Title: Tribal Delimitation of Naucleeae (Cinchonoideae, Rubiaceae): Inference from Molecular and Morphological Data
Abstract: The circumscription of the tribe Naucleeae has been under debate for a long time. This is the first study to test if the previous circumscriptions are supported as monophyletic. Parsimony analyses of the rbcL sequence data of Rubiaceae, followed by separate and combined analyses of the ITS, rbcL, and morphological data were performed in attempt to propose a new tribal delimitation for Naucleeae. Results did not support any of the previous delimitations of Naucleeae. All favoured a broader circumscription, which includes not only all members of Naucleeae sensu Ridsdale, but also Cephalanthus, Hallea, Mitragyna, and Uncaria, formerly placed in Naucleeae, Corynanthe and Pausinystalia. Naucleeae sensu Ridsdale were shown to be monophyletic without support in the morphology- and combined ITS-rbcL-morphology-based trees. The tribe Coptosapelteae sensu Andersson & Persson appeared polyphyletic. A new tribe Hymenodictyoneae is created to accommo- date Hymenodictyon and Paracorynanthe. Descriptions and diagnostic features of the newly circum- scribed Naucleeae and Hymenodictyoneae are provided.
Publication Year: 2001
Publication Date: 2001-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 47
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