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Systematic revision of the widespread species Sarcodia ceylanica (Sarcodiaceae, Rhodophyta) in the Indo-Pacific Oceans, including S. suiae sp. nov.
Rodríguez-Prieto, C.; De Clerck, O.; Kitayama, T.; Lin, S.-M. (2017). Systematic revision of the widespread species Sarcodia ceylanica (Sarcodiaceae, Rhodophyta) in the Indo-Pacific Oceans, including S. suiae sp. nov.. Phycologia 56(1): 63-76. https://dx.doi.org/10.2216/16-31
In: Phycologia. International Phycological Society: Odense. ISSN 0031-8884; e-ISSN 2330-2968
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| Trefwoorden |
Rhodophyta [WoRMS]; Sarcodia ceylanica Harvey ex Kützing, 1869 [WoRMS]; Sarcodia suiae; Sarcodiaceae Kylin, 1932 [WoRMS]
Marien/Kust |
| Author keywords |
Indo-Pacific Oceans; Molecular phylogeny; Rhodophyta; Sarcodiaceae;Sarcodia ceylanica; Sarcodia suiae sp nov.; Taiwan; Taxonomy |
| Auteurs | | Top |
- Rodríguez-Prieto, C.
- De Clerck, O.
- Kitayama, T.
- Lin, S.-M.
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| Abstract |
The marine red algal genus Sarcodia possesses single to several flattened blades, composed of a central layer of medullary filaments, with some stellate cells remaining, flanked by two layers of subspherical to stellate cortical cells. Among the described species, S. ceylanica, previously regarded as a synonym of S. montagneana, is characterised by erect thalli composed of subdichotomously branched blades and has been widely reported from the Indian and western Pacific Oceans. Collections from various localities in the Indo-Pacific regions included many specimens fitting this broad concept of S. ceylanica but differed in blade morphology and were difficult to assign to any named species with confidence. In order to delineate the species boundaries within the suite of the specimens that morphologically resemble S. ceylanica and to clarify the phylogenetic significance of the morphological features used for separating species of Sarcodia, we used rbcL sequences to infer phylogenetic relationships among the available specimens. RbcL sequence analyses showed that the distribution of S. ceylanica is most likely restricted to its type locality Sri Lanka. The collections of S. ‘ceylanica' analysed from Taiwan, Japan and Kenya were split into four clades and were genetically different from those collections of S. ceylanica from Sri Lanka. The molecular results also suggested that S. montagneana is distributed only in New Zealand. In addition, one new species, S. suiae S.-M. Lin & Rodríguez-Prieto, is described to accommodate specimens of S. ‘ceylanica' from Taiwan. Records of S. ‘ceylanica' and S. ‘montagneana’ from other locations in the Indo-Pacific regions should be regarded as doubtful until detailed morphological studies and molecular analyses of freshly collected specimens become available. |
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