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

hedgerows. Removal of any old trees or dead wood which
might support suitable fungi.
Management and conservation Maintain woodlands in a
natural state, retaining old or diseased trees and dead wood.
Maintain old hedges and associated ditches with a diverse
structure including mature trees, shrubs and herbaceous
vegetation to provide shelter, retaining any dead wood.
Published sources Edwards (1925); Hutson, Ackland &
Kidd (1980); Judd (1999b).
MYCOMYA PECTINIFERA
A fungus gnat LOWER RISK (Nationally Scarce)
Order DIPTERA
Family MYCETOPHILIDAE
Mycomya pectinifera Edwards, 1924
Identification Keyed by Hutson, Ackland & Kidd (1980).
Distribution South-west England and South Wales:
Cornwall (Antony, 1972; Peter’s Wood, 2000); Devon
(eighteen sites, 1987 to 1989); Somerset (ten sites, 1985,
1986, 2004); Wiltshire (5 sites, 2003, 2004); Dorset
(Woolcombe, 1987); Gloucestershire (4 sites, 2002, 2004);
Glamorgan (Mill Woods, Penrice, 1994); Carmarthenshire
(Dinefwr Deer Park, 1996).
Habitat Most sites are broad-leaved woodland with streams
and damp areas; the earlier Cornwall site is a wood by an
estuary.
Ecology Biology unknown. The larvae of this genus have
been reared from fungi or associated with fungi on dead
wood and are web spinners, living on the surface of the
substrate. Adults recorded from June to October.
Status The 42 known sites are all post 1970 and it had
probably been overlooked previously because of its
apparently restricted distribution in Britain. However, it has
proved to be one of the commonest species of
Mycetophilidae in some of the Devon and Somerset sites. In
view of a wide European distribution its restriction to the
south-west is difficult to explain. Status revised from RDB
1 (Shirt 1987) and from RDB 3 (Falk 1991).
Threats Clearance of native woodland for agriculture or
intensive forestry. Removal of any dead wood and old or
diseased trees which may support suitable fungi.
Management and conservation Maintain woodland in a
natural state, retaining any old trees or dead wood,
especially in damp shaded situations conducive to fungal
growth. Avoid drainage of marshy areas and ensure that
woodland streams remain shaded and undisturbed.
Published sources Chandler (1987b, 1992b); Hutson
(1978); Hutson, Ackland & Kidd (1980); Hutson & Kidd
(1975); Levey & Pavett (2000a).
MYCOMYA PERMIXTA
A fungus gnat LOWER RISK (Near Threatened)
Order DIPTERA
Family MYCETOPHILIDAE
Mycomya permixta Väisänen, 1984
Identification The male genitalia were figured by Väisänen
(1984) and by Chandler (1987b).
Distribution Five known sites in the Scottish Highlands:
Aberfoyle (6, 14 and 18 September 1905, A.E.J. Carter) and
Balquhidder, Stob Brona (2 October 1966, G. Hosie),
Perthshire; Grantown-on-Spey, Elgin (20 September 1989,
P.J. Chandler); Creag an Lochainn (15 September 2000, I.
Perry) and Reelig Glen, Easterness (1999, P.J. Chandler).
Habitat Broad-leaved woodland. The Grantown-on-Spey
record was from the Birch (Betula) and aspen (Populus
tremula) woodland on the south bank of the River Spey.
Ecology This has been reared from the bolete Leccinum
scabrum in Europe. It is unclear whether larvae had the
surface web spinning habit found in other species of this
genus which have been reared. Adults recorded in
September and October.
Status A poorly known species, which was confused with
the related spring-flying Mycomya maura (Walker) (a
frequent southern species) until the revision of the genus by
Väisänen (1984) and thus it may have been overlooked
elsewhere. Not listed in Shirt (1987). Status revised from
RDB 1 (Falk, 1991).
Threats Clearance of woodland for intensive forestry or
agriculture.
Management and conservation Maintain woodlands in a
natural state with a mosaic of habitats. Retain any mature
trees and avoid damage to soil structure which could affect
mycorrhizal fungi.
Published sources Chandler (1987b, 1992b); Väisänen
(1984).
MYCOMYA PUNCTATA
A fungus gnat
Order DIPTERA
Mycomya punctata (Meigen, 1804)
DATA DEFICIENT
Family MYCETOPHILIDAE
Identification Keyed by Hutson, Ackland & Kidd (1980).
Distribution Only two British records: near Fort William,
Westerness (30 August 1921, J.J.F.X. King); Cluadale,
Eigg, North Ebudes (28 May 1970, A.M. Hutson).
Habitat Unclear.
Ecology Biology unknown. The record from Trametes cited
by Yakovlev (1994) is old and may not relate to this
species, the name having been used in some earlier
literature for the common species Mycomya marginata
(Meigen). The larvae of this genus have been reared from
fungi or associated with fungi on dead wood and are web
spinners, living on the surface of the substrate.
Status Unclear. The Westerness specimen was labelled only
“three mile west” and was thought to be from near Glasgow
97