Chirosia betuleti: Difference between revisions
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{{Taxobox |
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| image = Chirosia betuleti female, Trawscoed, North Wales, April 2014 (17995445952).jpg |
| image = Chirosia betuleti female, Trawscoed, North Wales, April 2014 (17995445952).jpg |
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| image_caption = ''Chirosia betuleti'' female |
| image_caption = ''Chirosia betuleti'' female |
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| image2 = Chirosia betuleti, on Dryopteris dilitata, forming a Knotting gall.jpg |
| image2 = Chirosia betuleti, on Dryopteris dilitata, forming a Knotting gall.jpg |
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| image2_caption = Knotting gall on broad buckler fern |
| image2_caption = Knotting gall on broad buckler fern |
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| genus = Chirosia |
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| phylum = [[Arthropod]]a |
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| classis =[[Insect]]a |
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| ordo =[[Diptera]] |
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| familia = [[Anthomyiidae]] |
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| subfamilia = [[Anthomyiinae]] |
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| tribus = [[Chirosiini]] |
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| genus = ''[[Chirosia]]'' |
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| binomial = ''Chirosia betuleti'' |
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| synonyms = *''Hylemyia betuleti'' <small>[[Oscar Ringdahl|Ringdahl]], 1935</small> |
| synonyms = *''Hylemyia betuleti'' <small>[[Oscar Ringdahl|Ringdahl]], 1935</small> |
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*''Chirosia signata'' <small>(Brischke, 1888)</small> |
*''Chirosia signata'' <small>(Brischke, 1888)</small> |
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'''''Chirosia betuleti''''' is a species of [[fly]], which causes '''knotting gall''' in ferns. The [[gall]] develops in the terminal shoots of ferns, such as broad buckler fern (''[[Dryopteris dilatata]]''), male fern (''[[Dryopteris filix-mas]]''), lady fern (''[[Athyrium filix-femina]]''), and ostrich fern (''[[Matteuccia]] struthiopteris)''.<ref name="S23">Stubbs, F. B. Edit. (1986) ''Provisional Keys to British Plant Galls''. Pub. Brit Plant Gall Soc. {{ISBN|0-9511582-0-1}}., p. 80</ref><ref name="R315">Redfern, Margaret & Shirley, Peter (2002). ''British Plant Galls. Identification of galls on plants & fungi.'' AIDGAP. Shrewsbury : Field Studies Council. {{ISBN|1-85153-214-5}}, p. 288</ref><ref name="BioStor">[http://biostor.org/reference/56267 BioStor] Retrieved: 2011-07-28</ref> |
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==The physical appearance of the galls== |
==The physical appearance of the galls== |
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==Parasitoids== |
==Parasitoids== |
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[[Braconidae|Braconid]] wasps of the genus ''Aphaereta'' and [[Eulophidae|eulophid]] wasps of the genera ''[[Dimmockia]]'' and ''[[Elachertus]]'' have been identified as [[parasitoids]] of ''C. betuleti''.<ref name="BioStor"/> |
[[Braconidae|Braconid]] wasps of the genus ''Aphaereta'' and [[Eulophidae|eulophid]] wasps of the genera ''[[Dimmockia]]'' and ''[[Elachertus]]'' have been identified as [[parasitoids]] of ''C. betuleti''.<ref name="BioStor"/> |
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==See also== |
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* [[Fern sports]] |
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* [[Galls]] |
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==References== |
==References== |
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[[Category:Anthomyiidae]] |
[[Category:Anthomyiidae]] |
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[[Category:Diptera of Europe]] |
[[Category:Diptera of Europe]] |
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[[Category: |
[[Category:Gall-inducing insects]] |
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[[Category:Insects described in 1935]] |
[[Category:Insects described in 1935]] |
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[[Category:Taxa named by Oscar Ringdahl]] |
[[Category:Taxa named by Oscar Ringdahl]] |
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Revision as of 03:36, 11 May 2020
| Chirosia betuleti | |
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.jpg)
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| Chirosia betuleti female | |
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| Knotting gall on broad buckler fern | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Anthomyiidae |
| Genus: | Chirosia |
| Species: | C. betuleti
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| Binomial name | |
| Chirosia betuleti (Ringdahl, 1935)
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| Synonyms | |
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Chirosia betuleti is a species of fly, which causes knotting gall in ferns. The gall develops in the terminal shoots of ferns, such as broad buckler fern (Dryopteris dilatata), male fern (Dryopteris filix-mas), lady fern (Athyrium filix-femina), and ostrich fern (Matteuccia struthiopteris).[1][2][3]
The physical appearance of the galls
The fly larva mines the leaves and stems of the fern's frond at the apex. The tip of the frond rolls upwards into a loose, obvious knot or mop-head structure involving many pinnae; inside, a white larva mines along the rachis, eating the trichomes, causing it to coil. Usually, only one larva is present in the leaf tip, sometimes two. An elongated white egg shell is visible at the centre of the mass.[4]
Lifecycle
Eggs are laid in the unfurling fronds and the hatched larvae feed on the trichomes in the groove of the rachis, causing the frond to curl inwards. The pupae drop from the gall and remain from autumn and winter to emerge in the spring. Galling rates up to nine fronds in 13 on a single plant have been noted.[3]
Distribution
The knotting gall is found in Cornwall, Wiltshire, Worcester, Hants, Norfolk, Warwickshire, Berkshire, Cardiganshire, Cheshire, Denbighshire, East Norfolk, Suffolk, Easterness, Elgin, Flintshire, North Ayrshire, Herefordshire, Merionethshire, Perth, Yorkshire, Montgomeryshire, Lincolnshire, Somerset, Oxfordshire, Shropshire, Devon, Hampshire, Yorkshire, Stafford, Surrey, Gloucestershire, Kent, Suffolk, and Worcestershire.[4]
As shown, the knotting gall has been recorded throughout the United Kingdom, in the Netherlands, the Czech Republic, Denmark, Finland, France, Germany, Italy, Norway, Poland, Russia – north and north-west, Slovakia, Spain, and Sweden.[4]
Parasitoids
Braconid wasps of the genus Aphaereta and eulophid wasps of the genera Dimmockia and Elachertus have been identified as parasitoids of C. betuleti.[3]
References
- ^ Stubbs, F. B. Edit. (1986) Provisional Keys to British Plant Galls. Pub. Brit Plant Gall Soc. ISBN 0-9511582-0-1., p. 80
- ^ Redfern, Margaret & Shirley, Peter (2002). British Plant Galls. Identification of galls on plants & fungi. AIDGAP. Shrewsbury : Field Studies Council. ISBN 1-85153-214-5, p. 288
- ^ a b c BioStor Retrieved: 2011-07-28
- ^ a b c Leaf and Stem Mines Archived 2011-10-08 at the Wayback Machine Retrieved : 2011-07-28
Further reading
- Darlington, Arnold (1968). The Pocket Encyclopaedia of Plant Galls in colour. Pub. Blandford Press. Dorset. ISBN 0-7137-0748-8
- Hancy, Rex (2000). The Study of Plant Galls in Norfolk. The Norfolk and Norwich Naturalist's Society.
