Fróðskaparrit - 01.01.2009, Side 123

PLANTUVØUR OC VØLAMÍGC) (DIPTERA: CECIDOMYIIDAE) í FØROYUM
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Fig. 4. Distribution area of
Oligotrophus juniperinus in
Europe. Corrected according to
comments ofP.H. Enckell,
27.7.2009
parts of Europe it occurs mainly in the mountains.
The host plantJuniperus communis, is a Holarctic
species and occupies a large distribution area in the
cool temperate Northern Hemisphere from Arctic
south in mountains to around 30°N latitude in North
America, Europe and Asia. Oligotrophus juniperinus
occupies only a small part of the distribution area of
its host plant spread in Europe.
Vgrtical occurrence. 0. juniperinus occurs over a large
altitudinal span including sites in the planare zone up
to sites in the Alpine zone. Bisamberg, 190 m a.s.l. in
north-eastern Austria was the lowest situated locality
where galls were found and the Mount Kanzel, 2348 m
a.s.l. in the Alps in northern Italy is the highest point of
its known vertical occurrence (Skuhravá, 1987, 1997,
Skuhravá and Franz, 1989, Skuhravá et al., 2002). O.
juniperinus has a large ecological tolerance and is able
to inhabit places that are distant vertically each other
°f more than 2000 meters. O. juniperinus may be
considered to be a sub-boreal and Alpine species.
Clinodiplosis cilicrus (Kieffer, 1889)
Larvae of this species develop in decaying plant matter.
They were found in samples among decaying leaves of
Sorbus aria (Rosaceae) together with swollen flower
buds caused by the gall midge Contarinia floriperda.
Locality: Streymoy, Tórshavn, private garden, 6.8.2005.
Distribution. C. cilicrus is a Euro-Siberian species
(Skuhravá, 1997). It was described by Kieffer (1889) as
Diplosis cilicrus from France. He discovered larvae living
gregariously in flower heads of several host plant
species of the family Asteraceae, viz. Centaurea jacea
L., C. scabiosa L., Cirsium vulgare (Savi) Ten. (= C. lan-
ceolatum Scop.) and Carlina vulgaris L. Larvae lived
between achenes. Skuhravá (1973) demonstated in
experiments, that the larvae of C. cilicrus are
phytosaprophagous and develop in decaying plant
matter.
Feltiella acarisuga (Vallot, 1827)
Larvae feed on many tetranychid mites (Acarina:
Tetranychidae). Larvae of this species were found
among mites in samples of decaying leaves of Sorbus
aria (Rosaceae) brought for examination.
Locality: Streymoy, Tórshavn, private garden, 6.8.2005.
Distribution. It is probably primarily a European
species, at present known to be distributed in several
continents and considered therefore to be of
cosmopolitan distribution (Cagne, 2004). It was
originally described by Vallot (1827) as Cecidomyia