Department of Plant Sciences - Research Colloquium
Abstract:The Araceae ((aroids) are predominantly tropical in distribution, with 90% of the 110 genera, and c. 95% of c. 4000+ species restricted to the everwet or perhumid tropics. Tribe Schismatoglottideae is the most speciose and diverse aroid taxon in Borneo, comprising in excess of the 100 species of which over 95% are endemic. Besides the largest genus, Schismatoglottis Zoll. & Moritzi, the tribe includes, four small â€˜satelliteâ€™ genera, Aridarum Ridl., Bucephalandra Schott, Phymatarum M. Hotta and Piptospatha N.E. Br. that are endemic to Borneo, except the last, which extends to the Malay Peninsula and Southern Peninsular Thailand. Schismatoglottis itself extends from Myanmar (Burma) to Vanuatu, and Southern China to New Guinea, but it is most abundant and diverse in Borneo. Molecular phylogenetic research of the Araceae (Cabrera et al., 2008; BarabÃ© et al., 2004) has established the monophyly of the Schismatoglottideae but considerable research remains to be done to resolve generic boundaries within the tribe.
Recent and on-going research of the Schismatoglottideae includes alpha-taxonomy and ecological studies have provided a stable species platform from which to describe the considerable novelties still known to exist, and from which to test hypotheses of infra-tribal, and intergeneric phylogenetic processes. Therefore, this study is carried out to resolve by use of molecular methodologies the internal phylogeny of the tribe using molecular methodologies. Schismatoglottis sensu Hay & Yuzammi and Piptospatha sensu Bogner & Hay are polyphyletic assembledges. A new tribe and 5 new genera are proposed with the resurrection of one genus.
Last Updated (Thursday, 05 March 2009 00:03)