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Rozellomycota
Cryptomycota ('hidden fungi'), Rozellida, or Rozellomycota are a clade of micro-organisms that are either fungi or a sister group to fungi. They differ from classical fungi in that they lack chitinous cell walls at any trophic stage in their lifecycle, as reported by Jones and colleagues in 2011. Despite their unconventional phagocytic feeding habits (typical fungi are osmotrophic), chitin has been observed in the inner layer of resting spores, and in immature resting spores for some species of '' Rozella'', as indicated with calcofluor-white stain as well as the presence of a fungal-specific chitin synthase gene. History Formation of the Rozelida concept Rozellida were first detected as DNA sequences retrieved from a freshwater laboratory enclosure. Phylogenetic analysis of these sequences formed a unique terminal clade of then unknown affiliation provisionally called after the first clone in the clade: LKM11. The term "Rozellida" was coined in 2010, as it was found t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metchnikovellea
Microsporidia are a group of spore-forming unicellular parasites. These spores contain an extrusion apparatus that has a coiled polar tube ending in an anchoring disc at the apical part of the spore.Franzen, C. (2005). How do Microsporidia invade cells?. Folia Parasitologica, 52(1–2), 36–40. doi.org/10.14411/fp.2005.005 They were once considered protozoans or protists, but are now known to be fungi, or a sister group to true fungi. These fungal microbes are obligate eukaryotic parasites that use a unique mechanism to infect host cells. They have recently been discovered in a 2017 Cornell study to infect Coleoptera (beetles) on a large scale. So far, about 1500 of the probably more than one million species are named. Microsporidia are restricted to animal hosts, and all major groups of animals host microsporidia. Most infect insects, but they are also responsible for common diseases of crustaceans and fish. The named species of microsporidia usually infect one host species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rozellomyceta
Rozellomyceta is a subkingdom in the kingdom Fungi. In the consensus accepted by fungus researchers as of 2024, it contains only the Rozellomycota, which in turn contains Microsporidia as a class. An earlier view by fungus researchers divides it into two phyla, the Rozellomycota and Microsporidia as a phylum. A more fitting name for Microsporidia as a phylum could be Microsporidiomycota . This is no longer done because "recent phylogenies indicate that Microsporidia are deeply nested within Rozellomycota". Protistologists do not agree with the assignment of this subkingdom as fungi, because they subscribe to a narrow view of fungi as an osmotropic-only lineage (the eumycota), while this clade is largely phagotrophic. They believe that this clade should be the responsibility of protozoologists. * Under older protist classification, the included taxa are sometimes classified under the subkingdom Sarcomastigota within the kingdom Protozoa instead, although Sarcomastigota is consid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chytridiopsida
Chytridiopsida is an order of microsporidia Microsporidia are a group of spore-forming unicellular parasites. These spores contain an extrusion apparatus that has a coiled polar tube ending in an anchoring disc at the apical part of the spore.Franzen, C. (2005). How do Microsporidia inva ...ns in the monotypic class Chytridiopsidea. Taxonomy * Phylum Rozellomycota Dowell, 2013 ** Class Chytridiopsidea Issi 1980 – not recognized by the ''Outline'', which instead gives "Rozellomycota Orders incertae sedis" *** Order Chytridiopsida Weiser 1974 **** Family Buxtehudeidae Larsson 1980 **** Family Hesseidae Ormières & Sprague 1973 **** Family Chytridiopsidae Sprague, Ormières & Manier 1972 Former families * Burkeidae * Enterocytozoonidae References Microsporidia Fungus orders {{Fungus-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nucleophaga
Nucleophaga is a genus of eukaryotic microorganisms that are internal parasites of amoeba, flagellates, and ciliates. Morphology and life cycle ''Nucleophaga'' grows within the nucleus of its host cell. Its spores are ingested by the host and migrate to the nucleus. Once in the nucleus, the spores germinate giving rise to naked plasmodia in contact with the host's karyoplasm. It develops pseudopodia-like projections that may be involved in osmotrophy or phagocytosis. The ''Nucleophaga'' cells continue to enlarge until a cell wall replaces the projections and the ''Nucleophaga'' cytoplasm is divided into spores. Taxonomy Described by Dangeard in 1895, ''Nucleophaga'' was placed in Olpidiaceae, Chytridiales. Molecular phylogenetic studies have placed some members in the Cryptomycota/Rozellomycota. Species As according to a taxonomic summary. * ''Nucleophaga amoebae'' Dangeard 1895 * ''Nucleophaga hypertrophica'' Epstein 1922 * ''Nucleophaga intestinalis'' Brug 1926 * ''Nucleop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungi
A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as one of the kingdom (biology)#Six kingdoms (1998), traditional eukaryotic kingdoms, along with Animalia, Plantae, and either Protista or Protozoa and Chromista. A characteristic that places fungi in a different kingdom from plants, bacteria, and some protists is chitin in their cell walls. Fungi, like animals, are heterotrophs; they acquire their food by absorbing dissolved molecules, typically by secreting digestive enzymes into their environment. Fungi do not photosynthesize. Growth is their means of motility, mobility, except for spores (a few of which are flagellated), which may travel through the air or water. Fungi are the principal decomposers in ecological systems. These and other differences place fungi in a single group of related o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rozella
''Rozella'' is a fungal genus of obligate endoparasites of a variety of hosts, including Oomycota, Chytridiomycota, and Blastocladiomycota. ''Rozella'' was circumscribed by French mycologist Marie Maxime Cornu in 1872. Considered one of the earliest diverging lineages of fungi, the widespread genus contains 27 species, with the most well studied being ''Rozella allomycis''. ''Rozella'' is a member of a large clade of fungi referred to as the Cryptomycota/Rozellomycota. While some can be maintained in dual culture with the host, most have not been cultured, but they have been detected, using molecular techniques, in soil samples, and in freshwater and marine ecosystems. Zoospores have been observed, along with cysts, and the cells of some species are attached to diatoms. Morphology ''Rozella'' species grow inside their hosts. At first, the thallus is unwalled and indistinguishable from the host. As growth continues, the thallus will either form a zoosporangium using the wall of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clade
In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach to taxonomy adopted by most biological fields. The common ancestor may be an individual, a population, or a species (extinct or Extant taxon, extant). Clades are nested, one in another, as each branch in turn splits into smaller branches. These splits reflect evolutionary history as populations diverged and evolved independently. Clades are termed ''monophyletic'' (Greek: "one clan") groups. Over the last few decades, the cladistic approach has revolutionized biological classification and revealed surprising evolutionary relationships among organisms. Increasingly, taxonomists try to avoid naming Taxon, taxa that are not clades; that is, taxa that are not Monophyly, monophyletic. Some of the relationships between organisms that the molecul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Food Web
A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community. Position in the food web, or trophic level, is used in ecology to broadly classify organisms as autotrophs or heterotrophs. This is a non-binary classification; some organisms (such as carnivorous plants) occupy the role of mixotrophs, or autotrophs that additionally obtain organic matter from non-atmospheric sources. The linkages in a food web illustrate the feeding pathways, such as where heterotrophs obtain organic matter by feeding on autotrophs and other heterotrophs. The food web is a simplified illustration of the various methods of feeding that link an ecosystem into a unified system of exchange. There are different kinds of consumer–resource interactions that can be roughly divided into herbivory, carnivory, scavenging, and parasitism. Some of the organic matter eaten by heterotrophs, such as sugars, provides energy. Autotrophs and hetero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sister Group
In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and taxon B are sister groups to each other. Taxa A and B, together with any other extant or extinct descendants of their most recent common ancestor (MRCA), form a monophyletic group, the clade AB. Clade AB and taxon C are also sister groups. Taxa A, B, and C, together with all other descendants of their MRCA form the clade ABC. The whole clade ABC is itself a subtree of a larger tree which offers yet more sister group relationships, both among the leaves and among larger, more deeply rooted clades. The tree structure shown connects through its root to the rest of the universal tree of life. In cladistic standards, taxa A, B, and C may represent specimens, species, genera, or any other taxonomic units. If A and B are at the same taxono ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
