Leaf-miner: A corridor mine which meanders through the leaf frequently crossing
itself (British
leafminers).
Larva: The larvae of beetles have a head capsule and chewing mouthparts with opposable mandibles and lack abdominal legs (see examples).
Pupa: The pupae of beetles have visible head appendages, wings and legs which lie in sheaths (see examples).
Hosts in Great Britain and Ireland:
Hosts
elsewhere: Currently unknown.
Time
of year - larvae: Summer (British
leafminers).
Time
of year - adults: Currently unknown.
Distribution
in Great Britain and Ireland: C. insularis is a Red
Data Book species, which is unique to St Kilda within the British
Isles. Prior to its rediscovery in 2004, the only previously published
finding was from 1931. The weevil's food plant is common scurvy-grass
(Cochlearia officinalis), the only wild crucifer recorded
on St Kilda in the Outer Hebrides (British
leafminers).
A population regarded as a different variety of the
same species occurs on islands off the South coast of Iceland (British
leafminers).
C.
insularis is related to the Common cabbage leaf weevil, C.
contractus (= minutus), which is found on mainland Britain
and in Europe. It is similar to a variety of C. contractus,
which is found on Lundy Island in the Bristol Channel (British
leafminers).
Records
of C. insularis from Cumberland and North Devon cited in
the NBN
Atlas are in error.
Distribution
elsewhere: Not recorded (Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.
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