Erythrophyllopsis perlaticosta MJCano & JAJimenez (Pottiaceae) a new species from the Peruvian Andes

Introduction. Over the last years we have been engaged in studies of the South American Pottiaceae. Among the bryophyte specimens collected by us in central and northern Peru, some samples of a puzzling Pottiaceae were found. In this paper, we present our arguments for recognising these plants as a new species and its inclusion in Erythrophyllopsis Broth. Key Results. It differs most saliently from other species of Erythrophyllopsis by the combination of its oblong-ovate to ovate-lanceolate leaves, with usually fragile apex, leaf margins papillose-crenulate from apex to lower third, sometimes erose or crenate, lamina unistratose, occasionally bistratose in patches, costa broad, usually ending below the apex, without dorsal stereids near the apex where they are replaced by cells similar to those of the lamina, and short and straight peristome teeth. Conclusions. A new moss species, Erythrophyllopsis perlaticosta M.J.Cano & J.A.Jimenez, is described and illustrated from the Andean highlands in central and northern Peru. A revised identification key for the species of Erythrophyllopsis is also provided. This species grows in crevices or fissures of calcareous rocks or banks between 3050 and 4700 m. The principal distinctive characters that separate it from the nearest species of Erythrophyllopsis and related genera such as Bryoerythrophyllum P.C.Chen and Mironia R.H.Zander are discussed.