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The Kingdom Protozoa is a member of the Domain Eukaryota. Here is the complete "parentage" of Protozoa:

The Kingdom Protozoa is further organized into finer groupings including:


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Acrasidae is a family of slime molds which belongs to the protist group Percolozoa. The name acrasio- comes from the Greek Akrasia, meaning "acting against one's judgement." This group consists of cellular slime molds. [more]


The Amoebozoa are a major group of amoeboid protozoa, including the majority that move by means of internal cytoplasmic flow. Their pseudopodia are characteristically blunt and finger-like, called lobopodia. Most are unicellular, and are common in soils and aquatic habitats, with some found as symbiotes of other organisms, including several pathogens. The Amoebozoa also include the slime moulds, multinucleate or multicellular forms that produce spores and are usually visible to the unaided eye. [more]






Choanozoa (Greek: (choanos) = "funnel" + ???? (zoon) = "animal") is the name of a phylum of protists that belongs to the line of opisthokonts. [more]




The dinoflagellates (Greek d???? dinos "whirling" and Latin flagellum "whip, scourge") are a large group of flagellate protists. Most are marine plankton, but they are common in fresh water habitats as well. Their populations are distributed depending on temperature, salinity, or depth. Many dinoflagellates are known to be photosynthetic, but a large fraction of these are in fact mixotrophic, combining photosynthesis with ingestion of prey . Dinoflagellates are the largest group of marine eukaryotes aside from the diatoms. Being primary producers makes them an important part of the aquatic food chain. Some species, called zooxanthellae, are endosymbionts of marine animals and play an important part in the biology of coral reefs. Other dinoflagellates are colorless predators on other protozoa, and a few forms are parasitic (see for example Oodinium, Pfiesteria). [more]


The Euglenozoa are a large group of flagellate protozoa. They include a variety of common free-living species, as well as a few important parasites, some of which infect humans. There are two main subgroups, the euglenids and kinetoplastids. Euglenozoa are unicellular, mostly around 15-40 ?m in size, although some euglenids get up to 500 ?m long. [more]


The Foraminifera ("hole bearers"), or forams for short, are a large phylum of amoeboid protists. They are among the most common marine plankton species. Forams have reticulating pseudopods, fine strands of cytoplasm that branch and merge to form a dynamic net. They typically produce a test, or shell, which can have either one or multiple chambers, some becoming quite elaborate in structure. These shells are made of calcium carbonate (CaCO3) or agglutinated sediment particles. About 275,000 species are recognized, both living and fossil. They are usually less than 1 mm in size, but some are much larger, the largest species reaching up to 20 cm. [more]










Myxogastria (formely known as Myxomycota) is a class of Mycetozoa, itself a grouping of slime molds, that contains 5 orders, 14 families, 62 genera, and 888 species. Notable examples within Myxogastria include the genus Stemonitis and the species Physarum polycephalum. Myxogastria are also referred to as myxogastrids. [more]


Myzozoa is a grouping of Alveolata, that feed through myzocytosis. [more]




The Phytomyxea are a class of protists that are parasites of plants. It is divided into the orders Plasmodiophorida and Phagomyxida. A more common name for them is the plasmodiophorids, but this does not always include Phagomyxa (see taxobox). [more]


Protozoa are a diverse group of unicellular eukaryotic organisms, many of which are motile. Originally, protozoa had been defined as unicellular protists with animal-like behavior, e.g., movement. Protozoa were regarded as the partner group of protists to protophyta, which have plant-like behaviour, e.g., photosynthesis. [more]


Radiolarians (also radiolaria) are amoeboid protozoa (diameter 0.1-0.2 mm) that produce intricate mineral skeletons, typically with a central capsule dividing the cell into inner and outer portions, called endoplasm and ectoplasm. They are found as zooplankton throughout the ocean, and their skeletal remains cover large portions of the ocean bottom as radiolarian ooze. Due to their rapid turn-over of species, they represent an important diagnostic fossil found from the Cambrian onwards. Some common radiolarian fossils include , Heliosphaera and Hexadoridium. [more]


The phylum Sarcomastigophora belongs to the Protist kingdom and it includes many unicellular or colonial, autotrophic, or heterotrophic organisms. [more]

At least 880 species and subspecies belong to the Phylum Sarcomastigophora.

More info about the Phylum Sarcomastigophora may be found here.


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Last Revised: October 03, 2013
2013/10/03 15:22:05