The leaf and stem mines of British flies and other insects
 

(Coleoptera, Diptera, Hymenoptera and Lepidoptera)

by Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds

Join us on Facebook

Stigmella dryadella (O. Hofmann, 1868)
[Lepidoptera: Nepticulidae]

Mountain-avens Pigmy


Nepticula dryadella O. Hofmann, 1868. Stett. ent. Ztg.: 29.
Stigmella dryadella
(O. Hofmann, 1868).


Leaf-miner: Egg on the leaf margin or the underside of the leaf. The mine is a corridor, narrow at first, for about 10 mm descending towards the base of the leaf, meticulously following the leaf margin. Then the corridor reverses its direction, and widens into a blotch that may occupy half of the leaf, to the midrib. Frass in the corridor as a broad central ribbon; broadly scattered in the blotch (Bladmineerders van Europa).

The mine, filled with black frass, follows the leaf margin for about 1cm then abruptly turns and forms a blotch, which occupies half the leaf (British leafminers).

Larva: The larvae of moths have a head capsule and chewing mouthparts with opposable mandibles (see video of a gracillarid larva feeding), six thoracic legs and abdominal legs (see examples).

Yellow, head dark brown (Emmet, 1983a) (Bladmineerders van Europa).

Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).

Adult: The adult is not illustrated in UKMoths (check for update). The male genitalia, but not the female genitalia (check for update), are not illustrated by the Lepidoptera Dissection Group.

Hosts in Great Britain & Ireland:

Rosaceae        
Dryas octopetala Mountain Avens British Wild Flowers by John Somerville et al. Pitkin & Plant

Hosts elsewhere:

Rosaceae        
Dryas octopetala Mountain Avens British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - larvae: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Britain including North Ebudes (NBN Atlas). The only known host has a northern distribution. See also British leafminers distribution map.

Distribution elsewhere: Widespread in continental Europe including Austria, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, Estonia, French mainland, Germany, Hungary, Italian mainland, Lithuania, Republic of Moldova, Poland, Romania, Slovakia, Slovenia, Switzerland and Ukraine (Karsholt and van Nieukerken in Fauna Europaea).

NBN Atlas links to known host species:

Dryas octopetala

British and Irish Parasitoids in Britain and elsewhere:

Ichneumonoidea  
Adelius subfasciatus Haliday, 1833 Braconidae: Cheloninae
Gelis nigritulus (Zetterstedt, 1838) Ichneumonidae: Cryptinae


External links: Search the internet:
Belgian Lepidoptera
Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea
NBN Atlas
NHM UK Checklist
UKMoths
Find using Google
Find using Google Scholar
Find images using Google


XHTML Validator
Last updated 10-May-2017  Brian Pitkin Top of page