According to cpDNA trnLUAA intron and partial nrDNA ITS2 sequences, the Slovakian endemic Ochyraea tatrensis Váňa (formerly Hypnobartlettiaceae) is closely related to Hygrohypnum smithii (Amblystegiaceae), which grows nearby at the type locality of Ochyraea. The sequences of both species are identical (trnLUAA intron) or differ only in two substitutions (ITS2). It is concluded that the monospecific Ochyraea, like Hypnobartlettia fontana itself, does not deserve being segregated into a separate family, but belongs to the Amblystegiaceae. The genus Ochyraea should be maintained, first with regard to the gametophytic differences between O. tatrensis and Hygrohypnum, and second because Hygrohypnum, and in particular H. smithii, might be not monophyletic according to the molecular data.
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Vol. 104 • No. 2