Partenskyella glossopodia gen. et sp. nov., the First Report of a Chlorarachniophyte that Lacks a Pyrenoid

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. Ho...

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Bibliographic Details
Published in:Protist 2009-02, Vol.160 (1), p.137-150
Main Authors: Ota, Shuhei, Vaulot, Daniel, Gall, Florence Le, Yabuki, Akinori, Ishida, Ken-ichiro
Format: Article
Language:English
Subjects:
Cercozoa
chlorarachniophytes
Chloroplasts - ultrastructure
DNA, Algal - genetics
DNA, Ribosomal - genetics
Environmental Sciences
Eukaryota - genetics
Eukaryota - ultrastructure
Flagella - ultrastructure
Life Sciences
Mediterranean Sea
Partenskyella glossopodia
Phylogeny
picoplankton
Plankton - ultrastructure
secondary endosymbiotic alga
taxonomy
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Summary: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 2–4 μm 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.
ISSN:1434-4610
1618-0941
DOI:10.1016/j.protis.2008.09.003