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.
Recent posts

Difflugia key spherical

Spherical tests Tests that are more or less spherical, some with a collar, but all without spines or other outgrowths. The aperture or pseudostome is

Read More »

Difflugia key compressed

Compressed tests Compressed tests are more or less oval or elliptical in cross-section. The aperture is round or oval or even lobed. This group has no

Read More »

Difflugia key lobed

Tests with lobed or irregular aperture The aperture of these tests is lobed, dentated or irregularly shaped. This group has no taxonomic significance. D. heterodentata D.

Read More »

Difflugia key oblong

Tests that are oblong or clavate in shape Tests are elongate ovate, or club-shaped, or clavate, with the widest part of the shell in the

Read More »