3 Works

Data from: Character Analysis in Morphological Phylogenetics: Problems and Solutions

John J. Wiens
Many aspects of morphological phylogenetics are controversial in the theoretical systematics literature and yet are often poorly explained and justified in empirical studies. In this paper, I argue that most morphological characters describe variation that is fundamentally quantitative, regardless of whether it is coded qualitatively or quantitatively by systematists. Given this view, three fundamental problems in morphological character analysis (character state definition, delimitation, and ordering) may have a common solution: coding morphological characters as continuous...

Data from: Delimiting Species Using DNA and Morphological Variation and Discordant Species Limits in Spiny Lizards (Sceloporus)

John J. Wiens & Tonya A. Penkrot
Haplotype phylogenies based on DNA sequence data are increasingly being used to test traditional species-level taxonomies based on morphology. However, few studies have critically compared species limits based on morphological and DNA data, and the methods used to delimit species using either type of data are only rarely explained. In this paper, we review three approaches for species delimitation (tree-based with DNA data and tree-based and character-based with morphological data) and propose explicit protocols for...

Data from: Testing Phylogenetic Methods with Tree Congruence: Phylogenetic Analysis of Polymorphic Morphological Characters in Phrynosomatid Lizards

John J. Wiens
Congruence between trees from separately analyzed data sets is a powerful approach for assessing the performance of phylogenetic methods but has been applied primarily to the analysis of molecular data. In this study, different methods for treating polymorphic characters were compared using morphological data from phrynosomatid lizards. Clades were identified that are both traditionally recognized and supported by recent molecular analyses, and species were sampled from these clades to make three RknownS phylogenies of eight...

Registration Year

  • 2010

Resource Types

  • Dataset


  • Carnegie Museum of Natural History
  • University of Pittsburgh