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Citation for Study 1578

About Citation title: "A revised classification of the Dictyoteae (Dictyotales, Phaeophyceae) based on rbcL and 26S ribosomal DNA sequence analyses".
About This study was previously identified under the legacy study ID S1523 (Status: Published).

Citation

De clerck O., Leliaert F., Verbruggen H., Lane C., Paula J., Payo D., & Coppejans E. 2006. A revised classification of the Dictyoteae (Dictyotales, Phaeophyceae) based on rbcL and 26S ribosomal DNA sequence analyses. Journal of Phycology, null.

Authors

  • De clerck O.
  • Leliaert F.
  • Verbruggen H.
  • Lane C.
  • Paula J.
  • Payo D.
  • Coppejans E.

Abstract

Dictyota is a genus of tropical to warm temperate brown algae characterized by parenchymatous, flattened thalli that grow by a single, transversely oriented apical cell. Dictyota is currently distinguished from allied genera of the tribe Dictyoteae (Dilophus, Glossophora, Glossophorella and Pachydictyon) by the structure of the cortical and medullary layers, as well as the relative abundance of surface proliferations. Even though the traditional classification of the Dictyoteae has repeatedly been criticized in the past, the absence of sound molecular data has so far discouraged any new taxonomic proposals apart from a merger of Dilophus with Dictyota which has been accepted by only part of the phycological community. Phylogenetic analysis of rbcL, partial 26S rDNA sequence and combined data sets, including four out of five generitypes, demonstrates that the traditional classification does not accurately reflect its evolutionary history. None of the genera is resolved as a monophyletic clade. Hence, a merger of Glossophora, Glossophorella and Pachydictyon in Dictyota is proposed. Two new genera, Canistrocarpus (incorporating Dictyota cervicornis, D. crispata and D. magneana) and Rugulopteryx (accommodating Dictyota radicans, Dil. suhrii and Dil. marginatus), are described. Both genera are supported by molecular indications and a combination of reproductive and vegetative characters. The position of Dilophus fastigiatus as a clade sister to Dictyota s.l. and the absence of Dil. gunnianus, the generitype of Dilophus, from the analyses, prevented us from making a more definite statement on the status of the latter genus.

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  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S1578
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