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Essex Field Club
Essex Field Club
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Species Account for Dioxyna bidentis

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Dioxyna bidentis  (Robineau-Desvoidy, 1830)
Diptera: other groups: Tephritidae

Dioxyna bidentis

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National status: Scarce
Essex RDB: Listed

Additional Phenology Data


Dioxyna bidentis
Dioxyna bidentis

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Taxonomic group: flies (other) (Diptera: other groups) - County data   
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Species text
This picture-winged fly is a local species whose larvae feed on the flower heads and unripe seeds of the local Tripartite Bur-marigold Bidens tripartita, although it has been collected in areas where Bidens does not occur. Records are widely dispersed in England as far north as Yorkshire and with an old record from Kinrara, Speyside, Scotland (1936), but there are nine post 1960 sites known to Falk (1991a). Habitat preferences are unclear, but records include marshes and wet areas on commons and dunes. Threats include loss of the host plant through either overgrazing, or cessation of grazing with subsequent scrub invasion. Bidens species appear to require ground which is flooded in the winter, but not in the summer, (Falk, op. cit.) so it is essential that water levels facilitate this. References

Species text last edited on Tue Mar 20th 2007 by user 3


Broad Habitat Data (based on 22 records with habitat information)

no subhabitat data available

Structural Habitat Data (based on 9 records with structural habitat information)

Habitat Detail and Method (based on 13 records with habitat detail and method information)

Recorded management for locations with Dioxyna bidentis

Recorded substrate and hydrology for locations with Dioxyna bidentis

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