Abstract
The phylogeny of ligulate and sulfuric-acid containing species of Desmarestia, occurring worldwide from polar to temperate regions, was revised using a multigenic and polyphasic approach. Sequence data, gametophyte characteristics, and sporophyte morphology support reducing a total of 16 taxa to four different species. (1) D.herbacea, containing broad-bladed and highly branched forms, has dioecious gametophytes. The three other species have monoecious gametophytes: (2) D.ligulata which is profusely branched and, except for one subspecies, narrow-bladed, (3) Japanese ligulate Desmarestia, here described as D.japonica sp. nov., which is morphologically similar to D.ligulata but genetically distant from all other ligulate taxa. This species may have conserved the morphology of original ligulate Desmarestia. (4) D.dudresnayi, including unbranched or little branched broad-bladed taxa. A figure of the holotype of D.dudresnayi, which was lost for decades, was relocated. The taxonomy is complemented by a comparison of internal transcribed spacer and cytochrome c oxidase subunit I (cox1) as potential barcode loci, with cox1 offering good resolution, reflecting species delimitations within the genus Desmarestia.
Original language | English |
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Pages (from-to) | 149-166 |
Number of pages | 18 |
Journal | Journal of Phycology |
Volume | 50 |
Issue number | 1 |
Early online date | 27 Jan 2014 |
DOIs | |
Publication status | Published - Feb 2014 |
Bibliographical note
Funded byKorea Research Foundation
UK Natural Environment Research Council
Molecular Bioanalytics Facility. Grant Number: MGF-154
Natural Environment Research Council. Grant Number: 2025 NF3
German Academic Merit Foundation
European Commission
The Marine Alliance for Science and Technology for Scotland
Scottish Funding Council. Grant Number: HR09011
Keywords
- brown algae
- cox1
- desmarestia
- DNA barcoding
- multigene phylogeny
- phaeophyceae
- psaA
- rbcL
- SSU-ITS
- sulfuric acid
- life-history
- brown-algae
- temperature tolerance
- maximum-likelihood
- sulfuric-acid
- morphology
- phylogeny
- taxonomy
- seaweeds
- origin