world of amoeboid organisms

Menu
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

Cyclopyxis overview 2

C. impressa C. impressa C. stellata C. stellata C. crucistoma C. crucistoma C. crucigenia C. crucigenia C. grospietschi C. grospietschi C. triquestrus C. triquestrus C.

Read More »

Cyclopyxis profundistoma

Cyclopyxis profundistoma – from Kufferath, 1932 Cyclopyxis profundistoma Kufferath, 1932 Diagnosis: The yellowish grey colored test is made of coarser mineral particles, which are connected

Read More »

Cyclopyxis maynei

Cyclopyxis maynei – from Kufferath, 1932 Cyclopyxis maynei Kufferath, 1932 Diagnosis: Test cylindrical, characterized by the size of the aperture, which is 87-97 μm wide

Read More »

Cyclopyxis kahli obliqua

C. kahli var. obliqua , after Decloitre, 1978 Cyclopyxis kahli var. obliqua   Decloitre, 1978 Diagnosis:  Test with all the characteristics of the type species

Read More »