Introduction

This website includes those groups of protists traditionally lumped under the name "amoebae". Protists are defined only as a confederation of eukaryote organisms lacking the tissue level of organization seen in plants, animals, and fungi. The term "amoebae" is used for those protists that move and feed by means of cytoplasmic streaming. This unique method of locomotion is called amoeboid movement. Amoebae are also characterized by an irregular shape and the lack of a constant body form. The name "amoeba" is derived from an ancient Greek word, that means "changing". Cilia, if present,  are usually restricted to developmental stages. A characteristic feature of amoeboid locomotion is the formation of pseudopodia, temporary cytoplasmic extensions.

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The term "amoebae" is used for those protists that move and feed by means of cytoplasmic streaming. This unique method of locomotion is called amoeboid movement. Amoebae are also characterized by an irregular shape and the lack of a constant body form. The name "amoeba" is derived from an ancient Greek word, that means "changing". Cilia, if present,  are usually restricted to developmental stages. A characteristic feature of amoeboid locomotion is the formation of pseudopodia, temporary cytoplasmic extensions.

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The term "amoebae" is used for those protists that move and feed by means of cytoplasmic streaming. This unique method of locomotion is called amoeboid movement. Amoebae are also characterized by an irregular shape and the lack of a constant body form. The name "amoeba" is derived from an ancient Greek word, that means "changing". Cilia, if present,  are usually restricted to developmental stages. A characteristic feature of amoeboid locomotion is the formation of pseudopodia, temporary cytoplasmic extensions.

An example of how a caption can be added using the new File Entity type.

Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or

Introduction

This website includes those groups of protists traditionally lumped under the name "amoebae". Protists are defined only as a confederation of eukaryote organisms lacking the tissue level of organization seen in plants, animals, and fungi. The term "amoebae" is used for those protists that move and feed by means of cytoplasmic streaming. This unique method of locomotion is called amoeboid movement. Amoebae are also characterized by an irregular shape and the lack of a constant body form. The name "amoeba" is derived from an ancient Greek word, that means "changing". Cilia, if present,  are usually restricted to developmental stages. A characteristic feature of amoeboid locomotion is the formation of pseudopodia, temporary cytoplasmic extensions.

An example of how a caption can be added using the new File Entity type.

The term "amoebae" is used for those protists that move and feed by means of cytoplasmic streaming. This unique method of locomotion is called amoeboid movement. Amoebae are also characterized by an irregular shape and the lack of a constant body form. The name "amoeba" is derived from an ancient Greek word, that means "changing". Cilia, if present,  are usually restricted to developmental stages. A characteristic feature of amoeboid locomotion is the formation of pseudopodia, temporary cytoplasmic extensions.

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An example of how a caption can be added using the new File Entity type.

Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites.

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aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites.

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An example of how a caption can be added using the new File Entity type.

Many protists move and feed by amoeboid behavior, but many of them aren't closely related at all. Therefore, the term "amoebae" has no taxonomic value and is comparable with classifying organisms in e.g. "flying animals" or "four-legged animals".

 


Diversity
Traditionally amoebae were divided into shelled (Testacea) and naked amoeboids (Gymnamoebae). These names were recognized taxonomic units to describe these Protozoa, but the use of new techniques like the electron microscope has dramatically changed our scope. An example is the common amoeba Korotnevella (Fig. 1).

 

This is a caption

 

In light microscopy it appears to be naked, without any visible covering (Fig. 1A), but electron microscopy reveals that the cell is densely covered with self secreted micro-scales (Fig. 1B).

Some amoeboids like Cochliopodium species have larger micro-scales that can easily be seen with a light microscope. Such a flexible coating of micro-scales protects these -slow moving- cells against predators.

Other amoeboids have developed a thickened cell membrane or pellicle.

In light microscopy it appears to be naked, without any visible covering (Fig. 1A), but electron microscopy reveals that the cell is densely covered with self secreted micro-scales (Fig. 1B).

Some amoeboids like Cochliopodium species have larger micro-scales that can easily be seen with a light microscope. Such a flexible coating of micro-scales protects these -slow moving- cells against predators.

Other amoeboids have developed a thickened cell membrane or pellicle.

 

 

The largest number of amoeboid organisms can be found with the phyla Amoebozoa and Cercozoa. They have by far the greatest biomass of any protist taxon in soil and are also abundant in every marine habitat. They prey on bacteria and other protists.

Cercozoa is a diverse, increasingly well characterized phylum of protists founded mainly on the basis of 18S rDNA phylogenies that revealed a phylogenetic relationship between a variety of gliding zooflagellates and filose amoebae and the plasmodiophorid plant parasites. This diversity of cercozoan body forms includes:

 

 

Polychaos dubium
Polychaos dubium, a medium sized naked amoeba, changing its irregular shape within a minute.

 

aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites.

 

An example of how a caption can be added using the new File Entity type.

aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites. Amoeboid protists comprise a large and very diverse group with over 15,000 described species. Most are free-living, ubiquitous organisms that are widespread in nature and can be found in nearly any moist or aquatic habitat, aerobic or anaerobic. Some amoeboids are endosymbiotic, including pathogenic forms and parasites.

Cooking
An example of how a caption can be added using the new File Entity type.

Many protists move and feed by amoeboid behavior, but many of them aren't closely related at all. Therefore, the term "amoebae" has no taxonomic value and is comparable with classifying organisms in e.g. "flying animals" or "four-legged animals".

 


Diversity
Traditionally amoebae were divided into shelled (Testacea) and naked amoeboids (Gymnamoebae). These names were recognized taxonomic units to describe these Protozoa, but the use of new techniques like the electron microscope has dramatically changed our scope. An example is the common amoeba Korotnevella (Fig. 1).

This is a caption

In light microscopy it appears to be naked, without any visible covering (Fig. 1A), but electron microscopy reveals that the cell is densely covered with self secreted micro-scales (Fig. 1B).

Some amoeboids like Cochliopodium species have larger micro-scales that can easily be seen with a light microscope. Such a flexible coating of micro-scales protects these -slow moving- cells against predators.

Other amoeboids have developed a thickened cell membrane or pellicle.

In light microscopy it appears to be naked, without any visible covering (Fig. 1A), but electron microscopy reveals that the cell is densely covered with self secreted micro-scales (Fig. 1B).

Some amoeboids like Cochliopodium species have larger micro-scales that can easily be seen with a light microscope. Such a flexible coating of micro-scales protects these -slow moving- cells against predators.

Other amoeboids have developed a thickened cell membrane or pellicle.

 

 

The largest number of amoeboid organisms can be found with the phyla Amoebozoa and Cercozoa. They have by far the greatest biomass of any protist taxon in soil and are also abundant in every marine habitat. They prey on bacteria and other protists.

Cercozoa is a diverse, increasingly well characterized phylum of protists founded mainly on the basis of 18S rDNA phylogenies that revealed a phylogenetic relationship between a variety of gliding zooflagellates and filose amoebae and the plasmodiophorid plant parasites. This diversity of cercozoan body forms includes:

 

 

Polychaos dubium
Polychaos dubium, a medium sized naked amoeba, changing its irregular shape within a minute.