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Schroederia (alga)
''Schroederia'' is a genus (biology), genus of green algae in the family Schroederiaceae. Schroederiaceae is a Monotypic taxon, monotypic taxon; ''Schroederia'' is its only genus. The genus was circumscription (taxonomy), circumscribed by Ernst Johann Lemmermann in Hedwigia vol.37 on page 311 in 1898. The genus name of ''Schroederia'' is in honour of Ludwig Julius Bruno Schröder (1867–1928), who was a German teacher, botanist (Algology and Bryology), also Hydrobiologist and Zoologist. He worked as a deputy head teacher in Breslau. Description ''Schroederia'' consists of solitary cells that are needle- or spindle-shaped. They may be straight or curved. The cells end in long spines; at one end the spine may be bifurcated. Cells contain a single parietal chloroplast and one or several pyrenoids. As the cell matures, it develops multiple parietal chloroplasts along its long axis. Cells have one cell nucleus, nucleus (uninucleate) when young but may become multinucleate. Species a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include non-salty mineral-rich waters, such as chalybeate springs. Fresh water may encompass frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ sleet and graupel, and surface runoffs that form inland bodies of water such as wetlands, ponds, lakes, rivers, streams, as well as groundwater contained in aquifers, subterranean rivers and lakes. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of vascular plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. Fresh water is the water resource that is of the most and immediate use to humans. Fresh water is n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudoschroederia Robusta
''Pseudoschroederia'' is a genus of green algae in the family Characiaceae. It is planktonic in freshwater habitats, and probably has a cosmopolitan distribution. The genus ''Pseudoschroederia'' was circumscribed by Eberhard Hegewald and Eberhard Schnepf in 1986. The genus was distinguished from the similar '' Schroederia'' by being heteropolar and differing cell structure. However, some authors do not consider the genera to be separate. ''Pseudoschroederia'' consists of solitary cells. Cells are spindle-shaped, straight or curved, 22–84 μm long. One end tapers into a spine-like point, while the other end is bluntly tipped. Cells contain one nucleus, a single parietal chloroplast and one or several pyrenoids with a starch sheath. Cells reproduce asexually by zoospores. Zoospores have two flagella and contractile vacuole A contractile vacuole (CV) is a sub-cellular structure (organelle) involved in osmoregulation. It is found predominantly in protists, including unicell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ankyra Judayi
''Ankyra'' is a genus of green algae in the family Characiaceae. This genus of algae is closely related to '' Atractomorpha'' and ''Sphaeroplea''. They are found in stagnant waters. ''Ankyra'' consists of single cells that are planktonic or epiphytic. Cells are spindle-shaped or cylindrical with the ends tapering into long spines. At one end, the spine is bifid and/or enlarged into a spatula-like appendage. The cell wall consists of two pieces that are joined together at the middle of the cell. One band-shaped chloroplast lines the inside of the cell membrane, and contains a single pyrenoid. Reproduction occurs via zoospores which are released when the two halves of the cell wall break apart, or through a hole formed in the cell wall. Sexual reproduction has not been observed in ''Ankyra''. However, various aplanospore {{Short pages monitor [Baidu] |
Pseudoschroederia Antillarum
''Pseudoschroederia'' is a genus of green algae in the family Characiaceae. It is planktonic in freshwater habitats, and probably has a cosmopolitan distribution. The genus ''Pseudoschroederia'' was circumscribed by Eberhard Hegewald and Eberhard Schnepf in 1986. The genus was distinguished from the similar '' Schroederia'' by being heteropolar and differing cell structure. However, some authors do not consider the genera to be separate. ''Pseudoschroederia'' consists of solitary cells. Cells are spindle-shaped, straight or curved, 22–84 μm long. One end tapers into a spine-like point, while the other end is bluntly tipped. Cells contain one nucleus, a single parietal chloroplast and one or several pyrenoids with a starch sheath. Cells reproduce asexually by zoospores. Zoospores have two flagella and contractile vacuole A contractile vacuole (CV) is a sub-cellular structure (organelle) involved in osmoregulation. It is found predominantly in protists, including unicell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ankyra Ancora
''Ankyra'' is a genus of green algae in the family Characiaceae. This genus of algae is closely related to ''Atractomorpha (alga), Atractomorpha'' and ''Sphaeroplea''. They are found in stagnant waters. ''Ankyra'' consists of single cells that are planktonic or epiphytic. Cells are spindle-shaped or cylindrical with the ends tapering into long spines. At one end, the spine is bifid and/or enlarged into a spatula-like appendage. The cell wall consists of two pieces that are joined together at the middle of the cell. One band-shaped chloroplast lines the inside of the cell membrane, and contains a single pyrenoid. Reproduction occurs via zoospores which are released when the two halves of the cell wall break apart, or through a hole formed in the cell wall. Sexual reproduction has not been observed in ''Ankyra''. However, various aplanospore-like stages and other resting stages have been observed in ''Ankyra'', and need to be studied further. Species are identified based on the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schroederia Spiralis
''Schroederia'' may refer to: * ''Schroederia'' (alga), a genus of algae, * ''Schroederia'' (bug), a genus of bugs in the tribe Mictini The MictiniAmyot, Serville (1843) ''Histoire naturelle des insectes. Hémiptères'' xxxi, 187. are a tribe of leaf-footed bugs, in the subfamily Coreinae erected by Amyot & Serville (as the "Mictides") in 1843. Genera are distributed from Afric .... * {{Disambiguation Genus disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
