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Vermamoebidae
The Tubulinea are a major grouping of Amoebozoa, including most of the more familiar amoebae genera like ''Amoeba'', '' Arcella'', '' Difflugia'' and '' Hartmannella''. Characteristics During locomotion most Tubulinea have a roughly cylindrical form or produce numerous cylindrical pseudopods. Each cylinder advances by a single central stream of cytoplasm, granular in appearance, and has no subpseudopodia. This distinguishes them from other amoeboid groups, although in some members this is not the normal type of locomotion. Classification This class was anticipated by some biologists such as Jahn, who grouped all amoebae with granular pseudopodia together, but most split the lobose amoebae into testate Testacealobosia and naked Gymnamoebia. These latter are polyphyletic, but molecular trees by Bolivar ''et al.'' identified a core monophyletic subgroup. Subsequent studies showed the testate lobose amoebae belong to the same group, which was thus renamed Lobosea ''sensu stric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microcoryciidae
The Tubulinea are a major grouping of Amoebozoa, including most of the more familiar amoebae genera like ''Amoeba (genus), Amoeba'', ''Arcella'', ''Difflugia'' and ''Hartmannella''. Characteristics During locomotion most Tubulinea have a roughly cylindrical form or produce numerous cylindrical pseudopods. Each cylinder advances by a single central stream of cytoplasm, granular in appearance, and has no subpseudopodia. This distinguishes them from other amoeboid groups, although in some members this is not the normal type of locomotion. Classification This class was anticipated by some biologists such as Jahn, who grouped all amoebae with granular pseudopodia together, but most split the lobose amoebae into testate Testacealobosia and naked Gymnamoebia. These latter are polyphyly, polyphyletic, but molecular trees by Bolivar ''et al.'' identified a core monophyletic subgroup. Subsequent studies showed the testate lobose amoebae belong to the same group, which was thus renamed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amoeba Proteus
''Amoeba proteus'' is a large species of amoeba closely related to another genus of giant amoebae, ''Chaos (genus), Chaos''. As such, the species is sometimes given the alternative scientific name ''Chaos diffluens''. This protozoan uses extensions called pseudopodia to move and to eat smaller unicellular organisms. Food is enveloped inside the cell's cytoplasm in a food vacuole, where ingested matter is slowly broken down by enzymes. ''A. proteus'' inhabits freshwater environments and feeds on protozoans, algae, rotifers, and even other smaller amoebae. They are colorless, but they may have colored inclusions derived from their food. ''A. proteus'' possesses a thick-walled cell nucleus, nucleus containing granular chromatin, and is therefore a eukaryote. Its cell membrane, membrane consists of a phospholipid bilayer similar to other eukaryotic organisms. History The first description of this amoeba is probably that of August Johann Rösel von Rosenhof who, in 1755, published dr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyphyly
A polyphyletic group is an assemblage that includes organisms with mixed evolutionary origin but does not include their most recent common ancestor. The term is often applied to groups that share similar features known as homoplasies, which are explained as a result of convergent evolution. The arrangement of the members of a polyphyletic group is called a polyphyly .. ource for pronunciation./ref> It is contrasted with monophyly and paraphyly. For example, the biological characteristic of warm-bloodedness evolved separately in the ancestors of mammals and the ancestors of birds; "warm-blooded animals" is therefore a polyphyletic grouping. Other examples of polyphyletic groups are algae, C4 photosynthetic plants, and edentates. Many taxonomists aim to avoid homoplasies in grouping taxa together, with a goal to identify and eliminate groups that are found to be polyphyletic. This is often the stimulus for major revisions of the classification schemes. Researchers concerned m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hartmannellidae
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 Paraphyly is a taxonomic term describing a grouping that consists of the grouping's last common ancestor and some but not all of its descendant lineages. The grouping is said to be paraphyletic ''with respect to'' the excluded subgroups. In co ... to the Amoebidae, which may adopt similar forms. References External links * * Amoebozoa families {{Amoebozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizamoebidae
''Rhizamoeba'' is a small genus of free-living Marine life, marine naked Lobosa, lobose Amoebozoa, amoebae in the monotypic family Rhizamoebidae in the order Leptomyxida. It is most closely related to ''Leptomyxa'' and ''Flabellula'', and some species have been moved to ''Leptomyxa'' due to molecular data. Morphology Members of ''Rhizamoeba'' are characterized by their morphology when they move, which is usually monopodial (with a single ramification), alternating between a slug-like shape and a fan shape. They have either one nucleus (cell), nucleus or multiple (less than 50) nuclei. Classification The paraphyly of the genus caused the transfer of two previously rhizamoeban species into ''Leptomyxa'': ''Leptomyxa australiensis, R. australiensis'' and ''Leptomyxa neglecta, R. neglecta''. As a result, only 3 species are currently confirmed as ''Rhizamoeba'': * ''Rhizamoeba saxonica'' * ''Rhizamoeba polyura'' * ''Rhizamoeba matisi'' Other possible species are not yet confirmed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptomyxidae
Leptomyxida is an order of Amoebozoa. It includes species such as ''Flabellula citata'', ''Paraflabellula hoguae'', ''Paraflabellula reniformis'', '' Rhizamoeba saxonica'' and '' Leptomyxa reticulata''. Taxonomy The taxonomy of Leptomyxida as revised in 2017 recognizes 23 confirmed species: *Order Leptomyxida **Family Flabellulidae ***'' Flabellula'' , (includes former '' Paraflabellula'' ) — 10 species **Family Gephyramoebidae Leptomyxida is an order of Amoebozoa. It includes species such as ''Flabellula citata'', '' Paraflabellula hoguae'', ''Paraflabellula reniformis'', '' Rhizamoeba saxonica'' and '' Leptomyxa reticulata''. Taxonomy The taxonomy of Leptomyxida as ... ***'' Gephyramoeba'' — 1 species **Family Leptomyxidae ***'' Leptomyxa'' — 9 species **Family Rhizamoebidae ***'' Rhizamoeba'' — 3 species References External links * Amoebozoa orders Tubulinea {{Amoebozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gephyramoebidae
Leptomyxida is an order of Amoebozoa. It includes species such as ''Flabellula citata'', '' Paraflabellula hoguae'', ''Paraflabellula reniformis'', '' Rhizamoeba saxonica'' and '' Leptomyxa reticulata''. Taxonomy The taxonomy of Leptomyxida as revised in 2017 recognizes 23 confirmed species: *Order Leptomyxida **Family Flabellulidae Leptomyxida is an Order (biology), order of Amoebozoa. It includes species such as ''Flabellula citata'', ''Paraflabellula hoguae'', ''Paraflabellula reniformis'', ''Rhizamoeba saxonica'' and ''Leptomyxa reticulata''. Taxonomy The taxonomy of L ... ***'' Flabellula'' , (includes former '' Paraflabellula'' ) — 10 species **Family Gephyramoebidae ***'' Gephyramoeba'' — 1 species **Family Leptomyxidae ***'' Leptomyxa'' — 9 species **Family Rhizamoebidae ***'' Rhizamoeba'' — 3 species References External links * Amoebozoa orders Tubulinea {{Amoebozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
