A tiny terrestrial snail Vertigo geyeri is an example of a typical late-glacial relict in the central Europe. It inhabits exclusively treeless fens and is highly endangered in most of its area and internationally protected. So far, only three recent and highly isolated populations have been found in the Czech Republic. The first one, a small calcareous spring fen located in the V Dubech Nature Monument was however damaged by construction of drainage canals and summer droughts in the last few years and the future survival of this population is doubtful. New sites found in 2011 (the Louky u Jeníkova NM and the Ratajské rybníky NM) document that the species is still extant in the Czech Republic at more sites than previously thought., Jan Myšák, Michal Horsák, Jaroslav Č. Hlaváč., and 4 barev. fot.
The tiny land snail V. geyeri is a highly endangered species, exclusively inhabiting alkaline tree-less spring fens. After two unexpected findings in the Bohemian-Moravian Highlands, we explored this region more properly and found another 18 sites, including Nature Reserve Řeka with the richest known European population. V. geyeri is threatened mainly by hydrological changes, eutrophication and cessation of traditional management practices. and Veronika Schenková, Michal Horsák.
During the last 12 years, 23 mollusc species were recorded in the Czech Republic for the first time. With the exception of several introduced and invasive species, some of these molluscs are native, rare and even endangered, including Pagodulina pagodula. This rare woodland snail of Alpine origin was found in spring 2012 in the Mutenská obora Nature Reserve, which includes the forested slopes above the Moravská Dyje River in South Moravia. This is another occurrence of the species outside its Alpine range, in addition to one site in Poland, two in Slovakia, and a few sites in Hungary and the Balkan Peninsula. The species was also recorded in the Czech Republic in several interglacial sediments of the Pleistocene and also in one profile of Holocene origin (Atlantic period), not far away from the recent site. and Adam Lacina, Michal Horsák.
Vrkoč rašelinný (Vertigo lilljeborgi) je jedním z mála evropských suchozemských plžů, vázaných na minerálně chudá stanoviště. Jeho typickým biotopem jsou podmáčené ostřicové mokřady a trvale vlhká slatiniště s výskytem rašeliníků. Hojný je především v boreální zóně Skandinávie, naproti tomu ve střední Evropě se jako glaciální relikt vyskytuje jen na několika roztroušených, silně izolovaných lokalitách. V létě roku 2012 byl vrkoč rašelinný poprvé nalezen v České republice, a to nezávisle hned ve dvou oblastech – na Šumavě a Českomoravské vrchovině. Vzhledem k ohroženosti a vzácnosti jeho biotopů jsme se rozhodli stručně představit ekologii, rozšíření a nové nálezy tohoto zajímavého a vzácného suchozemského plže., Vertigo lilljeborgi is one of few European land snail species which are restricted to minerally poor habitats. It typically inhabits wet sedge marches and groundwaterfed fens with the occurrence of Sphagnum mosses. In Central Europe, the species represents a rare glacial relict, distributed mainly in the boreal zone of Europe and at several isolated sites southwards. In the summer of 2012, V. lilljeborgi was recorded from the Czech Republic for the first time, independently in two different regions: the Bohemian Forest and the Bohemian-Moravian Highlands. We present brief information about the ecology, distribution and new records of this unique and rare species., and Veronika Schenková, Jaroslav Čáp Hlaváč, Michal Horsák.