Abstract
The traditional phylogeny of the coral-inhabiting barnacles, the Pyrgomatidae, is based on morphological characteristics, mainly of the hard parts. It has been difficult to establish the phylogenetic relationships among Pyrgomatidae because of the apparent convergence of morphological characteristics, and due to the use of non-cladistic systematics, which emphasize ancestor-descendant relationships rather than sister-clade relationships. We used partial sequences of two mithochondrial genes, 12S rDNA and 16S rDNA, and a nuclear gene, 18S rDNA, to infer the molecular phylogeny of the pyrgomatids. Our phylogenetic results allowed us to reject previous classifications of Pyrgomatidae based on morphological characteristics. Our results also suggested the possibility of paraphyly of the Pyrgomatidae. The hydrocoral barnacle Wanella is not found on the same clade as the other pyrgomatids, but rather, with the free-living balanids. The basal position of Megatrema and Ceratoconcha is supported. The archeaobalanid Armatobalanus is grouped with Cantellius at the base of the Indo-Pacific pyrgomatines. Fusion of the shell plate and modification of the opercular valves are homoplasious features that occurred more than three times on different clades. The monophyly of the "Savignium" group, comprising four nominal genera, is also not supported, and the different taxa are placed on different clades.
Original language | English |
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Pages (from-to) | 1333-1341 |
Number of pages | 9 |
Journal | Molecular Phylogenetics and Evolution |
Volume | 44 |
Issue number | 3 |
DOIs | |
State | Published - Sep 2007 |
Bibliographical note
Funding Information:This study was supported by the Israel Science Foundation (ISF) (Grant No. 430/03-3). We acknowledge Mr. Assi Arbiv of ASEA Holon, Israel, for help in obtaining coral barnacles used in this study. Dr. Itzhak Brickner and Dr. Sarit Karako-Lampert helped us with sample collection. The material from Thailand was obtained with the help of Dr. Niphon Phangsuwan from the Phuket Marine Biological Centre. We thank the Interuniversity Institute for Marine Studies in Eilat for assistance and use of its facilities. Dr. G. Kolbasov helped with the identification of Armatobalanus. We thank Prof. W.A. Newman of The Scripps Institution of Oceanography for critical reading and comments on the manuscript. We are indebted to the anonymous reviewers for valuable suggestions and remarks.
Funding
This study was supported by the Israel Science Foundation (ISF) (Grant No. 430/03-3). We acknowledge Mr. Assi Arbiv of ASEA Holon, Israel, for help in obtaining coral barnacles used in this study. Dr. Itzhak Brickner and Dr. Sarit Karako-Lampert helped us with sample collection. The material from Thailand was obtained with the help of Dr. Niphon Phangsuwan from the Phuket Marine Biological Centre. We thank the Interuniversity Institute for Marine Studies in Eilat for assistance and use of its facilities. Dr. G. Kolbasov helped with the identification of Armatobalanus. We thank Prof. W.A. Newman of The Scripps Institution of Oceanography for critical reading and comments on the manuscript. We are indebted to the anonymous reviewers for valuable suggestions and remarks.
Funders | Funder number |
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Israel Science Foundation | 430/03-3 |
Keywords
- 12S rDNA
- 16S rDNA
- 18S rDNA
- Coral-inhabiting barnacles
- Phylogeny
- Pyrgomatidae