| Centropyxidae | |
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| Centropyxis aculeata | |
| Scientific classification | |
| Domain: | |
| (unranked): | |
| Class: | |
| Order: | |
| Family: | Centropyxidae |
| Genera [1] | |
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Centropyxidae is a family of Amoebozoa.
| Centropyxidae | |
|---|---|
| | |
| Centropyxis aculeata | |
| Scientific classification | |
| Domain: | |
| (unranked): | |
| Class: | |
| Order: | |
| Family: | Centropyxidae |
| Genera [1] | |
| |
Centropyxidae is a family of Amoebozoa.
Amoebozoa is a major taxonomic group containing about 2,400 described species of amoeboid protists, often possessing blunt, fingerlike, lobose pseudopods and tubular mitochondrial cristae. In most classification schemes, Amoebozoa is ranked as a phylum within either the kingdom Protista or the kingdom Protozoa. In the classification favored by the International Society of Protistologists, it is retained as an unranked "supergroup" within Eukaryota. Molecular genetic analysis supports Amoebozoa as a monophyletic clade. Most phylogenetic trees identify it as the sister group to Opisthokonta, another major clade which contains both fungi and animals as well as some 300 species of unicellular protists. Amoebozoa and Opisthokonta are sometimes grouped together in a high-level taxon, variously named Unikonta, Amorphea or Opimoda.
Lobosa is a taxonomic group of amoebae possessing broad, bluntly rounded pseudopods. In current classification schemes, it is a subphylum of Amoebozoa, composed of amoebae that have lobose pseudopods but lack cilia or flagella.
Unikonts or Amorphea are members of a taxonomic supergroup that includes the basal Amoebozoa and Obazoa. That latter contains the Opisthokonta, which includes the Fungi, Animals and the Choanomonada, or Choanoflagellates. The taxonomic affinities of the members of this clade were originally described and proposed by Thomas Cavalier-Smith.
The Amoebidae are a family of Amoebozoa, including naked amoebae that produce multiple pseudopodia of indeterminate length. These are roughly cylindrical with granular endoplasm and no subpseudopodia, as found in other members of the class Tubulinea. During locomotion one pseudopod typically becomes dominant and the others are retracted as the body flows into it. In some cases the cell moves by "walking", with relatively permanent pseudopodia serving as limbs.
The Hartmannellidae are a family of amoebozoa, usually found in soils. When active they tend to be roughly cylindrical in shape, with a single leading pseudopod and no subpseudopodia. This form somewhat resembles a slug and as such they are also called limax amoebae. Trees based on rRNA show the Hartmannellidae as usually defined are paraphyletic to the Amoebidae, which may adopt similar forms.
The Tubulinea are a major grouping of Amoebozoa, including most of the larger and more familiar amoebae like Amoeba, Arcella, and Difflugia.
Discosea is a class of Amoebozoa, consisting of naked amoebae with a flattened, discoid body shape. Members of the group do not produce tubular or subcylindrical pseudopodia, like amoebae of the class Tubulinea. When a discosean is in motion, a transparent layer called hyaloplasm forms at the leading edge of the cell. In some discoseans, short "subpseudopodia" may be extended from this hyaloplasm, but the granular contents of the cell do not flow into these, as in true pseudopodia. Discosean amoebae lack hard shells, but some, like Cochliopodium and Korotnevella secrete intricate organic scales which may cover the upper (dorsal) surface of the cell. No species have flagella or flagellated stages of life.
Protozoan infections are parasitic diseases caused by organisms formerly classified in the Kingdom Protozoa. They include organisms classified in Amoebozoa, Excavata, and Chromalveolata.
An amebicide is an agent used in the treatment of amoebozoa infections, called amoebiasis. Among these agents are the following, linked to the infections they are used to treat:
Phalansterium is a genus of single-celled flagellated organisms comprising several species, which form colonies. Phalansterium produces tetraspores.
Himatismenida is an Amoebozoa order, in the class Discosea, along with Glycostylida and Dermamoebida. It contains species such asCochliopodium gallicum.
Thecamoebidae is an Amoebozoa family.
Leptomyxida is an order of Amoebozoa.
Mayorella is a genus of Amoebozoa.
Liceida is an order of Amoebozoa.
Multicilia is a flagellated genus of Amoebozoa.
The Flabellinia are a subclass of Amoebozoa. During locomotion the cells are flattened and have a clear layer called hyaloplasm along the front margin. Some form slender subpseudopodia projecting outward from the hyaloplasm, but the cell mass does not flow into these as in true pseudopodia, and advances without a definite central axis as in the Tubulinea. They also lack distinctive features like shells and flagella, and are united mainly by evidence from molecular trees.
Centropyxiella is a genus of Amoebozoa in the family Centropyxidae.
Centropyxiella elegans is a species of Amoebozoa in the family Centropyxidae. It is found in the European waters of the North Atlantic Ocean.
Obazoa is a proposed sister clade of Amoebozoa. Obazoa is composed of Breviatea, Apusomonadida and Opisthokonta, and specifically excludes the Amoebozoa. Determining the placement of Breviatea and Apusomonadida and their properties is of interest for the development of the Opisthokonts in which the main lineages of Animals and Fungi emerged. The relationships among opisthokonts, breviates and apusomonads are not conclusively resolved, though Breviatea is usually inferred to be the most basal of the three lineages. Ribosomal RNA phylogenies do not usually recover Obazoa as a clade, probably reflecting their stemming from a very ancient common ancestor, and little phylogenetic signal remains in datasets consisting of one or a few genes.
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