The ultrathin structure of amoeboid flagellate <Emphasis Type="Italic">Thaumatomastix</Emphasis> sp. (Thaumatomonadida (Shirkina) Karpov, 1990) |
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Authors: | V A Zolotarev Z M Myl’nikova A P Myl’nikov |
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Institution: | 1.Papanin Institute for Biology of Inland Waters,Russian Academy of Sciences,Borok, Nekouzskii raion, Yaroslavl oblast,Russia |
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Abstract: | The ultrathin structure of amoeboid flagellate Thaumatomastix sp. is considered. The cell is surrounded by two-layered triangular scales. They are formed on the surface of mitochondria.
Pseudopodia grabbing bacteria run from ventricular furrow, which is armored with two longitudinal bands of microtubules. Heterodynamic
flagella run from small flagellar pocket. Long back flagellum has thin mastigonemes. Proximal area of short flagellum is covered
with flat oval scales. Transitional flagellant zone has no spiral or other additional elements. Transverse plate is localized
above cell surface. Kinetosomes are parallel to each other. Vesicular nucleus and Golgi apparatus have typical structure.
Oval mitochondria contain tubular cristae. Within cytoplasm, extrusive organelles (kinetocysts) containing amorphous material
and capsule were found. The latter consists of muff and cylinder. Plasmodial and cystic phases of development have not been
discovered. Contractile vacuole is absent. The resemblance between Thaumatomastix sp. and other thaumatomonads has been discussed. |
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