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Phylogeny and taxonomy of Halimeda incrassata, including descriptions of H. kanaloana and H. heteromorpha spp. nov (Bryopsidales, Chlorophyta)
Verbruggen, H.; De Clerck, O.; N'Yeurt, A.D.R.; Spalding, H.; Vroom, P.S. (2006). Phylogeny and taxonomy of Halimeda incrassata, including descriptions of H. kanaloana and H. heteromorpha spp. nov (Bryopsidales, Chlorophyta). Eur. J. Phycol. 41(3): 337-362. dx.doi.org/10.1080/09670260600709315
In: European Journal of Phycology. Cambridge University Press/Taylor & Francis: Cambridge. ISSN 0967-0262; e-ISSN 1469-4433, more
Peer reviewed article  
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Keywords
    Halimeda heteromorpha N'Yeurt, 2006 [WoRMS]; Halimeda incrassata (J.Ellis) J.V.Lamouroux, 1816 [WoRMS]; Halimeda kanaloana Vroom, 2006 [WoRMS]; Halimeda melanesica Valet, 1966 [WoRMS]
Author keywords
    anatomy, Halimeda incrassata , H. heteromorpha , H. kanaloana , H. melanesica , morphology, phylogeny, taxonomy
Authors  Top 
  • Verbruggen, H., more
  • De Clerck, O., more
  • N'Yeurt, A.D.R.
  • Spalding, H.
  • Vroom, P.S.
Abstract
    The tropical green algal genus Halimeda is one of the best studied examples of pseudo-cryptic diversity within the algae. Previous molecular and morphometric studies revealed that within Halimeda section Rhipsalis, Halimeda incrassata included three pseudo-cryptic entities and that the morphological boundaries between H. incrassata and Halimeda melanesica were ill-defined. In this paper, the taxonomy of H. incrassata is revised: two pseudo-cryptic entities are described as new species, Halimeda kanaloana and Halimeda heteromorpha, while H. incrassata is redefined to encompass a single, monophyletic entity. Similarities and differences between the three species and H. melanesica are discussed. Monophyly of H. heteromorpha, which was questioned in a former study, is reinvestigated using sets of 32 ITS1-ITS2 and 21 plastid rps3 sequences and various alignment and inference methods. The phylogenetic relationships within Halimeda section Rhipsalis are inferred from nuclear 18S-ITS1-5.8S-ITS2 and concatenated plastid sequences (tufA & rpl5-rps8-infA) and interpreted in a biogeographic context.
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