%0 Journal Article %J Scientific Reports %D 2018 %T A novel species of the marine cyanobacterium Acaryochloris with a unique pigment content and lifestyle %A Partensky, Frédéric %A Six, Christophe %A Ratin, Morgane %A Garczarek, Laurence %A Vaulot, Daniel %A Probert, Ian %A Calteau, Alexandra %A Gourvil, Priscillia %A Marie, Dominique %A Grébert, Théophile %A Bouchier, Christiane %A Le Panse, Sophie %A Gachenot, Martin %A Rodríguez, Francisco %A Garrido, José L. %K RCC1774 %B Scientific Reports %V 8 %P 9142 %8 dec %G eng %U http://www.nature.com/articles/s41598-018-27542-7 %R 10.1038/s41598-018-27542-7 %0 Journal Article %J Protist %D 2017 %T Revision of the genus micromonas manton et parke (chlorophyta, mamiellophyceae), of the type species m. pusilla (butcher) manton & parke and of the species m. commoda van baren, bachy and worden and description of two new species based on the genetic %A Simon, Nathalie %A Foulon, Elodie %A Grulois, Daphne %A Six, Christophe %A Desdevises, Yves %A Latimier, Marie %A Le Gall, Florence %A Tragin, Margot %A Houdan, Aude %A Derelle, Evelyne %A Jouenne, Fabien %A Marie, Dominique %A Le Panse, Sophie %A Vaulot, Daniel %A Marin, Birger %K 2017 %K ASSEMBLE %K rcc %K RCC1109 %K RCC114 %K RCC2306 %K RCC2308 %K RCC299 %K RCC372 %K RCC373 %K RCC418 %K RCC434 %K RCC447 %K RCC448 %K RCC449 %K RCC450 %K RCC451 %K RCC461 %K RCC465 %K RCC472 %K RCC497 %K RCC498 %K RCC570 %K RCC629 %K RCC647 %K RCC658 %K RCC676 %K RCC692 %K RCC746 %K RCC803 %K RCC804 %K RCC805 %K RCC806 %K RCC807 %K RCC808 %K RCC828 %K RCC829 %K RCC830 %K RCC831 %K RCC833 %K RCC834 %K RCC835 %K RCC836 %K SBR$_\textrmP$hyto$_\textrmD$IPO %K SBR$_\textrmP$hyto$_\textrmP$PM %K sbr?hyto$_\textrmd$ipo %B Protist %V 168 %P 612–635 %8 nov %G eng %U http://linkinghub.elsevier.com/retrieve/pii/S1434461017300780 %R 10.1016/j.protis.2017.09.002 %0 Journal Article %J Protist %D 2014 %T Dinomyces arenysensis gen. et sp. nov. (rhizophydiales, dinomycetaceae fam. nov.), a chytrid infecting marine dinoflagellates %A Lepelletier, Frédéric %A Karpov, Sergey A %A Alacid, Elisabet %A Le Panse, Sophie %A Bigeard, Estelle %A Garcés, Esther %A Jeanthon, Christian %A Guillou, Laure %K 2014 %K chytrid %K Dinoflagellates %K Dinomyces arenysensis %K Fungi %K MACUMBA %K microbial parasitoids %K rcc %K RCC?o?dd %K Rhizophydiales. %K SBR$_\textrmP$hyto$_\textrmD$PO %K sbr?hyto$_\textrmd$ipo %K sbr?hyto?app %X Environmental 18S rRNA gene surveys of microbial eukaryotes have recently revealed the diversity of major parasitic agents in pelagic freshwater systems, consisting primarily of chytrid fungi. To date, only a few studies have reported the presence of chydrids in the marine environment and a limited number of marine chytrids have been properly identified and characterized. Here, we report the isolation and cultivation of a marine chytrid from samples taken during a bloom of the toxic dinoflagellate Alexandrium minutum in the Arenys de Mar harbour (Mediterranean Sea, Spain). Cross-infections using cultures and natural phytoplankton communities revealed that this chytrid is only able to infect certain species of dinoflagellates, with a rather wide host range but with a relative preference for Alexandrium species. Phylogenetic analyses showed that it belongs to the order Rhizophydiales, but cannot be included in any of the existing families within this order. Several ultrastructural characters confirmed the placement of this taxon within the Rhizophydiales as well its novelty notably in terms of zoospore structure. This marine chytridial parasitoid is described as a new genus and species, Dinomyces arenysensis, within the Dinomycetaceae fam. nov. %B Protist %V 165 %P 230–244 %G eng %U http://www.sciencedirect.com/science/article/pii/S1434461014000170 %R 10.1016/j.protis.2014.02.004 %0 Journal Article %J Harmful Algae %D 2014 %T Genetic diversity of the harmful family Kareniaceae (Gymnodiniales, Dinophyceae) in France, with the description of ¡i¿Karlodinium gentienii¡/i¿ sp. nov.: A new potentially toxic dinoflagellate %A Nézan, Elisabeth %A Siano, Raffaele %A Boulben, Sylviane %A Six, Christophe %A Bilien, Gwenael %A Chèze, Karine %A Duval, Audrey %A Le Panse, Sophie %A Quéré, Julien %A Chomérat, Nicolas %K 2014 %K rcc %K sbr?hyto?app %X A B S T R A C T The family Kareniaceae is mostly known in France for recurrent blooms of Karenia mikimotoi in the Atlantic, English Channel, and Mediterranean Sea and for the unusual green discoloration in the saltwater lagoon of Diana (Corsica) caused by Karlodinium corsicum in April 1994. In terms of diversity, this taxonomic group was long overlooked owing to the difficult identification of these small unarmored dinoflagellates. In this study, thanks to the molecular characterization performed on single cells from field samples and cultures, twelve taxonomic units were assigned to the known genera Karenia, Karlodinium and Takayama, whereas one could not be affiliated to any described genus. The molecular phylogeny inferred from the D1–D2 region of the LSU rDNA showed that five of them formed a sister taxon of a known species, and could not be identified at species-level, on the basis of molecular analysis only. Among these latter taxa, one Karlodinium which was successfully cultured was investigated by studying the external morphological features (using two procedures for cells fixation), ultrastructure, pigment composition, and haemolytic activity. The results of our analyses corroborate the genetic results in favour of the erection of Karlodinium gentienii sp. nov., which possesses an internal complex system of trichocysts connected to external micro-processes particularly abundant in the epicone, and a peculiar pigment composition. In addition, preliminary assays showed a haemolytic activity. %B Harmful Algae %V 40 %P 75–91 %G eng %U http://linkinghub.elsevier.com/retrieve/pii/S1568988314001863 %R 10.1016/j.hal.2014.10.006