S. Fredericq

Publications166
h-index36
Citations5,473
Highly Influential Citations382
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The New Higher Level Classification of Eukaryotes with Emphasis on the Taxonomy of Protists
TLDR
This revision of the classification of unicellular eukaryotes updates that of Levine et al. (1980) for the protozoa and expands it to include other protists, and proposes a scheme that is based on nameless ranked systematics.
Grateloupia turuturu (Halymeniaceae, Rhodophyta) is the correct name of the non-native species in the Atlantic known as Grateloupia doryphora
TLDR
Evidence from comparative rbcL sequence analysis and morphology suggests that this adventive species in the NE and NW Atlantic corresponds with G. turuturu Yamada, originally described from Japan, which follows a well-recognized trend of invasive marine organisms that have colonized the Atlantic Ocean and Mediterranean Sea from Pacific NE Asia.
SYSTEMATICS OF THE GRACILARIACEAE (GRACILARIALES, RHODOPHYTA): A CRITICAL ASSESSMENT BASED ON RBCL SEQUENCE ANALYSES 1
Generic concepts in the economically important agarophyte red algal family Gracilariaceae were evaluated based on maximum parsimony, Bayesian likelihood, and minimum evolution analyses of the…
A gene phylogeny of the red algae (Rhodophyta) based on plastid rbcL.
A phylogeny for the Rhodophyta has been inferred by parsimony analysis of plastid rbcL sequences representing 81 species, 68 genera, 38 families, and 17 orders of red algae; rbcL encodes the large…
A MOLECULAR PHYLOGENY OF THE GELIDIALES (RHODOPHYTA) BASED ON ANALYSIS OF PLASTID rbcL NUCLEOTIDE SEQUENCES1
TLDR
RbcL sequences from red algae provide a large number of informative characters for phylogenetic analysis, yet the absence of insertion/deletion mutations allows for the unambiguous alignment of sequences, calling for a revision of the classification of the Gelidiales.
SYSTEMATICS OF GRACILARIOPSIS (GRACILARIALES, RHODOPHYTA) BASED ON rbcL SEQUENCE ANALYSES AND MORPHOLOGICAL EVIDENCE 1
A phylogeny has been inferred from parsimony and likelihood analyses of plastid rbcL DNA sequences for seven recognized and six undescribed species of Gracilariopsis (Gp.) (Gracilariales,…
Divergence time estimates and the evolution of major lineages in the florideophyte red algae
TLDR
This research provides robust estimates for the divergence times of major lineages within the Florideophyceae and interprets the emergence of key morphological innovations that characterize these multicellular red algae.
GRACILARIA VERMICULOPHYLLA (RHODOPHYTA, GRACILARIALES) IN HOG ISLAND BAY, VIRGINIA: A CRYPTIC ALIEN AND INVASIVE MACROALGA AND TAXONOMIC CORRECTION 1
TLDR
It is document that the cylindrical form that dominates Hog Island Bay, Virginia, is G. vermiculophylla (Ohmi) Papenfuss, an alien macroalga from the West Pacific that is successful in turbid coastal lagoons.
Phylogenetic Systematics and Biogeography of the Gigartinaceae (Gigartinales, Rhodophyta) Based on Sequence Analysis of rbcL
TLDR
The topology of the rbcL tree, which contains 43 species, generally supports the recent systematic revision of the Gigartinaceae, while highlighting some taxonomic problems.
SYSTEMATICS OF GRATELOUPIA FILICINA (HALYMENIACEAE, RHODOPHYTA), BASED ON rbcL SEQUENCE ANALYSES AND MORPHOLOGICAL EVIDENCE, INCLUDING THE REINSTATEMENT OF G. MINIMA AND THE DESCRIPTION OF G.…
TLDR
Morphological and anatomical characters were put forward that support the distinctiveness of these three distinct species, whereby the presence of genuine G. filicina is limited to the Mediterranean basin and G. luxurians is elevated to species status.
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