Ecological diversification and phylogeny of emydid turtles

摘要: Ecological diversification is a central topic in ecology and evolutionary biology. We undertook the first comprehensive species-level phylogenetic analysis of Emydidae (an ecologically diverse group turtles), used resulting phy- logeny to test four general hypotheses about ecological diversification. Phylogenetic analyses were based on data from morphology (237 parsimony-informative characters) mitochondrial DNA sequences (547 parsimony-infor- mative included 39 40 currently recognized emydid species. Combined all pro- vide well-supported hypothesis for intergeneric relationships, support monophyly two subfamilies (Emydinae Deirochelyinae) most genera (with notable exception Clemmys Trachemys ). Habitat diet mapped onto combined-data tree fundamental Using continuous coding characters showed that lineages changed habitat before diet, change was frequently generalist specialist, rarely same branch phylogeny. However, we also demonstrate results ancestral trait reconstructions can be highly sen- sitive character method (i.e. vs. discrete). Finally, propose simple model describe pat- tern turtles other lineages, which may reconcile (seemingly) conflicting conclusions our study recent reviews © 2003 The Linnean Society London, Biological Journal , 2003, 79 577-610.