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Perkinsea
Perkinsea is a class of alveolates. Taxonomy '' Perkinsus'' is a genus 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 nom ... in the class Perkinsea that is a parasite of bivalve molluscs; it displays a number of features characteristic of the dinoflagellates including laterally inserted heterodynamic flagella. However, it has been settled that '' Perkinsus'' does not belong into the phyla dinoflagellata, but rather into the phylum Perkinsozoa. Two other genera have been described in this class — '' Cryptophagus'' (now renamed '' Rastrimonas'') and '' Parvilucifera''. References Perkinsozoa Alveolata classes {{Alveolata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parvilucifera
''Parvilucifera'' is a genus of marine alveolates that parasitise dinoflagellates. Parvilucifera is a parasitic genus described in 1999 by Norén et al. It is classified perkinsozoa in the supraphylum of Alveolates. This taxon serves as a sister taxon to the dinoflagellates and apicomplexans. Thus far, five species have been described in this taxon, which include: P.infectans, P.sinerae, P.corolla, P.rostrata, and P.prorocentri. The genus Parvilucifera is morphologically characterized by flagellated zoospore. The life cycle of the species in this genus consist of free-living zoospores, an intracellular stage called trophont, and asexual division to form resting sporangium inside host cell. This taxon has gained more interest in research due to its potential significance in terms of negative regulation for dinoflagellates blooms, that have proved harmful for algal species, humans, and the shellfish industry (Norén et al. 1999). History The genus was first described by Noren and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rastrimonas
''Rastrimonas'' is a monotypic genus of parasitic alveolates in the phylum Apicomplexa. It contains the single species ''Rastrimonas subtilis''. It was described in 2002 from the free-living cryptomonad The cryptomonads (or cryptophytes) are a group of algae, most of which have plastids. They are common in freshwater, and also occur in marine and brackish habitats. Each cell is around 10–50 μm in size and flattened in shape, with an anteri ... '' Chilomonas paramaecium'' and placed in the new genus ''Cryptophagus''. The following year this was renamed ''Rastrimonas''. References {{Taxonbar, from=Q5191013 Apicomplexa genera Monotypic SAR supergroup genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptophagus (protozoa)
''Rastrimonas'' is a monotypic genus of parasitic alveolates in the phylum Apicomplexa. It contains the single species ''Rastrimonas subtilis''. It was described in 2002 from the free-living cryptomonad The cryptomonads (or cryptophytes) are a group of algae, most of which have plastids. They are common in freshwater, and also occur in marine and brackish habitats. Each cell is around 10–50 μm in size and flattened in shape, with an anteri ... '' Chilomonas paramaecium'' and placed in the new genus ''Cryptophagus''. The following year this was renamed ''Rastrimonas''. References {{Taxonbar, from=Q5191013 Apicomplexa genera Monotypic SAR supergroup genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perkinsozoa
Perkinsozoa is a proposed phylum of intracellular parasites in the superphylum Alveolata, which was suggested to account for the genus '' Perkinsus'' and other protist species that do not fit into existing Alveolata phyla. Members Members of this phylum include ''Perkinsus marinus'', '' Perkinsus olseni'' and the genus ''Parvilucifera''. * Class Perkinsea ** Order Perkinsida Levine 1978 *** Family Perkinsidae Levine 1978 em. Adl et al. 2005 **** Genus '' Perkinsus'' Levine 1978 ** Order Phagodiniida Cavalier-Smith 1993 *** Family Phagodiniidae Cavalier-Smith 1993 **** Genus '' Phagodinium'' Kristiansen 1993 ** Order Rastrimonadida Cavalier-Smith & Chao 2004 *** Family Rastrimonadidae **** Genus '' Rastrimonas'' Brugerolle 2003 *** Family Parviluciferaceae Reñé & Alacid 2017 **** Genus '' Dinovorax'' Alacid & Reñé 2017 **** Genus '' Snorkelia'' Reñé & Alacid 2017 **** Genus ''Parvilucifera ''Parvilucifera'' is a genus of marine alveolates that parasitise dinofl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perkinsus
''Perkinsus'' is a genus of alveolates in the phylum Perkinsozoa. The genus was erected in 1978 to better treat its type species, ''Perkinsus marinus'', known formerly as ''Dermocystidium marinum''. These are parasitic protozoans that infect molluscs, at least some of which cause disease and mass mortality. ''P. marinus'' is the most notorious, causing the disease perkinsosis, or dermo, in wild and farmed oysters.Petty, D''Perkinsus'' Infections of Bivalve Molluscs.FA178. Fisheries and Aquatic Sciences. Florida Cooperative Extension Service. University of Florida IFAS. 2010. As of 2004, six valid species were in the genus. At least two more have been described since then. Species and common hosts include: *'' Perkinsus andrewsi'' on Baltic clam (''Macoma balthica'') *'' Perkinsus beihaiensis'' on the oysters '' Magallana hongkongensis'' and '' M. ariakensis'' *'' Perkinsus chesapeaki'' on soft-shell clam (''Mya arenaria'') *'' Perkinsus honshuensis'' on Manila clam (''Venerup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinoflagellate
The dinoflagellates (Greek δῖνος ''dinos'' "whirling" and Latin ''flagellum'' "whip, scourge") are a monophyletic group of single-celled eukaryotes constituting the phylum Dinoflagellata and are usually considered algae. Dinoflagellates are mostly marine plankton, but they also are common in freshwater habitats. Their populations vary with sea surface temperature, salinity, and depth. Many dinoflagellates are photosynthetic, but a large fraction of these are in fact mixotrophic, combining photosynthesis with ingestion of prey (phagotrophy and myzocytosis). In terms of number of species, dinoflagellates are one of the largest groups of marine eukaryotes, although substantially smaller than diatoms. Some species are endosymbionts of marine animals and play an important part in the biology of coral reefs. Other dinoflagellates are unpigmented predators on other protozoa, and a few forms are parasitic (for example, ''Oodinium'' and ''Pfiesteria''). Some dinoflagellates pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylum
In biology, a phylum (; plural: phyla) is a level of classification or taxonomic rank below kingdom and above class. Traditionally, in botany the term division has been used instead of phylum, although the International Code of Nomenclature for algae, fungi, and plants accepts the terms as equivalent. Depending on definitions, the animal kingdom Animalia contains about 31 phyla, the plant kingdom Plantae contains about 14 phyla, and the fungus kingdom Fungi contains about 8 phyla. Current research in phylogenetics is uncovering the relationships between phyla, which are contained in larger clades, like Ecdysozoa and Embryophyta. General description The term phylum was coined in 1866 by Ernst Haeckel from the Greek (, "race, stock"), related to (, "tribe, clan"). Haeckel noted that species constantly evolved into new species that seemed to retain few consistent features among themselves and therefore few features that distinguished them as a group ("a self-contained unity" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flagella
A flagellum (; ) is a hairlike appendage that protrudes from certain plant and animal sperm cells, and from a wide range of microorganisms to provide motility. Many protists with flagella are termed as flagellates. A microorganism may have from one to many flagella. A gram-negative bacterium ''Helicobacter pylori'' for example uses its multiple flagella to propel itself through the mucus lining to reach the stomach epithelium, where it may cause a gastric ulcer to develop. In some bacteria the flagellum can also function as a sensory organelle, being sensitive to wetness outside the cell. Across the three domains of Bacteria, Archaea, and Eukaryota the flagellum has a different structure, protein composition, and mechanism of propulsion but shares the same function of providing motility. The Latin word means " whip" to describe its lash-like swimming motion. The flagellum in archaea is called the archaellum to note its difference from the bacterial flagellum. Eukaryoti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukaryota
Eukaryotes () are organisms whose Cell (biology), cells have a cell nucleus, nucleus. All animals, plants, fungi, and many unicellular organisms, are Eukaryotes. They belong to the group of organisms Eukaryota or Eukarya, which is one of the Three-domain system, three domains of life. Bacteria and Archaea (both prokaryotes) make up the other two domains. The eukaryotes are usually now regarded as having emerged in the Archaea or as a sister of the Asgard (archaea), Asgard archaea. This implies that there are only Two-domain system, two domains of life, Bacteria and Archaea, with eukaryotes incorporated among archaea. Eukaryotes represent a small minority of the number of organisms, but, due to their generally much larger size, their collective global biomass (ecology), biomass is estimated to be about equal to that of prokaryotes. Eukaryotes emerged approximately 2.3–1.8 billion years ago, during the Proterozoic eon, likely as Flagellated cell, flagellated phagotrophs. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollusc
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. The phylum is typically divided into 7 or 8 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known invertebrate species. The gastropods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAR Supergroup
The SAR supergroup, also just SAR or Harosa, is a clade that includes stramenopiles (heterokonts), alveolates, and Rhizaria. The name is an acronym derived from the first letters of each of these clades; it has been alternatively spelled "RAS". The term "Harosa" (at the subkingdom level) has also been used. The SAR supergroup is a node-based taxon. Note that as a formal taxon, "Sar" has only its first letter capitalized, while the earlier abbreviation, SAR, retains all uppercase letters. Both names refer to the same group of organisms, unless further taxonomic revisions deem otherwise. Members of the SAR supergroup were once included under the separate supergroups Chromalveolata (Chromista and Alveolata) and Rhizaria, until phylogenetic studies confirmed that stramenopiles and alveolates diverged with Rhizaria. This apparently excluded haptophytes and cryptomonads, leading Okamoto ''et al.'' (2009) to propose the clade Hacrobia to accommodate them. Phylogeny Based on a compi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
