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The amoeba (sub Phylum Sarcodina) is a simple single celled animal of the group sarcomastigophora. They move by extending lobe-like projections of their cytoplasm called pseudopodia. Food is obtained by phagocytosis.
 Research Amoeba
Foraminifera is an order of animals of low type belonging to the class Rhizopoda, of the Phylum Protozoa, furnished with a shell or test, simple or complex, usually perforated by pores called foramina from which the animals get their name.
The shell may be composed of horny matter, or of carbonate of lime, secreted from the water in which they live. Owing to the resemblance of their convoluted chambered shells to those of the nautilus, they were at first reckoned among the most highly organized molluscs. In reality they are among the simplest of the protozoa. The body of the animal is composed of granular, gelatinous, highly elastic sarcode, which not only fills the shell, but passes through the perforations to the exterior, there giving off long thread - like processes called pseudopodia interlacing each other so as to form a net like a spider's web. Internally the sarcode-body exhibits no structure or definite organs of any kind.
Foraminifera appear very early in the geological formations. The great formation known as white chalk is largely composed of foraminiferous shells, while another remarkable formation known as Nummulitic Limestone receives its name from the presence of coin-shaped foraminifera, generally about 25 mm diameter.
Research Foraminifera
The Heliozoa are an order of Rhizopoda. The body is radially symmetrical and the pseudopodia are thin and stiff. Reproduction is by fission and sexually by the fusion of gametes.
Research Heliozoa
Infusoria is a class of minute animals. They are provided with a mouth, are without pseudopodia, and are furnished with vibratile cilia.
Research Infusoria
Pseudopodia are temporary projections from the cell of a Protozoan, leucocyte, etc., used for feeding and locomotion.
Research Pseudopodia
The radio-flagellata are a group of Protozoa having both flagella and pseudopodia.
Research Radio-Flagellata
The Radiolaria are an order of Rhizopoda. They are radially symmetrical and live in the surface layers of seas. They have stiff, radiating pseudopodia and a skeleton.
Research Radiolaria
Rhizopoda is a class of Phylum Protozoa which are usually free-living and move and ingest food by means of pseudopodia.
Research Rhizopoda
The Thalamophora are an order of Rhizopoda. They are amoeboid forms protected by a shell. There are apertures in the shell through which the pseudopodia extend.
Research Thalamophora
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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