Bromeliad predator phylogeny

2016-10-04T14:04:49Z (GMT) by Andrew MacDonald
This Newick tree contains data on the evolutionary relationships and divergence times, based on published phylogenies.<br><br>We included phylogenetic information in our analyses of all three datasets. We obtained this phylogenetic information first from classification alone. Next we added information about the age of each node from <a href="http://timetree.org">timetree.org</a>, an online database of published molecular time estimates. The timetree online database collects information from multiple independent phylogenetic studies. These studies provide independent estimates of the age of the most recent common ancestor for two lineages. Lineages that diverged a long time ago have been dated by multiple studies; for such nodes we used the median age. All internal nodes were dated by at least one study, however data was unavailable for the youngest nodes (i.e. tips) of the tree. For these nodes, either a lack of taxonomic information (e.g. Tabanidae) or a lack of phylogenetic study (e.g. <em>Leptagrion</em>) prevented more information from being included. These branches were left unresolved (i.e., as polytomies) and were all assigned identical, arbitrary and short branch lengths (15 Mya). The result is a phylogeny that closely resembles the qualitative, taxonomy-based tree with which we began. Because the node ages between our major predators (leeches, tabanids and odonata) are so deep, variation among studies in the estimated age of these nodes was minor compared to the differences between them.<div> <div>​I obtained these estimates from Timetree.org in July 2013<br></div></div>