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

Skye, North Ebudes (1991); Braelangwell Wood, East Ross
(2002); Torboll Wood, East Sutherland (1999).
Habitat Wooded valleys.
Ecology There is a Russian record of association with
Fomes fomentarius, a bracket fungus found on Birch
(Betula) in Scotland, and a Japanese record from Panellus
serotinus. At Dulicht Wood and at Dulsie males were found
alighting on brackets of F. fomentarius on Birch. Adults
recorded from May to September.
Status Very localised within the Scottish Highlands,
although apparently widespread. Apart from two old records
it has been found only after 1960 (20 sites). Status revised
from RDB 2 (Shirt 1987).
Threats Clearance of native woodland for intensive forestry
and agriculture. Removal of dead wood or old and diseased
trees which may support breeding sites.
Management and conservation Retain any dead wood and
old or diseased trees, ensuring their continuity into the
future.
Published sources Chandler (2001a); Kidd & Ackland
(1970).
DYNATOSOMA NORWEGIENSE
A fungus gnat LOWER RISK (Near Threatened)
Order DIPTERA
Family MYCETOPHILIDAE
Dynatosoma norwegiense Zaitzev & Økland, 1994
Identification The male genitalia were figured by Zaitzev
& Økland (1994).
Distribution Only recorded from a few old forest sites in
southern England: East Coppice, Bloxworth, Dorset (15
September – 29 October 2004, J. Denton); The Knowles (16
July 1995 and 16 May 2002, I. Perry) and Denny Wood (9
July 1995, I. Perry), New Forest, Hampshire; Ashridge
Estate, Hertfordshire (8 July 1999, P.J. Chandler);
Bucklebury Common (12 July 1989, A.E. Stubbs; 6 June
1993, P.J. Chandler) and Windsor Forest (Malaise trap, 15
August 1994, via J. Brock), Berkshire;
Habitat Broad-leaved woodland.
Ecology Reared in Slovakia from the bracket fungus
Tyromyces chioneus (Ševčík 2003). Species closely related
to the present one (sharing its orange body coloration),
which have not been found in Britain, have been reared
from the sulphur polypore Laetiporus sulphureus in Europe.
However, searching Bucklebury Common in 1993 failed to
confirm the presence of this fungus or other suitable large
polypores. Mycetophilid larvae found in L. sulphureus at
other sites in Britain have proved to belong to Mycetophila
tridentata Lundström or Sciophila buxtoni Freeman. A
female at Bucklebury Common was found by sweeping tree
foliage, while males at Ashridge were amongst brushwood
around the base of an ancient chestnut (Castanea sativa)
trunk.
Status Unclear. Added to the British list in Chandler
(1994c) so not listed by Shirt (1987) or Falk (1991). This is
a large conspicuous species which could not easily be
overlooked. However, if occurrence on tree foliage is
regular it may usually be out of reach in the canopy.
Threats Clearance of native woodland for agriculture or
commercial forestry. Removal of over mature and diseased
trees or dead wood, on which host fungi are probably
dependent for their survival.
Management and conservation Maintain woodland in a
natural state, retaining over mature trees and dead wood
with their associated fungi, ensuring continuity of this
habitat in the future.
Published sources Chandler (1994c, 2001a); Zaitzev &
Økland (1994).
ECTREPESTHONEURA COLYERI
A fungus gnat LOWER RISK (Nationally Scarce)
Order DIPTERA
Family MYCETOPHILIDAE
Ectrepesthoneura colyeri Chandler, 1980
Identification Keyed by Chandler (1980) and Hutson,
Ackland & Kidd (1980).
Distribution Widely scattered records through much of
Britain: Cottwood, Devon (1989); Langley Wood (1978)
and Savernake Forest (1990, 1991), Wiltshire; Sutton
Common, Dorset (1990); Ridley Wood (1953) and Mark
Ash Wood (1987, 1988, 1989), New Forest, Hampshire;
Three Bridges, Sussex (1892); Wychwood NNR,
Oxfordshire (1989, 1990); Burnham Beeches NNR,
Buckinghamshire (1990, 1995-6, 1999); King’s Forest,
Suffolk (1991, 1995, 2000, 2002); Buckingham Thick
Copse, Northamptonshire (1989, 1990); Moccas Park NNR,
Herefordshire (1997); Madeley, Staffordshire (1938);
Oxwich NNR, Glamorgan (1989); Dinefwr Deer Park,
Carmarthenshire (1996); Coed Tycanol NNR,
Pembrokeshire (1999); Hafod Garregog NNR,
Caernarvonshire (1999); Chirk Castle Park, Denbighshire
(1996); Camusurich (1979), Pass of Killiecrankie (1997-8),
Dall Burn, Rannoch (1997) and Brackland Glen Wood,
Callander (1992), Perthshire; Bonhill, Dunbartonshire
(1909).
Habitat Broad-leaved woodland, especially the more
ancient sites with a good amount of dead wood.
Ecology Obtained in emergence traps over rotten logs in
Norway by Martinsen & Söli (2000) and possibly associated
with encrusting fungi like the common species E. hirta
(Winnertz), which was found in the same traps.
Status Until recently a poorly known species with only
three pre-1980 records, but it has since been found to be
widespread in old woodland and parkland with 20
additional sites already reported. It was found to be
numerous during surveys of Wychwood NNR and
Savernake Forest. Status revised from RDB 2 (Shirt 1987
and Falk 1991).
Threats Clearance of woodland for intensive forestry or
agriculture. Removal of any dead wood or old or diseased
trees which might support breeding sites.
Management and conservation Retain any dead wood and
old or diseased trees, ensuring their continuity into the
future.
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