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

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taxonomic revisions
Taiwan
phylogeny
taxonomy
stomata
mosses and liverworts
flora
cell walls
cells
testing

All Science Journal Classification (ASJC) codes

  • Plant Science

Cite this

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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.",
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Taxonomic revision and cladistic analysis of Diphyscium (Family Diphysciaceae) of Taiwan. / Chiang, Tzen-Yuh; Lin, S. H.

In: Botanical Bulletin of Academia Sinica, Vol. 42, No. 3, 2001, p. 215-222.

Research output: Contribution to journalArticle

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