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A new species of moss emerges from molecular and morphological data: Schistidium memnonium sp. nov. (Grimmiaceae, Bryophyta)

Abstract Schistidium memnonium is described as a new species from Europe, based on molecular and morphological data. The species is described and illustrated, its affinities are discussed, and its current distribution mapped. The species is distinguished by its ovate to ovate-triangular leaves, unistratose lamina in lower part, occasionally with 2-stratose spots or short striae, in central and upper part varying from 1-stratose to 2-stratose in spots and striae, recurved leaf margins from the base to near the apex on both sides, in lower part mostly 1-2˗stratose for 1(2) rows, in upper and central part 2-3˗stratose for 1–2 rows and oblong to long rectangular or long obovate exothecial cells in central part. A table with characters to distinguish this species from S. brunnescens (both subspecies), two taxa morphologically very similar, and a phylogenetic analysis in order to detect relationships of the new species with nearby taxa, based on rDNA ITS region, are provided.