Reliktný druh Catoscopium nigritulum (Bryophyta) na slatinných rašeliniskách Západných Karpát (Slovensko)

Catoscopium nigritum (Hedw.) Brid. is bipolar moss species, with a large circumpolar distribution range in the Northern Hemisphere. The centre of its distribution range lies at high latitudes. At its southern range limit, its occurrence is scattered and restricted to the mountains. The same distribution pattern is known from the West Carpathians (Slovakia), where the species is rare and endangered, and where most records came from the alpine belt of the Belianske Tatry Mts. Besides mountains, the species has been rarely recorded in the calcareous fens in the altitudes of 680–940 m a.s.l., where it probably represents the relict from the Late Glacial. Occurrence in fens is restricted to the foothills of the Malá Fatra Mts, Popradská kotlina basin and Slovenský raj National Park, where 6 localities have been recorded. In this study, the recent distribution of C. nigritum in Slovak fens is reviewed and data about vegetation and environmental conditions of fens with its occurrence are presented.