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Novel unarmored dinoflagellates from the toxigenic family kareniaceae (gymnodiniales): five new species of Karlodinium and one new Takayama from the Australian sector of the Southern Ocean

Citation

de Salas, MF and Laza-Martinez, A and Hallegraeff, GM, Novel unarmored dinoflagellates from the toxigenic family kareniaceae (gymnodiniales): five new species of Karlodinium and one new Takayama from the Australian sector of the Southern Ocean, Journal of Phycology, 44, (1) pp. 241-257. ISSN 0022-3646 (2008) [Refereed Article]

DOI: doi:10.1111/j.1529-8817.2007.00458.x

Abstract

Six new species of unarmored dinoflagellates in the family Kareniaceae were isolated from the Australian sector of the Southern Ocean in March 2006: Takayama tuberculata de Salas sp. nov, Karlodinium antarcticum de Salas sp. nov., Karl. ballantinum de Salas sp. nov., Karl. conicum de Salas sp. nov., Karl. corrugatum de Salas sp. nov., and Karl. decipiens de Salas et Laza-Martínez sp. nov. These new taxa were characterized using light and electron microscopy and sequencing of the LSU rDNA and are well supported based either on their morphology or molecular phylogeny. Takayama tuberculata, isolated just north of the polar front (55°–57° S), is genetically close to T. tasmanica, but smaller, with a significantly reduced number of amphiesmal vesicles. Medium-sized Karl. antarcticum, also isolated from near the polar front, is characterized by its long ovoid cell outline and very long apical groove. The small Karl. ballantinum has a very short apical groove. The large Karl. conicum has a distinct conical epicone and spherical posterior nucleus. The small Karl. corrugatum, from just south of the polar front, has distinctive parallel striations on the epicone surface and a distinctively shaped and placed ventral pore. The large and widespread Karl. decipiens, distributed through Southern Ocean waters from the polar front to Tasmanian coastal waters, and coastal Spain, has a helicoidal chloroplast arrangement and a large central nucleus. This study represents the first description of species in the potentially ichthyotoxic family Kareniaceae recorded from the Southern Ocean.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Phycology (incl. Marine Grasses)
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity
Author:de Salas, MF (Dr Miguel de Salas)
Author:Hallegraeff, GM (Professor Gustaaf Hallegraeff)
ID Code:53335
Year Published:2008
Web of Science® Times Cited:33
Deposited By:Plant Science
Deposited On:2008-11-28
Last Modified:2009-05-14
Downloads:0

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