title: [Morphology of Mastigamoeba aspera Schulze, 1875 (Archamoebae, Pelobiontida)].
abstract: The morphology of Mastigamoeba aspera, a type species of the genus Mastigamoeba Schulze, 1875, has been investigated at the light- and electron-microscopical level. Motile individuals are oval or peach-shaped. Motile flagella is situated at the anterior end of uninucleate cells. During locomotion, the surface of mastigamoebes forms many conical or finger-shaped hyaline pseudopodia, wereas bulbous uroid is often formed at the posterior end of the cell. Micropopulations of M. aspera consist of uninucleate flagellate forms as well as multinucleate aflagellate ones. There is a thick layer ofglycocalix on the cell surface where many rod-shaped bacterial ectobionts live. The nucleus is vesicular with spherical central nucleolus. The flagellar apparatus of M. aspera is connected with nucleus to form so called kariomastigont. A single kinetosome is associated with many radial microtubules and a lateral root. A distinct microtubule organization centre (MTOC) is situated at the basal part of the kinetosome. Microtubules of the nuclear cone are connected with the MTOC. This microtubules take part in the formation of kariomastigont. The axoneme has a standart set of microtubules 9(2)+2. Digestive vacuoles are the main component of the cytoplasm of M. aspera. Beside, many light-difracted granules and glycogen bodies were found in the cells. Mitochondria, dictyosomes of the Golgi apparatus and microbodies were not revealed in the cytoplasm of M. aspera.
authors.forename: L V
authors.initials: LV
authors.lastname: Chistiakova
authors.forename: O A
authors.initials: OA
authors.lastname: Miteva
authors.forename: A O
authors.initials: AO
authors.lastname: Frolov
mesh_terms: D056896:Archamoebae / Q000648:ultrastructure*; D054468:Axoneme / Q000648:ultrastructure*; D001419:Bacteria; D002466:Cell Nucleolus / Q000648:ultrastructure*; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D005407:Flagella / Q000648:ultrastructure*; D019276:Glycocalyx / Q000648:ultrastructure; D008124:Locomotion; D008854:Microscopy, Electron; D022101:Microtubule-Organizing Center / Q000648:ultrastructure; D011554:Pseudopodia / Q000648:ultrastructure; D013559:Symbiosis; D014617:Vacuoles / Q000648:ultrastructure