The marine macroalgae of Cabo Verde archipelago : an updated checklist

An updated list of the names of the marine macroalgae of Cabo Verde, an archipelago of ten volcanic islands in the central Atlantic Ocean, is presented based on existing reports, and includes the addition of 36 species. The checklist comprises a total of 372 species names, of which 68 are brown algae (Ochrophyta), 238 are red algae (Rhodophyta) and 66 green algae (Chlorophyta). New distribution records reveal the existence of 10 putative endemic species for Cabo Verde islands, nine species that are geographically restricted to the Macaronesia, five species that are restricted to Cabo Verde islands and the nearby Tropical Western African coast, and five species known to occur only in the Maraconesian Islands and Tropical West Africa. Two species, previously considered invalid names, are here validly published as Colaconema naumannii comb. nov. and Sebdenia canariensis sp. nov.The present work was generated in the context of the Project PADDLE - Planning in the liquid world with tropical stakes, funded by the European Union’s Horizon 2020 Research and Innovation Programme under Grant 734271. DG was supported with the FCT postdoctoral grant SFRH/BPD/64963/2009. CIBIO-Açores is maintained with Portuguese (UID/BIA/50027/2013) and Azorean (POCI-01-0145-FEDER-006821) funding.info:eu-repo/semantics/publishedVersio

Biogeographic and Phylogenetic Investigations of the Pantropical Genus Sargassum (Fucales, Phaetophyceae) with Respect to Gulf of Mexico Species

The genus Sargassum, despite considerable research efforts, is still one of the most systematically complex and problematic genera of the brown algae. In order to evaluate the adequacy of sectional to series level designations in the tropical subgenus, an ambitious effort was begun that will eventually include all of the east Isthmian species in a global phylogenetic analysis for the genus. This research effort is based on extensive seasonal field survey work and molecular-based parsimony analysis (chloroplast encoded ribulose-I, 5-bisphosphate carboxylase spacer region) of collected voucher specimens. The present analysis indicates that the Gulf/Caribbean species do not cluster as they are traditionally classified but form a strongly supported clade representing a single biogeographic unit in the Malococarpicae section of the subgenus Sargassum. Four of these species share an insertion/ deletion event with some of the Pacific species, suggesting a shared evolutionary history between the two ocean basins

Observations on the Macroalgae Inhabiting Deep-Water Hard Bank Communities in the Northwestern Gulf of Mexico

A preliminary species list of subtidal macroalgal collections from established monitoring sites on two midshelf hard banks communities in the northwestern Gulf of Mexico is provided. A total of 50 taxa belonging to the green (Chlorophyta), brown (Phaeophyceae), and red (Rhodophyta) algae were identified, providing the first documentation of algal composition at Stetson Bank, TX, and Sonnier Bank, LA. Both sites are much more species rich and taxonomically distinct than previously reported, with a surprisingly different floristic composition between both. New records for the Gulf of Mexico include Laurencia chondrioides, Callithamniella tingitana, Diplothamnion jolyi, Griffithsia heteromorpha, and Dictyota pfaffii. Northernmost range extensions for four taxa are reported for the northwestern Gulf

Platoma chrysymenioides sp. nov. (Schizymeniaceae), and Sebdenia integra sp. nov. (Sebdeniaceae), Two New Red Algal Species from the Northwestern Gulf of Mexico, with a Phylogenetic Assessment of the Cryptonemiales Complex (Rhodophyta)

Recent collecting cruises conducted in the Northwestern Gulf of Mexico at 40- to 90-m depth revealed a diverse deepwater flora that is dominated by members of the Cryptonemiales complex. In this article, we describe two species new to science, Platoma chrysymenioides sp. nov. (Schizymeniaceae) and Sebdenia integra sp. nov. (Sebdeniaceae). Chloroplast-encoded rbcL sequence analyses corroborate morphological and nuclear small subunit ribosomal RNA gene data that the red algal orders Cryptonemiales and Rhodymeniales are closely related. The allied order Nemastomatales is strongly supported to include the Nemastomataceae and Schizymeniaceae, but the phylogenetic position of the Sebdeniaceae and Tsengiaceae remains equivocal. The Cryptonemiales, Rhodymeniales, Nemastomatales, Sebdeniaceae, and Tsengiaceae form a well-supported monophyletic assemblage—the Cryptonemiales complex—within the Rhodophyta

The correct identification of the species going under the name Scizymenia dubyi (Schizymeniaceae, Rhodophyta) in the Azores, based on molecular and morphological evidences.

The 62nd Annual Meeting of the Phycological Society of America. New Orleans, Louisiana, EUA, 27-30 de Julho de 2008

The red algal genus Scinaia (Nemaliales; Rhodophyta) on the Azores Archipelago: a molecular approach with morphological and anatomical observations.

43rd European Marine Biology Symposium. Ponta Delgada, Açores, 8-12 de Setembro de 2008

The crustose red algal genus Peyssonnelia (Peyssonneliales, Rhodophyta) in the Azores : from five to one species

The family Peyssonneliaceae comprises a worldwide group of non-calcified to calcified, crust-forming red algae of great ecological significance. Of the genera currently recognized in the family, Peyssonnelia has been widely considered to contain the largest number of species, with five members reported for the Azores. Using rbcL as a molecular marker, we here report on the taxonomic identity of recent collections of Peyssonneliaceae from the Azorean islands of São Miguel, Graciosa and Pico, and compare those specimens in a worldwide context. Only a single Peyssonnelia species, P. squamaria, is confirmed for the Azorean archipelago, with three different haplotypes. Although the populations in the Azores are genetically different from those occurring in the Mediterranean, this separation appears to be relatively recent

New Insights into the Genus Lithophyllum (Lithophylloideae, Corallinaceae, Corallinales) from Deepwater Rhodolith Beds Offshore the NW Gulf of Mexico

Hard bank rhodolith beds at 45–80 m depth offshore Louisiana in the Northwestern Gulf of Mexico harbor a diverse community of non-geniculate coralline algae spanning multiple lineages including both rhodolith-forming (biogenic) taxa and others encrusting autogenic rhodoliths. Identifying these members of the Corallinales to the correct genus and species is an ongoing process because many available names need to be validated by comparison to historical type specimens. A phylogenetic analysis of concatenated plastid (psbA), nuclear (LSU rDNA), and mitochondrial (COI) DNA sequences of non-geniculate corallines belonging to the subfamily Lithophylloideae (Corallinaceae), including newly generated sequences from recently collected specimens dredged at Ewing and Sackett Banks following the April 2010 Deepwater Horizon oil spill, reveals at least two distinct species of Lithophyllum sensu lato for the region. Scanning Electron Microscopy confirmed the presence of vegetative characters congruent with those for both Lithophyllum and Titanoderma. Lithophyllum is a newly reported genus for the northern Gulf of Mexico. The generic boundaries within the Lithophylloideae are addressed in light of possible evolutionary progenetic heterochrony that may have occurred within this subfamil

Molecular and Morphological Diversity of Lithothamnion spp. (Hapalidiales, Rhodophyta) from Deepwater Rhodolith Beds in the Northwestern Gulf of Mexico

In the Northwestern Gulf of Mexico (NWGMx), subtidal rhodolith beds offshore Louisiana at 45–80 m depth harbor a diverse community of uncharacterized non-geniculate coralline algae including both biogenic and autogenic rhodoliths and other encrusting taxa. Identifying specimens to their correct genus and species is an ongoing process because many available names remain to be validated by comparison to type specimens. Here, comparative DNA sequencing ( psb A, UPA, and COI) and scanning electron microscopy (SEM) are used to assess the molecular and morphological diversity of the rhodolith-forming specimens belonging to the generic concept of Lithothamnion . Phylogenetic and species delimitation analyses of the newly generated sequences from recently dredged specimens at Ewing and Sackett Banks offshore Louisiana reveal the presence of at least six species of Lithothamnion , whose generic placement is confirmed by SEM images of features considered characteristic for the genus. More broadly, our analyses indicate at least eight Lithothamnion species are found in the Gulf of Mexico. Phylogenetic analyses of single ( psb A and COI) and concatenated markers ( psb A, COI and UPA) show that Lithothamnion is polyphyletic