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SUMMARY
Icelandic land snails
(Gastropoda, Pulmonata);
New species and notes
on distribution
by
Árni Einarsson,
Institute of Biology,
University of lceland,
Grensásvegur 12, Reykjavík, Iceland,
Jón Porvaldsson,
Geitland 6, Reykjavík, Iceland,
and
Hálfdán Björnsson,
Kvísker, Örœfi, Iceland
Intensive sampling effort during the past
decade has revealed three species of land
snails not recorded before from Iceland.
They are: Vertigo substriata (Jeffreys), V.
lilljeborgi (Westerlund) and Carychium
tridentatum (Risso). One fullgrown indi-
vidual of V. substriata (Fig. 1) was found in
a grass slope at the waterfall Selja-
landsfoss, South Iceland. A number of
V. lilljeborgi (Fig. 2) were found in mar-
shes at the Reynivellir and Fagurhólsmýri
farms, South-East Iceland. Several speci-
mens of C. tridentatum (Fig. 3) were found
in a grass slope at Seljalandsfoss, South
Iceland.
Columella aspera (Waldén), apparently,
has two centres of distribution in Iceland
(Fig. 4), one in Borgarfjörður, West Ice-
land, the other in South-east Iceland
where a number of specimens can easily be
collected in a short time. In other localities
only a few individuals have been found.
A colony of Zonitoides nitidus (Muller)
has been found in a hot spring area near
the village Hveragerði, South Iceland.
Balea perversa (L.) is recorded from the
Þorvaldseyri farm in South Iceland, a
locality which is outside its previously
recorded range in South-East Iceland.
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