title: Partenskyella glossopodia gen. et sp. nov., the first report of a Chlorarachniophyte that lacks a pyrenoid.
abstract: A new chlorarachniophyte, Partenskyella glossopodia gen. et sp. nov., is described from a culture isolated from the Mediterranean Sea pelagic waters and maintained as strain RCC365 at the Roscoff Culture Collection (France). Vegetative cells of P. glossopodia are non-motile naked spherical cells. However, flagellate and amoeboid stages are also present in its life cycle. The cells are 2-4mum in diameter containing a pale-green, cup-shaped chloroplast, 1-2 mitochondria, a nucleus, and a Golgi apparatus. Vesicles containing storage product-like material are also present. The chloroplast is surrounded by four membranes possessing a nucleomorph in the periplastidal compartment. The minute cell size and the absence of a pyrenoid at any stage of the life cycle are unique characteristics among the chlorarachniophytes, which justifies our proposition for a new genus for strain RCC365.
authors.affiliation: Institute of Biological Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-8572, Japan.
authors.forename: Shuhei
authors.initials: S
authors.lastname: Ota
authors.forename: Daniel
authors.initials: D
authors.lastname: Vaulot
authors.forename: Florence
authors.initials: F
authors.lastname: Le Gall
authors.forename: Akinori
authors.initials: A
authors.lastname: Yabuki
authors.forename: Ken-Ichiro
authors.initials: K
authors.lastname: Ishida
mesh_terms: D002736:Chloroplasts / Q000648:ultrastructure; D048028:DNA, Algal / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D056890:Eukaryota / Q000235:genetics* / Q000648:ultrastructure*; D005407:Flagella / Q000648:ultrastructure; D008522:Mediterranean Sea; D010802:Phylogeny; D010933:Plankton / Q000648:ultrastructure*
chemical_list: D048028:DNA, Algal; D004275:DNA, Ribosomal