TreeBASE Search-Trees for study 1218

@ARTICLE{TreeBASE2Ref18052, author = {Philip S. Ward and Douglas A. Downie}, title = {The ant subfamily Pseudomyrmecinae (Hymenoptera: Formicidae): phylogeny and evolution of big-eyed arboreal ants}, year = {2004}, keywords = {}, doi = {}, url = {}, pmid = {}, journal = {Systematic Entomology}, volume = {}, number = {}, pages = {}, abstract = {The ant subfamily Pseudomyrmecinae comprises three genera of hyperoptic, arboreal ants, widely distributed in tropical and subtropical regions: Pseudomyrmex (~200 species, New World), Myrcidris (2 species, South America) and Tetraponera (~100 species, Paleotropics). The phylogenetic relationships among these ants were investigated using DNA sequence data (~5.2 kb from 18S rDNA, 28S rDNA, wingless, abdominal-A, and long-wavelength rhodopsin genes) and 144 morphological characters, both separately and in combination. Data were gathered from a representative set of 49 pseudomyrmecine species, plus 18 species from various outgroups. There is substantial agreement among the results obtained from different data sets, and from different methods of phylogenetic inference (parsimony, Bayesian inference). Monophyly of the following groups is strongly supported (100% bootstrap support and 1.00 posterior probability in the molecular data set): Pseudomyrmecinae, Pseudomyrmex, and Pseudomyrmex + Myrcidris. The status of the genus Tetraponera is less clear: one gene (wingless) indicates strongly that the genus is paraphyletic, while the 28S gene and morphology support monophyly of this taxon. Seven of nine Pseudomyrmex species groups, established previously on the basis of morphology alone, are strongly upheld, but monophyly is rejected for the P. pallens-group and the P. viduus-group. In the latter case molecular evidence indicates the existence of two independent clades, associated with the ant-plants Triplaris and Tachigali, respectively, whose convergent morphological features had caused them to be placed erroneously in the same species group. The present results confirm an earlier assertion that obligate associations with domatia-bearing plants have arisen at least 12 times in the subfamily. Molecular and morphological data support the hypothesis of a sister group relationship between Pseudomyrmecinae and Myrmeciinae (84% parsimony bootstrap, combined data set), which implies a Cretaceous origin of the stem-group pseudomyrmecines in the southern hemisphere. Pseudomyrmecines appear to have arisen in the Paleotropics and later dispersed from Africa to South America, where they experienced a pronounced burst of diversification.} }