Microworld

world of amoeboid organisms

Menu
Rhizamoeba
Rhizamonotactic form of Rhizamoeba spec.

 

Rhizamoeba spec.

This large Rhizamoeba had about 10-20 nuclei, each about 7 µm, with 1-3 peripheral nucleoli. It came up in a wet mount kept for some days in a moist chamber. In sediments from the Laegieskamp, 2014.

Stationary form, very sensitive to light, starts immedialtely retracting its pseudopodia when it comes into the light path.
Rhizamoeba
Rhizamoeba
The stationary form changes into a rhizomonotactic locomotive form.
Rhizamoeba
Rhizamoeba
Four nuclei, 6.4 – 7.3 µm (L) and four nuclei, 6.2 – 7.4 µm (R)
Recent posts

Penardochlamys arcelloides

P. arcelloides – after Penard, 1904 Penardochlamys arcelloides  (Penard, 1904) Deflandre, 1953 Diagnosis: Colorless or very slightly yellowish envelope, bag or cauldron-shaped, very thin, chitinous,

Read More »

Haplomyxa spec

Fig. 1: Main cell body of specimen A, partly hidden by debris Haplomyxa sp. Three specimens were observed in a Petri dish, along with two

Read More »

Lachmannia spec.

“Lachmannia” spec., body length 127 µm “Lachmannia” spec. I found two cells, size about 125 µm when ovoid, with an organic-walled membranous test and a

Read More »

Diplophrys spec. 7

Diplophrys spec., with three tufts of filopodia Diplophrys spec. These cells are granular, never seen before. I found them in a sample from the Bert

Read More »

Psammonobiotus spec.

I found this specimen in a sample from the Oppad, near Hilversum, 2020. It is similar to Psammonobiotus linearis, but lacks a clear spine at

Read More »

Sphenoderia compressa

Sphenoderia compressa, after Badewitz, 2002 Sphenoderia compressa Badewitz, 2002 Diagnosis: Test ovoid, oval in cross section, hyaline, covered with relatively small, oval, rather irregularly arranged

Read More »