Rhizamoeba
Rhizamoeba spec. – Crailoo, Netherlands 2018

 

Genus Rhizamoeba Page, 1972 emend. Smirnov et al., 2016

Diagnosis: Amoebae altering locomotive morphology from limax-like to flabellate, fan-shaped and possessing collosomes in a single studied species. Uninucleate or possessing limited number (less than 50) nuclei. Cells never adopt expanded, comet-like shapes.
Ultrastructure: In the SSU rDNA sequence remarkable deletion of ca. 20 bp starting from the positions 278 (in the sequence EU719197
Rhizamoeba saxonica CCAP1570/2) (against sequences of Flabellula spp.)

Type species: Rhizamoeba polyura Page, 1972

Known species:

1. Rhizamoeba saxonica Page, 1974
2. Rhizamoeba polyura Page, 1972
3. Rhizamoeba matisi Mrva, 2016

Ecology: Rhizamoeba-species aren’t rare, but often hard to find because they hide usually under debris.

Rhizamoeba clavarioides
Rhizamoeba clavarioides; N Nucleus; B Distinct border between hyaline zone and body; T Trailing filaments
Rhizamoeba clavarioides
Characteristic flow back of hyaloplasm along one side.
Rhizamoeba-spec
Rhizamoeba spec, with very long trailing filaments (arrowed). The largest part of the cell is out of focus.
Rhizamoeba spec. c. 130 µm wide – Florida, garden pond
Rhizamoeba
Rhizamoeba spec. – Crailoo, Netherlands 2018
Recent posts

Raphidocystis glabra

after Zlatogursky et al., 2018 Raphidocystis glabra Dürrschmidt, 1985 Diagnosis: Periplast 40-50 μm in diameter; spine-scales 4.6–15 μm; plate-scales 6-7 × 3-3.5 μm; tiny teeth

Read More »

Raphidocystidae

Raphidocystidae Zlatogursky, 2018 Diagnosis: centrohelids with monolayered plate-scales covering cell surface. Plate-scales with a hollow inflected margin. Sometimes trumpet-shaped or tubular spine-scales present, forming an

Read More »

Planhoogenraadia liboica

P. liboica – from Bonnet, 1979 Planhoogenraadia liboica Bonnet, 1979 Diagnosis: . Test relatively flat, with a dorsal convexity. Shell widest in the center. Aperture deep

Read More »

Deharvengia papuensis

Deharvengia papuensis, after Bonnet, 1979 Deharvengia papuensis  Bonnet, 1979 Diagnosis: Theca large, ovoid, very regular, colorless. Elliptical pseudostome bordered by a thick yellowish lip or

Read More »