Part 2: Nematocera and Aschiza not dealt with by Falk (1991) - JNCC

ALLODIA NEGLECTA
A fungus gnat LOWER RISK (Nationally Scarce)
Order DIPTERA
Family MYCETOPHILIDAE
Allodia neglecta Edwards, 1925
Identification This was described and the male genitalia
figured by Edwards (1925).
Distribution Recorded widely in England but relatively few
Welsh and Scottish records: Kent, Surrey, Hertfordshire,
Oxfordshire, Norfolk, Cambridgeshire, Huntingdonshire,
Northamptonshire, Herefordshire, Yorkshire; Cardiganshire;
Perthshire, Elgin, Easterness and East Sutherland.
Habitat Woodland, chiefly broad-leaved although possibly
mixed at some Scottish sites; damp woodlands with streams
are particularly favoured.
Ecology This has been reared in eastern Europe from
Ascomycetes of the genera Ptychoverpa and Gyromitra and
from the lignicolous agaric Kuehneromyces mutabilis.
Adults recorded from April to September.
Status Widespread but very local with only four earlier but
21 post 1960 sites.
Threats Clearance of woodland for agriculture or intensive
forestry; drainage of marshy areas or disturbance of
woodland streams. Removal of any dead wood, especially
in damp shaded situations, which could support suitable
fungi.
Management and conservation Maintain woodlands in a
natural state with marshy areas, streams where present left
undisturbed and any dead wood retained, especially in damp
shaded situations.
Published sources Chandler (1987); Cole & Chandler
(1979); Edwards (1925); Kidd & Ackland (1970); Perry &
Langton (2000).
ALLODIA PROTENTA
A fungus gnat LOWER RISK (Near Threatened)
Order DIPTERA
Family MYCETOPHILIDAE
Allodia protenta Laštovka & Matile, 1974
Identification This was described by Laštovka & Matile
(1974), who figured the male genitalia.
Distribution Only known as British from samples found by
trapping on wetlands during the NCC wetland surveys, in
1988: Suffolk (Walberswick); Norfolk (Brancaster, Middle
Harling, Foulden Common, Old Buckenham Fen, Scarning,
Wendling, Banham Great Fen, Strumpshaw);
Cambridgeshire (Chippenham Fen NNR); Anglesey (Cors
Bodeilio NNR, Cors Erddreiniog NNR, Gwenfro). In 1989
it was found in the Isle of Man (Malaise trap at Cromle y
Veddy) by Stephen Crellin.
Habitat All known British sites are wetlands, those in East
Anglia including wooded sites as well as Phragmites beds.
The Anglesey sites include wet meadows with Phragmites
or Cladium mariscus; some were found in grazed Cladium
or grazed Molinia/Myrica areas.
Ecology Biology unknown, but it probably develops in soft
terrestrial fungi. Adults recorded from July to October.
Status Unclear; this species has only recently been found to
occur in Britain. Included in Chandler (1998b) and formally
added to the British list by Chandler (2001a). There are now
thirteen known British sites in four counties, all recorded
individuals being found in water or Malaise traps. Not listed
in Shirt (1987) or Falk (1991).
Threats Drainage of fens, reedbeds or water meadows and
any other agricultural improvement affecting the vegetation
structure; overgrazing or cutting too frequently or not on
rotation.
Management and conservation Maintain existing mosaic
of vegetation, limiting grazing and ensuring that any cutting
takes place on rotation. Avoid damage to soil structure or
removal of litter layer on which fungus hosts may develop.
Published sources Chandler (1998b, 2001a).
ALLODIA SILVATICA
A fungus gnat LOWER RISK (Nationally Scarce)
Order DIPTERA
Family MYCETOPHILIDAE
Allodia silvatica (Landrock, 1912)
Identification The male genitalia were figured by Landrock
(1912) and Zaitzev (1984).
Distribution Records scattered throughout England,
although mainly in the south-east and in South Wales:
Essex, Hertfordshire, Oxfordshire, Buckinghamshire,
Suffolk, Norfolk, Cambridgeshire, Derbyshire (Lathkill
Dale), Durham (Nesbitt Dene and Castle Eden Dene NNR);
Glamorgan.
Habitat Mainly in broad-leaved woodland, sometimes in
proximity to fens. The Essex site is a chalk quarry.
Ecology This species develops in Ascomycetes and has
been reared in Britain from the cup fungi Peziza repanda, P.
varia and Aleuria aurantia. Also reared abroad from the
genera Ptychoverpa, Discina, Gyromitra and Neogyromitra.
Adults recorded from May to October.
Status A local species with eighteen recorded post 1960
sites, fourteen of them post 1980.
Threats Clearance of woodland for agriculture or intensive
forestry. Removal of dead wood as some Peziza species
favour stumps although other hosts are terrestrial.
Management and conservation Maintain woodlands in a
natural state with all successional stages, retaining any dead
wood especially in damp shaded situations. Retain bare
areas on tracks, etc. where some of the host fungi are likely
to occur.
Published sources Buxton (1960); Chandler (1993b); Cole
& Chandler (1979); Edwards (1923, 1925); Kidd & Ackland
(1970); Perry & Langton (2000).
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