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

Exechiopsis dumitrescae Burghele-Balacesco. First found in Britain by suction trapping at Monks Wood
NNR in 1972, this species is now known from more than 30 sites scattered throughout Britain in 16
counties and is found in broad-leaved woodland.
Exechiopsis fimbriata (Lundström). This was little known with a few scattered sites but has been found
with increasing frequency on the autumn dipterists’ forays in recent years and is now known from more
than 50 sites, 20 added since 1995. It is usually found in small numbers and is possibly under-recorded
due to low population levels.
Exechiopsis ligulata (Lundström). This is now known to be distributed throughout Britain with more
than 40 sites recorded. It too has proved quite frequent as a member of the October woodland fauna
during autumn field meetings in recent years.
Exechiopsis pollicata (Edwards). Once thought to be a rarity, there are now at least 40 site records, 34 of
them post 1960. Although it is usually found singly, it is widely distributed and several recent records are
from urban or suburban situations, suggesting that it may often exist in garden habitats.
Exechiopsis pseudindecisa Laštovka & Matile. This was originally confused with E. indecisa
(Lundström), which appears the commoner species. However, the scatter of recent records suggests that
both species are probably under-recorded.
Megalopelma nigroclavatum (Strobl). Although this species was recorded from only eleven sites up until
1986, it has now been found in 56 sites of which 45 are post 1980. It is widespread in England and Wales
but there are only two known Scottish sites (Logie, Elgin, 1909, 1910; Brechin, Forfarshire, 2004). It
now appears frequent in the south so may have been overlooked previously.
Megophthalmidia crassicornis (Curtis). Widespread in southern England and Wales, this species is now
known from more than 50 sites, 38 of which are post 1960. It is found in broad-leaved woodland, as well
as old mature hedges adjacent to carr and wetlands.
Mycetophila autumnalis Lundström. This species is known from 32 sites, all but one of which are since
1980, in Wales and England north to Yorkshire, with one recent record from Scotland (River Spey,
Grantown-on-Spey, 2002). It has been found in old broad-leaved woodland.
*Mycetophila eppingensis Chandler. Recently described from material found at Epping Forest, Essex,
Spartum Fen, Oxfordshire and Leckford, Hampshire (Chandler 2001a), then recorded from Dowlings
Wood (2000) and Monk Woods (2000), Somerset (Gibbs 2002). In addition there are recent unpublished
records from Dinton Pastures Country Park, Berkshire (2001) and the following sites in 2003: Chigwell
Row Wood, Essex; Boundless Copse, Surrey; King’s Forest, Suffolk; Thompson Common, Norfolk. This
is clearly a scarce species found only in woodlands, but it is evidently widespread and may have
increased in recent years, so it would be premature to assign a conservation status.
Mycetophila freyi Lundström and M. stolida Walker. These two species have often been confused with
each other and their separation still gives problems. As both species are considered relatively frequent
and both are found throughout Britain, it is considered advisable to omit them from conservation status.
Mycetophila hetschkoi Landrock. This species has mainly a northern and western distribution in England,
with just three records for Wales and four for Scotland. All but two of the 61 site records are post 1980.
It has been found in damp broad-leaved woodland, where the larvae develop in soft fungi.
Mycetophila magnicauda Strobl. A northern and western species with most records for Scotland, with
fewer records for Wales and northern England. There are nearly 40 post 1960 sites. The larval biology is
unknown; larvae probably develop in lignicolous fungi and adults have been found in damp, mainly
broad-leaved woodland.
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