Independent adaptation to riverine habitats allowed survival of ancient cetacean lineages
Open Access
- 10 October 2000
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 97 (21) , 11343-11347
- https://doi.org/10.1073/pnas.97.21.11343
Abstract
The four species of "river dolphins" are associated with six separate great river systems on three subcontinents and have been grouped for more than a century into a single taxon based on their similar appearance. However, several morphologists recently questioned the monophyly of that group. By using phylogenetic analyses of nucleotide sequences from three mitochondrial and two nuclear genes, we demonstrate with statistical significance that extant river dolphins are not monophyletic and suggest that they are relict species whose adaptation to riverine habitats incidentally insured their survival against major environmental changes in the marine ecosystem or the emergence of Delphinidae.Keywords
This publication has 25 references indexed in Scilit:
- Evidence on Mammalian Phylogeny from Sequences of Exon 28 of the von Willebrand Factor GeneMolecular Phylogenetics and Evolution, 1996
- Cytochrome b nucleotide sequences and the identification of five primary lineages of extant cetaceansMolecular Biology and Evolution, 1996
- TESTING SIGNIFICANCE OF INCONGRUENCECladistics, 1994
- THE EVOLUTIONARY HISTORY OF WHALES AND DOLPHINSAnnual Review of Earth and Planetary Sciences, 1994
- Alignment-Ambiguous Nucleotide Sites and the Exclusion of Systematic DataMolecular Phylogenetics and Evolution, 1993
- Evaluation of the maximum likelihood estimate of the evolutionary tree topologies from DNA sequence data, and the branching order in hominoideaJournal of Molecular Evolution, 1989
- STATUS OF STUDIES ON FOSSIL MARINE MAMMALSMarine Mammal Science, 1985
- Macroevolution: Large-scale replacements in the history of lifeNature, 1983
- The History of Whales-Their Adaptation to Life in the WaterThe Quarterly Review of Biology, 1928
- IV. Description of the Skeleton of Inia geoffrensis and of the Skull of Pontoporia blainvillii, with Remarks on the Systematic Position of these Animals in the Order Cetacea.The Transactions of the Zoological Society of London, 1867