We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A new phylogeny-based generic classification of Costaceae (Zingiberales).
- Authors
Specht, Chelsea D.; Stevenson, Dennis Wm.
- Abstract
Recent cladistic analysis of multiple molecular data from chloroplast and nuclear genomes as well as morphological data have indicated that a reclassification of the family Costaceae is necessary in order to appropriately reflect phylogenetic relationships. The previously described genera Tapeinochilos, Monocostus, and Dimerocostus are all upheld in the new classification. Monocostus and Dimerocostus are found to be sister taxa. The large pantropical genus Costus is found to be polyphyletic and is thus divided into four genera, three of which are new (Cheilocostus, Chamaecostus, Paracostus). Costus has now a more concise generic concept including morphological synapomorphies previously absent due to the polymorphic nature of the prior non-monophyletic assemblage. Of the three new genera, one (Paracostus) was previously recognized as a subgenus of Costus. Cheilocostus comprises several Asian taxa and is sister to Tapeinochilos, whereas Chamaecostus comprises entirely neotropical taxa and is sister to a neotropical Monocostus + Dimerocostus clade. A reevaluation of the traditional taxonomy indicates that floral characters and pollination syndromes commonly used to identify groups exhibit homoplasy when analyzed in a cladistic framework and are thus unreliable as taxonomic indicators.
- Subjects
ZINGIBERALES; COSTUS; CHLOROPLASTS; GENOMES; CLADISTIC analysis of plants; TAXONOMY
- Publication
Taxon, 2006, Vol 55, Issue 1, p153
- ISSN
0040-0262
- Publication type
Article
- DOI
10.2307/25065537