Morphological convergence characterizes the evolution of Xanthophyceae (Heterokontophyta): evidence from nuclear SSU rDNA and plastidial rbcL genes.

@article{Negrisolo2004MorphologicalCC,
  title={Morphological convergence characterizes the evolution of Xanthophyceae (Heterokontophyta): evidence from nuclear SSU rDNA and plastidial rbcL genes.},
  author={Enrico Negrisolo and Silvia Maistro and Matteo Incarbone and Isabella Moro and Luisa Dalla Valle and Paul A. Broady and Carlo Andreoli},
  journal={Molecular phylogenetics and evolution},
  year={2004},
  volume={33 1},
  pages={
          156-70
        }
}
Congruence of chloroplast- and nuclear-encoded DNA sequence variations used to assess species boundaries in the soil microalga Heterococcus (Stramenopiles, Xanthophyceae)
TLDR
A method and a reference data base is established for the unambiguous identification of species of the common soil microalgal genus Heterococcus which uses DNA sequence variation in markers from plastid and nuclear genomes and is more reliable and more conservative than morphological data.
Molecular phylogeny of the genus Tribonema (Xanthophyceae) using rbcL gene sequence data: monophyly of morphologically simple algal species
TLDR
The data suggest that presently identified morpho-species of Tribonema may not be useful as evolutionary units or in biodiversity assessment of freshwater ecosystems.
Assessing phylogenetic delineations of taxa of filamentous Xanthophyceae (Stramenopiles) using DNA sequence analyses and morphology
TLDR
To test genus and species boundaries within filamentous Xanthophyceae exhibiting bipartite cell walls (Tribonemataceae), the plastid-encoded psbA/rbcL spacer region and full rbcL sequences were determined for 34 strains and revealed that strains previously assigned to a single genus based on morphology were split into seven distinct sequence similarity groups which are proposed to represent genera.
Seven gene phylogeny of heterokonts.
Testing for endemism, genotypic diversity and species concepts in Antarctic terrestrial microalgae of the Tribonemataceae (Stramenopiles, Xanthophyceae).
TLDR
The presence of distinctive sequence regions within the psbA/rbcL spacer, together with differences in the rbcL phylogeny, provided significant autoapomorphic criteria to re-define the Tribonemataceae species.
Cylindrotheca closterium Is a Species Complex as Was Evidenced by the Variations of rbcL Gene and SSU rDNA
TLDR
Interestingly, very high sequence divergences of SSU rDNA and rbcL gene were found among these isolates, and the existence of cryptic species within C. closterium was suggested.
Species distinctions among closely related strains of Eustigmatophyceae (Stramenopiles) emphasizing ITS2 sequence-structure data: Eustigmatos and Vischeria
TLDR
Monophyly of the species was supported by shared ITS2 secondary structure features, making them distinct from other eustigmatophyte lineages in concordance with phylogenetic analyses, and ITS2 as a promising marker for a DNA metabarcoding approach (culture-independent biodiversity assessment) is recommended.
A Molecular Genetic Timescale for the Diversification of Autotrophic Stramenopiles (Ochrophyta): Substantive Underestimation of Putative Fossil Ages
TLDR
The evolutionary timescale of the autotrophic stramenopiles reconstructed here is generally older than previously inferred from molecular clocks, which casts serious doubt on the taxonomic validity of putative xanthophyte/phaeophyte fossils from the Proterozoic, which predate by as much as a half billion years or more the age suggested by the molecular genetic data.
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