Phylogenetic Systematics of the Anoles: Is a New Taxonomy Warranted?

نویسندگان

  • DAVID C. CANNATELLA
  • KEVIN DE QUEIROZ
چکیده

4). For the form of additive binary coding in which it is the branches that are coded, there must be a branch placed below the bottom-most character state, and that branch must contribute a derived code for all of the states in the tree (i.e., the minimum pathlength from each of the character states to the base of the tree passes through that branch). O'Grady and Deets (1987) remarked that altered additive binary coding requires one fewer column of tree-encoding characters than does standard additive binary coding; but this reduction is eliminated with the placement of a branch below the bottom-most character state. We conclude by noting that, at the base of the multistate character tree, only one of the tree-encoding characters should change states. With nonredundant linear coding, for example, the topology of the tree could also be maintained by assigning a primary derived code to all of the treeencoding characters at the base. Such a practice, however, would create problems with unjustified weighting. ACKNOWLEDGMENTS

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تاریخ انتشار 2008