Estimation of divergence times in cnidarian evolution based on mitochondrial protein-coding genes and the fossil record
- Title
- Estimation of divergence times in cnidarian evolution based on mitochondrial protein-coding genes and the fossil record
- Author
- 이재성
- Keywords
- Cnidaria; Hexacorallia; Octocorallia; Medusozoa; Divergence times; Mitochondrial genome
- Issue Date
- 2012-02
- Publisher
- Elsevier Science
- Citation
- Molecular Phylogenetics and Evolution, 2012, 62(1), P.329-345
- Abstract
- The phylum Cnidaria is comprised of remarkably diverse and ecologically significant taxa, such as the reef-forming corals, and occupies a basal position in metazoan evolution. The origin of this phylum and the most recent common ancestors (MRCAs) of its modern classes remain mostly unknown, although scattered fossil evidence provides some insights on this topic. Here, we investigate the molecular divergence times of the major taxonomic groups of Cnidaria (27 Hexacorallia, 16 Octocorallia, and 5 Medusozoa) on the basis of mitochondrial DNA sequences of 13 protein-coding genes. For this analysis, the complete mitochondrial genomes of seven octocoral and two scyphozoan species were newly sequenced and combined with all available mitogenomic data from GenBank. Five reliable fossil dates were used to calibrate the Bayesian estimates of divergence times. The molecular evidence suggests that cnidarians originated 741 million years ago (Ma) (95% credible region of 686-819), and the major taxa diversified prior to the Cambrian (543 Ma). The Octocorallia and Scleractinia may have originated from radiations of survivors of the Permian-Triassic mass extinction, which matches their fossil record well.
- URI
- https://www.sciencedirect.com/science/article/pii/S1055790311004374?via%3Dihub
- ISSN
- 1055-7903; 1095-9513
- DOI
- 10.1016/j.ympev.2011.10.008
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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