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Eutreptiella
''Eutreptiella'' is a genus of Euglenozoa belonging to the family Eutreptiaceae (Eutreptiidae). The genus was first described by A. M. da Cunha in 1914. The genus has a cosmopolitan distribution. Description ''Eutreptiella'' consists of single, free-swimming flagellate cells. Cells have two or four unequal flagella, an eyespot (stigma), and discoid, stellate or reticulate chloroplasts (according to the species) The cells exhibit a form of movement called metaboly. Habitat and ecology ''Eutreptiella'' is found in marine habitats (typically in the neritic zone), or in brackish habitats such as estuaries. During spring and summer, it can form blooms and become locally dominant. At least one species ('' E. eupharyngea'') is mixotrophic and feeds on marine heteretrophic bacteria and cyanobacteria. Blooms of euglenoids can be beneficial, as a source of nutrition for animals. However, ''Eutreptiella'' has also been implicated in fish kills in Mexico. Biochemistry The chloropl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutreptiella Marina
''Eutreptiella'' is a genus of Euglenozoa belonging to the family Eutreptiaceae (Eutreptiidae). The genus was species description, first described by A. M. da Cunha in 1914. The genus has a cosmopolitan distribution. Description ''Eutreptiella'' consists of single, free-swimming flagellate cells. Cells have two or four unequal flagella, an eyespot apparatus, eyespot (stigma), and discoid, stellate or reticulate chloroplasts (according to the species) The cells exhibit a form of movement called metaboly. Habitat and ecology ''Eutreptiella'' is found in marine habitats (typically in the neritic zone), or in brackish habitats such as estuaries. During spring and summer, it can form algal bloom, blooms and become locally dominant. At least one species (''Eutreptiella eupharyngea, E. eupharyngea'') is mixotrophic and feeds on marine heteretrophic bacteria and cyanobacteria. Blooms of euglenoids can be beneficial, as a source of nutrition for animals. However, ''Eutreptiella'' has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutreptiella Hirudoidea
''Eutreptiella'' is a genus of Euglenozoa belonging to the family Eutreptiaceae (Eutreptiidae). The genus was first described by A. M. da Cunha in 1914. The genus has a cosmopolitan distribution. Description ''Eutreptiella'' consists of single, free-swimming flagellate cells. Cells have two or four unequal flagella, an eyespot (stigma), and discoid, stellate or reticulate chloroplasts (according to the species) The cells exhibit a form of movement called metaboly. Habitat and ecology ''Eutreptiella'' is found in marine habitats (typically in the neritic zone), or in brackish habitats such as estuaries. During spring and summer, it can form blooms and become locally dominant. At least one species ('' E. eupharyngea'') is mixotrophic and feeds on marine heteretrophic bacteria and cyanobacteria. Blooms of euglenoids can be beneficial, as a source of nutrition for animals. However, ''Eutreptiella'' has also been implicated in fish kills in Mexico. Biochemistry The chloropla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutreptiaceae
Eutreptiaceae ( ICN) or Eutreptiidae (ICZN) is a family of algae in the class Euglenophyceae. It is the only family within the monotypic order Eutreptiales (ICN) or Eutreptiida (ICZN). It contains predominantly marine single-celled flagellates with photosynthetic chloroplasts. Description Members of the family Eutreptiaceae are unicellular flagellates, microscopic eukaryotes or protists capable of swimming by using flagella. Each individual has two or four heterodynamic flagella, of equal or unequal length, emerging from a pocket in the anterior side of the cell. The cells are usually capable of extensive flexibility or metaboly, a characteristic of all spirocute euglenids. Every species of this family is phototroph Phototrophs () are organisms that carry out photon capture to produce complex organic compounds (e.g. carbohydrates) and acquire energy. They use the energy from light to carry out various cellular metabolic processes. It is a list of common m ...ic and found p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutreptia
''Eutreptia'' is a genus of Euglenozoa belonging to the family Eutreptiaceae (Eutreptiidae). The genus was species description, first described by Maximilian Perty in 1852. It has a cosmopolitan distribution, and is most commonly found in marine or brackish waters; however, some species have also been reported from freshwater. Description ''Eutreptia'' consists of single, free-swimming cells that are spindle-shaped with pronounced euglenoid movement (metaboly). Two heterodynamic flagella are present, both highly active while swimming, with a reddish eyespot apparatus, eyespot near the base. ''Eutreptia'' is photosynthetic with green chloroplasts; there may be numerous discoid or ribbon-shaped chloroplasts, often radiating from central pyrenoids surrounded by grains of paramylon. The chloroplast structure is similar to that of ''Euglena viridis'', but in ''Eutreptia'' what appears to be a stellate chloroplast actually consists complex of ribbon-shaped chloroplasts each with a ter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 contrast, a monophyletic grouping (a clade) includes a common ancestor and ''all'' of its descendants. The terms are commonly used in phylogenetics (a subfield of biology) and in the tree model of historical linguistics. Paraphyletic groups are identified by a combination of synapomorphies and symplesiomorphies. If many subgroups are missing from the named group, it is said to be polyparaphyletic. The term received currency during the debates of the 1960s and 1970s accompanying the rise of cladistics, having been coined by zoologist Willi Hennig to apply to well-known taxa like Reptilia (reptiles), which is paraphyletic with respect to birds. Reptilia contains the last common ancestor of reptiles and all descendants of that ancestor exc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetic
In biology, phylogenetics () is the study of the evolutionary history of life using observable characteristics of organisms (or genes), which is known as phylogenetic inference. It infers the relationship among organisms based on empirical data and observed heritable traits of DNA sequences, protein amino acid sequences, and morphology. The results are a phylogenetic tree—a diagram depicting the hypothetical relationships among the organisms, reflecting their inferred evolutionary history. The tips of a phylogenetic tree represent the observed entities, which can be living taxa or fossils. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the taxa represented on the tree. An unrooted tree diagram (a network) makes no assumption about directionality of character state transformation, and does not show the origin or "root" of the taxa in question. In addition to their use for inferring phylogenetic pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
