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Abstract
Indopottia irieandoana H.Akiyama sp. nov. is reported on the basis of two specimens from Doi Inthanon, northern Thailand, as a second species of a genus recently described from southern India. The lack of a peristome precludes unambiguous familial placement based on morphology, but phylogenetic analyses of sequences from a chloroplast and a mitochondrial locus place the new taxon, with strong support, in the Pottiaceae. Its epiphytic habitat on a tree trunk and a branch near the crown of an emergent tree and a strangler tree, respectively, along with morphological features such as spatulate leaves, a single dorsal stereid in the leaf costa, smooth laminal cells, long rostrate opercula, and eperistomate, upright capsules point to a close relationship to Indopottia zanderi. The morphology is compared with that of related genera. A key to similar genera and species is provided.
We thank Dr K. Sri-Ngernyuang (Maejo University) and Dr Kanya Santaqnachote (Chiang Mai University) for their kind assistance in the field surveys. We also owe much to the Office of National Research Council of Thailand for permission for our field researches in Doi Inthanon National Park, and Dr A. E. D. Daniels (Bryology Laboratory, Scott Christian College) who kindly lent us the holotype specimen of I. zanderi, and Dr R. Zander (Missouri Botanical Garden) for valuable comments on the manuscript. This study was supported by Grants-in-Aid for Scientific Research (no. 20405008) to Dr. M. Kanzaki (Kyoto University) from the Japan Ministry of Education, Culture, Science, Sports, and Technology and NSF grant DEB-0919284 to BG.
Taxonomic Additions and Changes: Indopottia irieandoana H.Akiyama sp. nov.