• Editor’s Introduction – Chris Simon.

• Combined Data, Bayesian Phylogenetics, and the Origin of the New Zealand Cicada Genera – Thomas R. Buckley, Peter Arensburger, Chris Simon, and Geoffrey K. Chambers.
  
  
• Increased Congruence Does Not Necessarily Indicate Increased Phylogenetic Accuracy--The Behavior of the Incongruence Length Difference Test in Mixed-Model Analyses – Mark Dowton and Andrew D. Austin.
  
  
• Inferring the Root of a Phylogenetic Tree – John P. Huelsenbeck, Jonathan P. Bollback, and Amy M. Levine.
  
  
• Molecular Systematics of the Eastern Fence Lizard (Sceloporus undulatus): A Comparison of Parsimony, Likelihood, and Bayesian Approaches – Adam D. Leaché and Tod W. Reeder.
  
  
• Delimiting Species Using DNA and Morphological Variation and Discordant Species Limits in Spiny Lizards (Sceloporus) – John J. Wiens and Tonya A. Penkrot.
  
  • appendix 1-1, 1-2, 1-3, 1-4
  • appendix 2-1, 2-2, 2-3
  • appendix 3-1, 3-2, 3-3, 3-4, 3-5, 3-6, 3-7, 3-8
    
    
• A Molecular Phylogenetic Study of the Palmae (Arecaceae) Based on atpB, rbcL, and 18S nrDNA Sequences – William J. Hahn.
  
  
• Phylogeny of the Lake Tanganyika Cichlid Species Flock and Its Relationship to the Central and East African Haplochromine Cichlid Fish Faunas – Walter Salzburger, Axel Meyer, Sanja Baric, Erik Verheyen, and Christian Sturmbauer.
  
  
• Building Supertrees: An Empirical Assessment Using the Grass Family (Poaceae) – Nicolas Salamin, Trevor R. Hodkinson, and Vincent Savolainen.
  

POINTS OF VIEW

• Matrix Representation with Parsimony, Taxonomic Congruence, and Total Evidence – Davide Pisani and Mark Wilkinson.
  
  
• Geographic Origin of Human Mitochondrial DNA: Accommodating Phylogenetic Uncertainty and Model Comparison – John P. Huelsenbeck and Nikita S. Imennov.
  
  
• Comparing the Gap Excess Ratio and the Retention Index of the Stratigraphic Character – John A. Finarelli and William C. Clyde.
  
  
• A Character-Based Method for Measuring the Fit of a Cladogram to the Fossil Record – Kenneth D. Angielczyk.

BOOK REVIEW

• Interrelationships of the Platyhelminthes – D. T. Littlewood and R. A. Bray.