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Molecular phylogeny of tribe Schismatoglottideae (Araceae) based on two plastid markers and recognition of a new tribe, Philonotieae, from the neotropics

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Abstract:

Tribe Schismatoglottideae comprises one large genus, Schismatoglottis, and six small 'satellite' genera. A combined molecular phylogenetic analysis of matK, the 3′ portion of the trnK intron, and trnL-F sequence data was carried out on 77 taxa representing all genera in the tribe, all informal groups in Schismatoglottis, together with sister tribe Cryptocoryneae, and outgroups from Araceae. Analyses of combined datasets with parsimony, maximum likelihood, and Bayesian methods revealed tribe Schismatoglottideae to be a polyphyletic assemblage. Neotropical Schismatoglottis is shown to be sister to the palaeotropical Schismatoglottideae + Cryptocoryneae. Schismatoglottis acuminatissima is a sister clade to the rest of the Schismatoglottideae. Palaeotropical Schismatoglottis is unsupported as a monophyletic genus. A new neotropical tribe of Araceae, Philonotieae S.Y. Wong & P.C. Boyce, sister to Cryptocoryneae + palaeotropical Schismatoglottideae, is proposed.

Keywords: ARACEAE; MOLECULAR SYSTEMATICS; PHILONOTIEAE; SCHISMATOGLOTTIDEAE; TAXONOMY

Document Type: Research Article

Affiliations: 1: Department of Plant Science and Environmental Ecology, Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Samarahan, Sarawak, Malaysia; School of Biological Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia 2: Forest Herbarium (BKF), The Office of Forest and Plant Conservation Research, National Park, Wildlife and Plant Conservation Department, 61 Phahonyothin Road, Chatuchak, Bangkok, 10900 Thailand 3: School of Biological Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia 4: Institute of Biodiversity and Environmental Conservation, Universiti Malaysia Sarawak, 94300 Samarahan, Sarawak, Malaysia

Publication date: 2010-02-01

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