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Closteriaceae
The Closteriaceae are one of four families of Charophyte green algae in the order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of ... Desmidiales (desmids).See the NCBIbr>webpage on Closteriaceae Data extracted from the References External links Scientific references Scientific databases Zygnematophyceae families Desmidiales {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zygnematophyceae Families
Zygnematophyceae (or Conjugatophyceae) is a class of green algae in the paraphylum streptophyte algae, also referred to as Charophyta, consisting of more than 4000 described species. It contains five orders: the Spirogloeales, the Serritaeniales, the Zygnematales, the Spirogyrales, and the Desmidiales. The Zygnematophyceae are the sister clade of the land plants. The body plan of Zygnematophyceae is simple, and appear to have gone through a secondary loss of morphological complexity. The most basal members are unicellular, but filamentous species have evolved at least five times. They contain genes involved in protection from desiccation that appear to have been derived by horizontal gene transfer from bacteria; the genes are found in plants, Zygnematophyceae, bacteria, but no other organisms. The genes may have helped to enable plants to make the transition to life on land. Sexual reproduction in the Zygnematophyceae takes place through a process called ''conjugation''. Here cel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmidiales
Desmidiales, commonly called desmids (''Gr.'' ''desmos'', bond or chain), are an order in the Charophyta, a division of green algae in which the land plants (Embryophyta) emerged. Or in other words, Desmid, (order Desmidiales), order of single-celled (sometimes filamentous or colonial) microscopic green algae. Desmids are sometimes treated as a family (Desmidiaceae) of the order Zygnematales. The desmids belong to the class Zygnematophyceae. Although they are sometimes grouped together as a single family Desmidiaceae, most classifications recognize three to five families, either within the order Zygnematales or as their own order Desmidiales. The Desmidiales comprise around 40 genera and 5,000 to 6,000 species, found mostly but not exclusively in fresh water. Many species may be found in the fissures between patches of sphagnum moss in marshes. With a pH level of approximately 4.0, sphagnum peat provides the ideal environment for this flora. Morphology The structure of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Closterium Sp
''Closterium'' is a genus of unicellular charophyte green algae in the family Closteriaceae.See the NCBIbr>webpage on Closterium Data extracted from the Taxonomy ''Closterium regulare'' was first described from Lower Normandy by Brebisson.Carter, C.F. and Williamson, D.B. (2008) A rediscovered UK desmid: ''Closterium regulare'' Breb ''The Phycologist.'' Autumn 2008 No.75:24 Species ''Closterium'' includes the following species: * '' C. acerosum'' * '' C. calosporum'' ** '' C. calosporum var. himalayense'' * '' C. cornu'' * '' C. ehrenbergii'' * '' C. gracile'' * '' C. incurvum'' * '' C. littorale'' * '' C. lunula'' * '' C. moniliferum'' * '' C. navicula'' * '' C. peracerosum'' * '' C. peracerosum-strigosum-littorale complex'' * '' C. pleurodermatum'' * '' C. pusillum'' * '' C. selenastrum'' * '' C. setaceum'' * '' C. spinosporum'' * '' C. tumidum'' * '' C. venus'' * '' C. wallichii'' Reproduction Asexual: binary fission from a partitioned parent cell. Sexual: Conju ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Closterium
''Closterium'' is a genus of unicellular charophyte green algae in the family Closteriaceae.See the NCBIbr>webpage on Closterium Data extracted from the Taxonomy ''Closterium regulare'' was first described from Lower Normandy by Brebisson.Carter, C.F. and Williamson, D.B. (2008) A rediscovered UK desmid: ''Closterium regulare'' Breb ''The Phycologist.'' Autumn 2008 No.75:24 Species ''Closterium'' includes the following species: * '' C. acerosum'' * '' C. calosporum'' ** '' C. calosporum var. himalayense'' * '' C. cornu'' * '' C. ehrenbergii'' * '' C. gracile'' * '' C. incurvum'' * '' C. littorale'' * '' C. lunula'' * '' C. moniliferum'' * '' C. navicula'' * '' C. peracerosum'' * '' C. peracerosum-strigosum-littorale complex'' * '' C. pleurodermatum'' * '' C. pusillum'' * '' C. selenastrum'' * '' C. setaceum'' * '' C. spinosporum'' * '' C. tumidum'' * '' C. venus'' * '' C. wallichii'' Reproduction Asexual: binary fission from a partitioned parent cell. Sexual: Conju ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinoclosterium
''Spinoclosterium'' is a genus of green algae, specifically of the Closteriaceae.See the NCBI The National Center for Biotechnology Information (NCBI) is part of the United States National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. The ...br>webpage on Spinoclosterium Data extracted from the References External links Scientific references Scientific databases * AlgaTerra databaseIndex Nominum Genericorum Desmidiales Charophyta genera {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus (biology)
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus '' Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charophyta
Charophyta () is a group of freshwater green algae, called charophytes (), sometimes treated as a division, yet also as a superdivision or an unranked clade. The terrestrial plants, the Embryophyta emerged within Charophyta, possibly from terrestrial unicellular charophytes, with the class Zygnematophyceae as a sister group. The clade Streptophyta may be formed by placing Embryophyta within the Charophyta. The Embryophyta may already be included in the Charophyta, in which case it is a synonym of the Streptophyta. The sister group of the charophytes are the Chlorophyta. In some charophyte groups, such as the Zygnematophyceae or conjugating green algae, flagella are absent and sexual reproduction does not involve free-swimming flagellate sperm. Flagellate sperm, however, are found in stoneworts ( Charales) and Coleochaetales, orders of parenchymatous charophytes that are the closest relatives of the land plants, where flagellate sperm are also present in all except the coni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Algae
The green algae (singular: green alga) are a group consisting of the Prasinodermophyta and its unnamed sister which contains the Chlorophyta and Charophyta/ Streptophyta. The land plants (Embryophytes) have emerged deep in the Charophyte alga as sister of the Zygnematophyceae. Since the realization that the Embryophytes emerged within the green algae, some authors are starting to properly include them. The completed clade that includes both green algae and embryophytes is monophyletic and is referred to as the clade Viridiplantae and as the kingdom Plantae. The green algae include unicellular and colonial flagellates, most with two flagella per cell, as well as various colonial, coccoid and filamentous forms, and macroscopic, multicellular seaweeds. There are about 22,000 species of green algae. Many species live most of their lives as single cells, while other species form coenobia (colonies), long filaments, or highly differentiated macroscopic seaweeds. A few other org ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order (biology)
Order ( la, ordo) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized by the nomenclature codes. An immediately higher rank, superorder, is sometimes added directly above order, with suborder directly beneath order. An order can also be defined as a group of related families. What does and does not belong to each order is determined by a taxonomist, as is whether a particular order should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing an order. Some taxa are accepted almost universally, while others are recognized only rarely. The name of an order is usually written with a capital letter. For some groups of organisms, their orders may fol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Center For Biotechnology Information
The National Center for Biotechnology Information (NCBI) is part of the United States National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. The NCBI is located in Bethesda, Maryland, and was founded in 1988 through legislation sponsored by US Congressman Claude Pepper. The NCBI houses a series of databases relevant to biotechnology and biomedicine and is an important resource for bioinformatics tools and services. Major databases include GenBank for DNA sequences and PubMed, a bibliographic database for biomedical literature. Other databases include the NCBI Epigenomics database. All these databases are available online through the Entrez search engine. NCBI was directed by David Lipman, one of the original authors of the BLAST sequence alignment program and a widely respected figure in bioinformatics. GenBank NCBI had responsibility for making available the GenBank DNA seq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
