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Didymodonmanhanensis (Pottiaceae, Bryophyta), a new species from Inner Mongolia steppe, China and its phylogenetic
Chao Feng1, Guo-Li Zhang2, Ting-Ting Wu2
1College of Grassland, Resources and Environment, Key Laboratory of Grassland Resources, Ministry of Education China, Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture, Inner Mongolia Agricultural University, Hohhot 010011, China. Inner Mongolia Agricultural University Hohhot China.
Abstract:
Inner Mongolia steppe is one of the suitable habitats for Didymodon species and a new species, Didymodonmanhanensis C. Feng & J. Kou from Manhan Mountain in semi-arid region in Inner Mongolia, China is described and illustrated. It is characterised by leaves incurved and slightly twisted when dry, spreading when moist, narrowly lanceolate from an ovate base; subulate and fragile leaf apices; distally bistratose leaf margins that are recurved in proximal 2/3-3/4; excurrent costa with guide cells in 2-3 layers and without ventral stereids; smooth laminal cells and red KOH laminal colour reaction. Our morphological analyses and molecular results, based on DNA sequences of ITS, rps4 and trnM-trnV, confirm that D.manhanensis belongs to a group that includes D.obtusus J. Kou, X.-M. Shao & C. Feng and D.daqingii J. Kou, R.H. Zander & C. Feng. This new species is compared with similar species and its phylogenetic position and ecology are discussed.
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