Journal
MOLECULAR PHYLOGENETICS AND EVOLUTION
Volume 34, Issue 1, Pages 167-180Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2004.08.017
Keywords
Boinae; snakes; Boa constrictor; cytochrome b; morphology; maximum likelihood; Bayesian inference; partitioned; priors; parametric bootstraps
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Snakes of the subfamily Boinae are found in Madagascar, the Papuan-Pacific Islands, and the Neotropics. It has been suggested that genera within each of these particular areas do not form monophyletic groups. Further, it was proposed that the New World Boa constrictor is more closely related to boine genera in Madagascar than to boines in the Neotropics. Along with inferring the relationship of all boine genera using data from the cytochrome b gene and morphology, the placement of Boa was also examined. Phylogenetic inferences using maximum likelihood and Bayesian (BI) methods for combined data analyses and separate analyses of DNA sequence and morphological data were conducted. Priors, parametric bootstraps, and the Shimodaira-Hasegawa test were used to examine the previously proposed placement of Boa with Madagascan taxa using these DNA data. DNA data and combined data analyses strongly reject the hypothesis that Boa is more closely related to Old World genera than to other New World genera. Additionally, strong tree support suggests that all species within Madagascar, the Papuan-Pacific Islands, and the Neotropics each form a monophyletic group with respect to their geographic region. (C) 2004 Elsevier Inc. All rights reserved.
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