Taxonomic revision and cladistic analysis of Diphyscium (Family Diphysciaceae) of Taiwan

Tzen-Yuh Chiang, S. H. Lin

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Six species of Diphyscium, with three new additions to the moss flora of Taiwan, are revised taxonomically, including D. chiapense Norris ssp. unipapillosum (Deguchi) T. Y. Chiang and S. H. Lin, stat. nov. Diagnosable keys are provided. In order to test Norris' and Deguchi et al.'s classifications, cladistic analyses were carried out on eleven morphological traits scored from nine Asiatic species of Diphyscium. Two equally parsimonious trees rooted at the Theriotia species were recovered by PAUP. The reconstructed phylogeny, which suggested a close relationship between the taxa with single papillose lamina cells and the species with pluripapillose lamina cells, invalidated Norris' hypothesis. The parsimony tree agrees with Deguchi et al.'s classification, in which three groups were classified based on cell-wall papillosity. Based on the inferred phylogeny, the "orifice" stomata may have evolved more than once in Diphyscium, while a single "secondary loss" event occurred in the group of D. involutum, D. rupestre, D. mucronifolium and D. suzukii.

Original languageEnglish
Pages (from-to)215-222
Number of pages8
JournalBotanical Bulletin of Academia Sinica
Volume42
Issue number3
Publication statusPublished - 2001

All Science Journal Classification (ASJC) codes

  • Plant Science

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