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Pavlovales
: Pavlovaceae is a family (biology), family of haptophytes. It is the only family in the order Pavlovales, which is the only order in the class Pavlovophyceae. It contains four genera, ''Diacronema'', ''Exanthemachrysis'', ''Pavlova (alga), Pavlova'' and ''Rebecca (genus), Rebecca''. Pavlovophyceae haptophytes also reportedly store photosynthetic carbon in paramylon polysaccharide granules (with a crystalline microfibrillar structure), unlike the chrysolaminarin used as the polysacharide storage form by most haptophytes. References Haptophyte families Haptista families {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haptophyte Families
The haptophytes, classified either as the Haptophyta, Haptophytina or Prymnesiophyta (named for ''Prymnesium''), are a clade of algae. The names Haptophyceae or Prymnesiophyceae are sometimes used instead. This ending implies classification at the class rank rather than as a division. Although the phylogenetics of this group has become much better understood in recent years, there remains some dispute over which rank is most appropriate. Characteristics The chloroplasts are pigmented similarly to those of the heterokonts, but the structure of the rest of the cell is different, so it may be that they are a separate line whose chloroplasts are derived from similar red algal endosymbionts. Haptophyte chloroplasts contain chlorophylls a, c1, and c2 but lack chlorophyll b. For carotenoids, they have beta-, alpha-, and gamma- carotenes. Like diatoms and brown algae, they have also fucoxanthin, an oxidized isoprenoid derivative that is likely the most important driver of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haptophyte
The haptophytes, classified either as the Haptophyta, Haptophytina or Prymnesiophyta (named for '' Prymnesium''), are a clade of algae. The names Haptophyceae or Prymnesiophyceae are sometimes used instead. This ending implies classification at the class rank rather than as a division. Although the phylogenetics of this group has become much better understood in recent years, there remains some dispute over which rank is most appropriate. Characteristics The chloroplasts are pigmented similarly to those of the heterokonts, but the structure of the rest of the cell is different, so it may be that they are a separate line whose chloroplasts are derived from similar red algal endosymbionts. Haptophyte chloroplasts contain chlorophylls a, c1, and c2 but lack chlorophyll b. For carotenoids, they have beta-, alpha-, and gamma- carotenes. Like diatoms and brown algae, they have also fucoxanthin, an oxidized isoprenoid derivative that is likely the most important driver of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. 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 taxonomy (biology), 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. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diacronema
''Diacronema'' is a genus of haptophytes. It includes the 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), ... '' Diacronema vlkianum''. The ''Diacronema'' genus also includes the marine alga '' Diacronema lutheri''. ''D. lutheri'' is a flagellated mobile microalga. It has two apical flagella of different lengths and a haptonema. ''D.lutheri'' is capable of producing a large amount of polyunsaturated fatty acids, especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). This characteristic is therefore widely used to feed bivalve molluscs, crustaceans and fish. References Haptophyte genera {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exanthemachrysis
''Exanthemachrysis'' is a genus of haptophyte The haptophytes, classified either as the Haptophyta, Haptophytina or Prymnesiophyta (named for '' Prymnesium''), are a clade of algae. The names Haptophyceae or Prymnesiophyceae are sometimes used instead. This ending implies classification at ...s. It includes the species ''Exanthemachrysis gayraliae''. References Haptophyte genera {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pavlova (alga)
''Pavlova'' is a genus of algae belonging to the family Pavlovaceae. The genus has cosmopolitan distribution. The genus name of ''Pavlova'' is in honour of Anna Pawlowna Pawlowa (1881–1931), who was a Russian prima ballerina of the late 19th and the early 20th centuries. This is because "the movement of the type species, ''Pavlova gyrans'', is positively balletic". The genus was circumscribed by Roger William Butcher in J. Mar. Biol. Assoc. U.K. vol.31 on page 183, fig. 35-38 in 1952. Species As accepted by Algaebase AlgaeBase is a global species database of information on all groups of algae, both seaweed, marine and freshwater algae, freshwater, as well as sea-grass. History AlgaeBase began in March 1996, founded by Michael D. Guiry, Michael Guiry. Text ...; *'' Pavlova calceolata'' *'' Pavlova ennorea'' *'' Pavlova granifera'' *'' Pavlova gyrans'' *'' Pavlova helicata'' *'' Pavlova hommersandii'' *'' Pavlova lutheri'' *'' Pavlova mesolychnon'' *'' Pavlova ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rebecca (genus)
''Rebecca'' is a genus of photosynthetic, flagellated marine haptophytes. It is one of four genera in the family Pavlovaceae. The holotype species, '' R. salina'', was described in 2000 by J.C. Green; it is one of three species currently accepted in the genus. Also in the genus is '' R. helicata'', which was described in the same publication as ''R. salina'', and the third member is '' R. billiardiae'', which was described in 2023. ''R. helicata'' and ''R. salina'' were both previously considered to be within the genus ''Pavlova Pavlova is a meringue-based dessert. Originating in either Australia or New Zealand in the early 20th century, it was named after the Russian ballerina Anna Pavlova.Boylen, Jeremy (reporter) (20 August 2004)Pavlova''George Negus Tonight'', Au ...''. Etymology ''Rebecca'' was named by J.C. Green after his daughter, Rebecca Jane Victoria Green. Type species The type species is ''R. salina''. Taxonomy The genus ''Rebecca'' was formed followin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prymnesiophyceae009-Pavlovae
Prymnesiophyceae is a haptophyte class. Although it was originally described by Casper in 1972, it did not receive a Latin diagnosis (a requirement for valid publication under the International Code of Botanical Nomenclature The ''International Code of Nomenclature for algae, fungi, and plants'' (ICN or ICNafp) is the set of rules and recommendations dealing with the formal botanical names that are given to plants, fungi and a few other groups of organisms, all tho ...) until David John Hibberd, Hibberd provided one in 1976. References Haptophyte classes Haptista classes {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family (, : ) 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". The delineation of what constitutes a family—or whether a described family should be acknowledged—is established and decided upon by active taxonomists. There are not strict regulations for outlining or acknowledging a family, yet in the realm of plants, these classifications often rely on both the vegetative and reproductive characteristics of plant species. Taxonomists frequently hold varying perspectives on these descriptions, leading to a lack of widespread consensus within the scientific community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paramylon
Paramylon is a carbohydrate similar to starch. The chloroplasts found in ''Euglena'' contain chlorophyll which aids in the synthesis of carbohydrates to be stored as starch granules and paramylon. Overview Paramylon is made in the pyrenoids of ''Euglena''. The euglenoids have chlorophylls a and b and they store their photosynthate in an unusual form called paramylon starch, a β-1,3 polymer of glucose. The paramylon is stored in rod like bodies throughout the cytoplasm, called paramylon bodies, which are often visible as colorless or white particles in light microscopy. Their shape is often characteristic of the ''Euglena'' species that produces them. Paramylon is also reportedly made in granuales by Pavlovophyceae haptophytes. Paramylon was named and first described in detail by Johann Gottlieb Johann Gottlieb (February 15, 1815 – March 4, 1875) was an Austrian chemist who first synthesized Propionic acid. He is also known for describing and naming Paramylon. Biog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chrysolaminarin
Chrysolaminarin is a linear polymer of β(1→3) and β(1→6) linked glucose units in a ratio of 11:1. It used to be known as leucosin. Function Chrysolaminarin is a storage polysaccharide typically found in photosynthetic heterokonts. It is used as a carbohydrate food reserve by phytoplankton such as Bacillariophyta (similar to the use of laminarin by brown algae). Chrysolaminarin is stored inside the cells of these organisms dissolved in water and encapsuled in vacuoles whose refractive index increases with chrysolaminarin content. In addition, heterokont algae Algae ( , ; : alga ) is an informal term for any organisms of a large and diverse group of photosynthesis, photosynthetic organisms that are not plants, and includes species from multiple distinct clades. Such organisms range from unicellular ... use oil as a storage compound. Besides energy reserve, oil helps the algae to control their buoyancy. Chrysolaminarin is also the major storage polysaccharide of mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
