Dasineura fraxini

Dasineura fraxini
	Galls on Fraxinus excelsior
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Diptera
Family:	Cecidomyiidae
Genus:	Dasineura
Species:	D. fraxini
Binomial name
	Dasineura fraxini; Bremi, 1847
Synonyms
	Cecidomyia fraxini Bremi, 1847; Perrisia fraxini Kieffer, 1897

Dasineura fraxini is a gall midge which forms galls on the leaves and petioles of ash (Fraxinus species). It was first described by Johann Jacob Bremi-Wolf in 1847.

Appearance of the gall

Most of the gall is on the underside of the main vein, where it forms a narrow green pouch. There can be several on a leaf, ranging in size from 5 mm to 30 mm, although they can coalesce. Each contains an orange larva. There is a slit-like opening on the upperside of the leaf. The galls can be found from June to October and can also be found on the petiole and rachis.[1][2] It is found on Fraxinus angustifolia & subsp., F. excelsior, F. ornus and F. oxycarpa.[3]

Inquiline

The larvae of Clinodiplosis botularia are reddish-yellow, grow faster and outcompete the gall maker, which perish.[4]

Distribution

The insect is found in Europe.[5]

References

Redfern, Margaret; Shirley, Peter; Bloxham, Michael (2011). British Plant Galls (Second ed.). Shrewsbury: FSC Publications. pp. 118 & 427. ISBN 978 1 85153 284 1.
Chinery, Michael (2011). Britain's Plant Galls. Old Basing, Hampshire: WildGuides Ltd. p. 33. ISBN 978 190365743 0.
Ellis, W N. "Dasineura fraxini (Bremi, 1847) on Fraxinus". Plant Parasites of Europe. Retrieved 17 September 2023.
Ellis, W N. "Clinodiplosis botularia (Winnertz, 1853) on Fraxinus". Plant Parasites of Europe. Retrieved 17 September 2023.
"Dasineura fraxini (Bremi, 1847)". Fauna Europaea. Retrieved 17 September 2023.

Galls in the petioles of Fraxinus excelsior

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[1] Redfern, Margaret; Shirley, Peter; Bloxham, Michael (2011). British Plant Galls (Second ed.). Shrewsbury: FSC Publications. pp. 118 & 427. ISBN 978 1 85153 284 1.

[2] Chinery, Michael (2011). Britain's Plant Galls. Old Basing, Hampshire: WildGuides Ltd. p. 33. ISBN 978 190365743 0.

[3] Ellis, W N. "Dasineura fraxini (Bremi, 1847) on Fraxinus". Plant Parasites of Europe. Retrieved 17 September 2023.

[4] Ellis, W N. "Clinodiplosis botularia (Winnertz, 1853) on Fraxinus". Plant Parasites of Europe. Retrieved 17 September 2023.

[5] "Dasineura fraxini (Bremi, 1847)". Fauna Europaea. Retrieved 17 September 2023.