Dinoflagellate,SEM

Numéro d’image : 12053547
Dinoflagellate,SEM
Dinoflagellate. Scanning electron micrograph (SEM) of the dinoflagellate,Dinophysis sp. Dinoflagellates are unicellular protozoans and about 90% are found in marine environments as plankton. They are characterised by a complex covering called an amphiesma,which is made of a continuous outer and inner membrane. The amphiesma can be perforated. Another major characteristic is the presence of two flagella (not visible here). One flagellum beats back and forth,while the other is flat and ribbon-like,and works as a rudder to steer and rotate. Dinophysis sp. produces lipophilic toxins,which can accumulate in shellfish and cause diarrhetic shellfish poisoning (DSP) in humans. Magnification: x1800 when printed at 10 centimetres wide. Specimen courtesy of Mike Allen,Plymouth Marine Laboratory
Licence : Droits gérés
Crédit: Science Photo Library / Gschmeissner, Steve
Taille de l’image : 4238 px × 4134 px
Model Release : Non requis
Property Release : Non requis
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