world of amoeboid organisms

Dinamoeba mirabilis
Dinamoeba mirabilis, with cilium (arrow), about 260 µm long

Dinamoeba mirabilis Leidy, 1874

Diagnosis: Body oval to limaciform; spheroid when floating; pseudopodia numerous, conical; ectoplasm clear, usually with cils; endoplasm with food vacuoles, spherules and large clear globules; nucleus large, with fragmented nucleolar material; contractile vacuole present.

Dimensions: Spherical forms 64-160 µm in diameter; creeping forms 152-340 by 60-220 µm; cyst about 160 µm in diameter; nucleus 26-36 µm.

Ecology: in the ooze of ponds and ditches.

Dinamoeba mirabilis
Dinamoeba mirabilis, with large granular nucleus (n), cilium (f) and internal part of cilium (fi)
Dinamoeba mirabilis
Dinamoeba mirabilis, with large granular nucleus (centre) and without cilium, about 144 µm
Mastigamoeba
Dinamoeba mirabilis, with large granular nucleus (centre) and without cilium, about 144 µm
Mastigamoeba aspera nucleus=36um
Mastigamoeba aspera
The same cell as above, nucleus, 36 µm, surrounded with rod-shaped bacteria (right, arrows) – The Netherlands
Dinamoeba mirabilis
Dinamoeba mirabilis, arrow indicates cilium – Lolo Pass, Montana, USA
The same specimen as above, nucleus 26 µm, surrounded with a layer of rod-shaped bacteria (right, arrow)
Mastigamoeba aspera
Dinamoeba mirabilis, somewhat flattened between cover slip and slide.
Mastigamoeba
Dinamoeba mirabilis, without cilium, about 144 µm
Dinamoeba mirabilis
Dinamoeba mirabilis, with cilium and large nucleus
Dinamoeba mirabilis
Dinamoeba mirabilis, the arrow points to the cilium
Mastigamoeba aspera
Dinamoeba mirabilis,about 80 µm, n = nucleus – Crailoo
Mastigamoeba aspera
Dinamoeba mirabilis, arrow points to large nucleus.
Ferry Siemensma, created March 2, 2019; last modified July 27, 2021
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