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Dinophyceae


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'Dinophyceae' can also refer to...

Dinophyceae

Dinophyceae

Dinophyceae

Dinophyceae

Multiple bacterial infection ofAlexandrium catenella (Dinophyceae)

The balance of autotrophy and heterotrophy during mixotrophic growth of Karlodinium micrum (Dinophyceae)

Cyst formation: an important mechanism for the termination of Scrippsiella trochoidea (Dinophyceae) bloom

Biodiversity, biogeography and potential trophic impact of Protoperidinium spp. (Dinophyceae) off the southwestern coast of Ireland

Discrimination of Three Highly Toxic Alexandrium tamarense (Dinophyceae) Isolates Using FITC-conjugated Lectin Probes

Photophysiological responses of the toxic red-tide dinoflagellate Gymnodinium breve (Dinophyceae) under natural sunlight

Role of temporary cysts in the population dynamics of Alexandrium taylori (Dinophyceae)

Influences of temperature, salinity and irradiance on growth of Prorocentrum minimum (Dinophyceae) from the Mediterranean Sea

Effect of ambient medium viscosity on the motility and flagella motion of Prorocentrum minimum (Dinophyceae)

Molecular detection and species identification of Alexandrium (Dinophyceae) causing harmful algal blooms along the Chilean coastline

Vertical distribution and cyst production of Peridiniella catenata (Dinophyceae) during a spring bloom in the Baltic Sea

Distribution, dynamics and in situ seeding potential of Scrippsiella hangoei (Dinophyceae) cyst populations from the Baltic Sea

Cysts of Danish Gymnodinium nolleri Ellegaard et Moestrup sp. ined. (Dinophyceae): studies on encystment, excystment and toxicity

Interactions between red tide microalgae and herbivorous zooplankton: the noxious effects of Gyrodinium corsicum (Dinophyceae) on Acartia grani (Copepoda: Calanoida)

No difference found in ribosomal DNA sequences from physiologically diverse clones of Karenia brevis (Dinophyceae) from the Gulf of Mexico

 

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A class of Pyrrophyta, comprising algae that are unicellular and have two flagella (thread-like structures) of unequal length. Most dinoflagellates belong to this class and the cysts (dinocysts) are useful in biostratigraphy. The organisms have two biological stages. (a) In the motile (thecate) stage (see theca) the organism may have either a flexible cell wall or a rigid, armoured one, and it maintains itself in the water by active movement of the flagella. The cell surface bears two furrows, each holding one flagellum. The transverse furrow is called the ‘cingulum’, the longitudinal one the ‘sulcus’. The cingulum divides the cell into an anterior epitheca and a posterior hypotheca. The apex of the epitheca is sometimes extended to form an apical horn. (b) In the cyst stage the organism is dormant. When encystment occurs a two-layered cyst wall (phragma) is formed. Proximate cysts develop in the cyst wall, in contact with the wall from the motile stage. Chorate cysts develop deeper in the motile cell and are linked to the cell by processes. Cavate cysts are those where the two layers of the wall are separated by cavities. The organism leaves the cyst by an opening (archaeopyle) when conditions change. There are three important orders: Gymnodiniales, Peridiniales, and Dinophysiales.

(a) In the motile (thecate) stage (see theca) the organism may have either a flexible cell wall or a rigid, armoured one, and it maintains itself in the water by active movement of the flagella. The cell surface bears two furrows, each holding one flagellum. The transverse furrow is called the ‘cingulum’, the longitudinal one the ‘sulcus’. The cingulum divides the cell into an anterior epitheca and a posterior hypotheca. The apex of the epitheca is sometimes extended to form an apical horn. (b) In the cyst stage the organism is dormant.

Subjects: Earth Sciences and Geography.


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