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Arachnula
''Arachnula'' is a genus of amoeboid eukaryotes first described by Leon Cienkowski in 1876. Its phylogenetic position is a subject of some controversy. David Bass and colleagues considered it to be a vampyrellid within the Endomyxa clade of Rhizaria, and the SSU rDNA sequence isolated from an organism described as ''Arachnula impatiens'' is indeed very close to that of the vampyrellid '' Theratromyxa''. The identification of this organism as ''Arachnula'' has, however, been questioned; and a separate amoeba identified as ''Arachnula'' by Yonas Isaak Tekle and colleagues groups in molecular phylogenies close to the amoebozoans ''Filamoeba'' and ''Flamella An amoeba (; less commonly spelled ameba or amœba; plural ''am(o)ebas'' or ''am(o)ebae'' ), often called an amoeboid, is a type of cell or unicellular organism with the ability to alter its shape, primarily by extending and retracting pseudopo ...''. Which of these isolates corresponds to that originally described by Cienk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vampyrellid
The family Vampyrellidae is a subgroup of the order Aconchulinida (formerly Vampyrellida) within the phylum Cercozoa. Based on molecular sequence data, the family currently comprises the genus ''Vampyrella'', and maybe several other vampyrellid amoebae (e.g. ''Gobiella''). The cells are naked and characterised by radiating, filose pseudopodia (also referred to as filopodia) and an orange colouration of the main cell body. In former times the family Vampyrellidae contained several genera (e.g. ''Vampyrella'', ''Gobiella'', ''Leptophrys'', ''Platyreta'', ''Theratromyxa'') and was identical with the order Vampyrellida West, 1901, also known under the name "Aconchulinida". However, based on molecular sequence data it seemed reasonable to restrict the family Vampyrellidae to a subgroup (containing the genus ''Vampyrella'') and to establish another family for the genera ''Leptophrys'', ''Platyreta'' and ''Theratromyxa'', namely the Leptophryidae Hess et al., 2012. Characteristics Wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leon Cienkowski
Lev Semyonovich Tsenkovsky (Leon Cienkowski, russian: Лев Семенович Ценковский) (October 1 (Old Style and New Style dates, N.S. October 13), 1822 in Warsaw – September 25 (N.S. October 7), 1887 in Leipzig) was a Poles, Polish botanist, protozoologist, bacteriologist, who was mostly active in Ukraine, then part of the Russian Empire. He was a corresponding member of the Saint Petersburg Academy of Sciences (1881).
Lev Tsenkovsky graduated from Saint Petersburg University in 1844. As a professor, he taught at the Demidov Lyceum in Yaroslavl (1850-1854), Saint Petersburg University, Novorossiysk University in Odessa (1865-1871), and Kharkov University (1872-1887). Lev Tsenkovsky was one of the pioneers of the ontogenetic method of studying lower ...
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Endomyxa
Endomyxa is a subphylum of Rhizaria The Rhizaria are an ill-defined but species-rich supergroup of mostly unicellular eukaryotes. Except for the Chlorarachniophytes and three species in the genus Paulinella in the phylum Cercozoa, they are all non-photosynthethic, but many foramini .... References External links Bikont subphyla {{Cercozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizaria
The Rhizaria are an ill-defined but species-rich supergroup of mostly unicellular eukaryotes. Except for the Chlorarachniophytes and three species in the genus Paulinella in the phylum Cercozoa, they are all non-photosynthethic, but many foraminifera and radiolaria have a symbiotic relationship with unicellular algae. A multicellular form, ''Guttulinopsis vulgaris'', a cellular slime mold, has also been described. This group was used by Cavalier-Smith in 2002, although the term "Rhizaria" had been long used for clades within the currently recognized taxon. Being described mainly from rDNA sequences, they vary considerably in form, having no clear morphological distinctive characters (synapomorphies), but for the most part they are amoeboids with filose, reticulose, or microtubule-supported pseudopods. In the absence of an apomorphy, the group is ill-defined, and its composition has been very fluid. Some Rhizaria possess mineral exoskeleton (thecae or loricas), which is in differ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theratromyxa
An amoeba (; less commonly spelled ameba or amœba; plural ''am(o)ebas'' or ''am(o)ebae'' ), often called an amoeboid, is a type of cell or unicellular organism with the ability to alter its shape, primarily by extending and retracting pseudopods. Amoebae do not form a single taxonomic group; instead, they are found in every major lineage of eukaryotic organisms. Amoeboid cells occur not only among the protozoa, but also in fungi, algae, and animals. Microbiologists often use the terms "amoeboid" and "amoeba" interchangeably for any organism that exhibits amoeboid movement. In older classification systems, most amoebae were placed in the class or subphylum Sarcodina, a grouping of single-celled organisms that possess pseudopods or move by protoplasmic flow. However, molecular phylogenetic studies have shown that Sarcodina is not a monophyletic group whose members share common descent. Consequently, amoeboid organisms are no longer classified together in one group.Jan Pawlowski ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filamoeba
Echinamoebidae is a family of Amoebozoa, containing the genera '' Echinamoeba'' and '' Filamoeba''. It was established by Frederick Page in 1975. Taxonomy Family Echinamoebidae Page 1975 * Genus '' Comandonia'' Sawyer & Griffin 1975 ex Pernin & Pussard 1979 ** Species ''C. operculata'' Sawyer & Griffin 1975 ex Pernin & Pussard 1979 * Genus '' Micriamoeba'' Atlan et al. 2012 ** Species ''M. tesseris'' Atlan et al. 2012 * Genus '' Echinamoeba'' Page 1975 ** Species ''E. exudans'' (Page 1967) Page 1975 ** Species ''E. silvestris'' Page 1975 ** Species ''E. thermarum'' Baumgartner et al. 2003 References Amoebozoa families {{Amoebozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flamella
An amoeba (; less commonly spelled ameba or amœba; plural ''am(o)ebas'' or ''am(o)ebae'' ), often called an amoeboid, is a type of cell or unicellular organism with the ability to alter its shape, primarily by extending and retracting pseudopods. Amoebae do not form a single taxonomic group; instead, they are found in every major lineage of eukaryotic organisms. Amoeboid cells occur not only among the protozoa, but also in fungi, algae, and animals. Microbiologists often use the terms "amoeboid" and "amoeba" interchangeably for any organism that exhibits amoeboid movement. In older classification systems, most amoebae were placed in the class or subphylum Sarcodina, a grouping of single-celled organisms that possess pseudopods or move by protoplasmic flow. However, molecular phylogenetic studies have shown that Sarcodina is not a monophyletic group whose members share common descent. Consequently, amoeboid organisms are no longer classified together in one group.Jan Pawlowski ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proteomyxidea
Proteomyxidea is a class of Cercozoa. Although it is known to be paraphyletic In taxonomy, a group is paraphyletic if it consists of the group's last common ancestor and most of its descendants, excluding a few monophyletic subgroups. The group is said to be paraphyletic ''with respect to'' the excluded subgroups. In ..., further research is needed before its classification can be improved. References External links Cercozoa classes {{Cercozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
