Bryoerythrophyllum duellii Blockeel (Bryophyta: Pottiaceae), a new moss species from Greece and Cyprus, and its molecular affinities

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A moss first collected on Crete by Prof. Ruprecht Düll in 1976 but never satisfactorily identified is described as a new species, Bryoerythrophyllum duellii. It is known from five localities in Greece and Cyprus. It belongs to the B. recurvirostrum group, and its status as a distinct taxon is supported by molecular data. The molecular relationships of the genus Bryoerythrophyllum are discussed, and they suggest that the genus is monophyletic only if Erythrophyllopsis, Mironia and Saitobryum are included. The B. recurvirostrum and B. wallichii groups apparently form a young complex of taxa that are not very diverse molecularly, but sometimes have a distinctive morphology. Bryoerythrophyllum duellii is one of several lineages within this complex that may have experienced a longer period of reproductive isolation leading to the fixation of distinctive morphological and molecular features.