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122 Гураль-Сверлова Н. В., Гураль Р. І.

Gural-Sverlova N.V., Gural R.I.
New data on the distribution of anthropochorous species of land molluscs in western regions of
Ukraine and possible approaches to their classification
On the basis of own data, materials transferred to the laboratory of malacology or the
malacological collection of the State Museum of Natural History of the National Academy of Sciences
of Ukraine in Lviv, as well as a critical analysis of observations in two citizen science databases
(iNaturalist, UkrBIN), new records of some anthropochorous land mollusc species in Western Ukraine,
and in particular, in Lviv and its immediate surroundings, are described. In tabular form, the temporal
and spatial presence in the western part of Ukraine of 23 species that could appear here only due to
anthropochory is analyzed. Maps of the findings of Cepaea nemoralis, Deroceras caucasicum,
Oxychilus draparnaudi, and O. translucidus in and near Lviv are given. Known reliable localities of
C. nemoralis in Volyn, Ivano-Frankivsk, Lviv, Rivne, Ternopil, and Khmelnytskyi regions are listed.
Similar information is presented for the related species Cepaea hortensis from all administrative
regions of Western Ukraine, except for Lviv region, where this species is widespread in settlements.
According to the time of penetration into Western Ukraine, among the anthropochorous species of land
molluscs, relatively recent invaders prevail, which were first reliably discovered not earlier than in the
1990s. At the turn of the 20th and 21st centuries, optimal conditions for the introduction and subsequent
acclimatization in urbanized biotopes of many adventitious species of land molluscs, in particular
thermophilic species of Mediterranean or Crimean origin, emerged in Western Ukraine. In addition to
global warming, this was facilitated by the intensification of trade and transport links with other
regions of Ukraine and other European countries, as well as the activities of garden centres. Besides
the time of entry into the analyzed area, anthropochorous species of land molluscs can be classified
according to the ways of this penetration (from other regions of Ukraine or from other European
countries located to the west of it), the nature of their present distribution in Western Ukraine, as well
as the ability or inability to enter natural biotopes outside settlements.
Key words: anthropochory, introduced species, land molluscs, western regions of Ukraine.