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First findings of the non-native slug Deroceras panormitanum from the Czech Republic are reported. First anatomically identified specimens were collected in a greenhouse in SW Bohemia. In N Moravia the species was however found in a natural habitat already in 1996.
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The checklist of 245 mollusc species known so far from the Slovak Republic is presented, plus 11 species limited to greenhouses or thermal waters. Critical comments on species erroneously mentioned in recent publications from Slovakia are included.
The first records of Oxychilus hydatinus (Rossmässler, 1838) from Slovakia are reported. The material was identified based on a detailed comparative study of shell morphology and internal structure of penis. The Slovak sites represent the northernmost occurrence of this species.
91 mollusc species were recorded from 92 sites in the Bukovské vrchy Mts (Slovakia) as a result of the recent malacological research, combined with earlier published and unpublished data. The most important communities of predominantly East Carpathian species occur throughout the deciduous woodlands dominated by beech. The mollusc communities are characterised by low numbers of individuals dispersed over large areas. Rich malacocoenoses are confined to scattered favourable habitats, such as well vegetated base-rich seepages, landslide scars and water-logged depressions, as well as at fresh calcareous outcrops or screes. A detailed snail succession from Holocene slope sediments at the Krivoštianka (Humenské vrchy Mts) provides the most complete record from the Slovak East Carpathians and is the most detailed yet published from this region. The mollusc succession differs from the standard faunal developmental pattern of Central Europe due to the absence of a considerable number of common Central European species, whose succession is well known at present.
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120 mollusc species (50% of the Czech Republic mollusc fauna) were recorded from the Rychlebské Hory (Czech Republic, Silesia), as a result of the recent malacological research of 33 sites, combined with earlier published and unpublished data.The most diverse communities were those of forest valleys and old limestone quarries.New isolated sites of Helicella itala (Linnaeus) (the easternmost occurrence) and Chondrina clienta (Westerlund) were found.Based on the revision of Helicellinae of this region we think that Cernuella neglecta (Draparnaud) should be deleted from the list of Polish gastropods.The previous single record was a result of confusion with H. itala.The ecological and zoogeographical composition of the mollusc fauna confirms the transitory character of the Rychlebské Hory.
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