the mine may be much shorter, especially in Cotoneaster, Malus and Pyrus. Frass brown, in arcs.. |
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On Cotoneaster, Crataegus, Malus, Pyrus and Sorbus in Britain and Amelanchier, ? Chaenomeles, Cotoneaster,
Crataemespilus, Crataegus, Crataemespilus, Cydonia, Malus, Mespilus,
Prunus, Pyrus and Sorbus elsewhere. Widespread in Britain.
Also recorded in the Republic of Ireland. Widespread in continental
Europe.
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Stigmella
oxyacanthella (Stainton, 1854) [Lepidoptera: Nepticulidae]. |
3u > Leaf-miner: A narrow gallery leads abruptly to large blotch.
Oviposition
on the leaf underside. The mine begins as a very slender winding
corridor of 15-20 mm, the second part of which is almost stuffed
with frass. The corridor abruptly widens into a blotch with dispersed
frass; in large leaves this blotch is almost circular. Mostly the
midrib is not crossed, but the mine can occupy the major part of
a leaflet. Often several mines in leaf. |
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On Sorbus but not yet on Cotoneaster, in
Britain and Amelanchier, Cotoneaster, Malus and Sorbus elsewhere. Widespread in Britain. Also recorded in the Republic
of Ireland. Widespread in continental Europe.
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Stigmella
sorbi (Stainton, 1861) [Lepidoptera: Nepticulidae]. |
3v > Leaf miner. The egg is deposited in the base of the midrib. After oviposition the female severes the petiole, causing the petiole to break. The leaf start to wilt and falls, but still remains green for a considerable time. The larva tunnels in the midrib, and makes from there broad, full deep blotches in the lamina. Frass dispersed in the mine. Often several larvae in a leaf. Pupation in the ground. Blommers & Vaal (2002a) and Gønget (2003a) describe the biology in more detail.. |
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On Crataegus, Mespilus and Prunus, but not yet on Cotoneaster, in Britain and Amelanchier, Cotoneaster, Crataegus, Cydonia, Malus, Prunus and Pyrus elsewhere. Recorded in several counties in southern Britain and widespread in continental Europe.
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Neocoenorrhinus pauxillus (Germar, 1824) [Coleoptera: Rhynchitidae] |
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