Amoeba proteus
Amoeba proteus

 

Genus Amoeba Bory de St. Vincent, 1822

Diagnosis: locomotive cells commonly polypodial, with several tubular pseudopodia with hemispherical tips and usually hyaline caps; one pseudopodium dominant at one time, often with ectoplasmic ridges; monopodial in rapid locomotion; nucleus single, granular in most described species; resting cells irregularly rounded, floating form with long radiating pseudopodia; cytoplasm often with truncated bipyramidal crystals; posterior uroid morulate.

Ecology: Freshwater. In all kind of water types.

 

Key to the species:

1 Nucleus large, mean 40 µm, discoid, often biconcave A. proteus
Nucleus smaller, spherical, ovoid or compressed 2
2 Nucleus compressed spherical, ovoid or lens-shaped, mean 29 µm; crystals mainly squared A. borokensis
Nucleus spherical, often slightly compressed; numerous bipyramidal crystals

A. leningradensis

 

Amoeba proteus
Amoeba proteus: A-B-C polypodial forms; D monopodium; C specimen with numerous crystals; E dividing stage (fission sphere); F bipiramidal crystal; G tile-shaped crystal; H four crystals in a row.
Recent posts

Vexilliferidae

Family Vexilliferidae Page, 1987 Diagnosis: Amoebae with long, slender subpseudopodia (usually more than one) frequently giving a spiny appearance to the cell. Subpseudopodia from hyaline

Read More »

Tracheleuglypha dentata

Tracheleuglypha dentata, Ecuador (l) and the Netherlands (r) Tracheleuglypha dentata (Vejdovsky, 1882) Diagnosis: test clear, elliptical, round in cross-section; with circular, overlapping scales; no spines

Read More »

TestBeeld

Dit is een test ,et de library sasasa asas sass asas asas asa sas asas as asas asa sas asasasas asasa sas asasas asa sasa

Read More »

Sphenoderia sphaerica

Sphenoderia sphaerica Sphenoderia sphaerica Playfair, 1917 Diagnosis: Test almost spherical, very slightly compressed, side-view ovate-subglobose, end broadly oval; in front-view circular, truncate anteriorly. Pseudostome a

Read More »