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Pythonella
''Pythonella'' is a genus of parasitic alveolates belonging to the phylum Apicomplexa. This genus was created by Ray and Das-Gupta in 1937. The type species is ''Pythonella bengalensis''. Taxonomy This genus is very poorly studied with only three known species. Life cycle This species infects the gastrointestinal tract of birds and reptiles. Its life cycle is very poorly known but it is thought that is spread by the orofaecal route. The parasite infects the cells of the gut wall. There are 16 sporocysts per oocyst (heccaidesporocystid) with 4 sporozoites (tetrazoic) in each. Once shed from the body sporulation starts in 7 to 10 days. Species in this genus have been isolated from Brazil, Costa Rica and India. Host records * ''P. bengalensis'' - ''Python'' species * ''P. scelopori'' - lizard * ''P. scleruri'' - rufous breasted leaftosser (''Sclerurus scansor The rufous-breasted leaftosser (''Sclerurus scansor'') is a species of bird in the family Furnariidae. It is fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pythonella Bengalensis
''Pythonella'' is a genus of parasitic alveolates belonging to the phylum Apicomplexa. This genus was created by Ray and Das-Gupta in 1937. The type species is ''Pythonella bengalensis''. Taxonomy This genus is very poorly studied with only three known species. Life cycle This species infects the gastrointestinal tract of birds and reptiles. Its life cycle is very poorly known but it is thought that is spread by the orofaecal route. The parasite infects the cells of the gut wall. There are 16 sporocysts per oocyst (heccaidesporocystid) with 4 sporozoites (tetrazoic) in each. Once shed from the body sporulation starts in 7 to 10 days. Species in this genus have been isolated from Brazil, Costa Rica and India. Host records * ''P. bengalensis'' - ''Python'' species * ''P. scelopori'' - lizard * ''P. scleruri'' - rufous breasted leaftosser (''Sclerurus scansor The rufous-breasted leaftosser (''Sclerurus scansor'') is a species of bird in the family Furnariidae. It is f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pythonella Scleruri
''Pythonella'' is a genus of parasitic alveolates belonging to the phylum Apicomplexa. This genus was created by Ray and Das-Gupta in 1937. The type species is ''Pythonella bengalensis''. Taxonomy This genus is very poorly studied with only three known species. Life cycle This species infects the gastrointestinal tract of birds and reptiles. Its life cycle is very poorly known but it is thought that is spread by the orofaecal route. The parasite infects the cells of the gut wall. There are 16 sporocysts per oocyst (heccaidesporocystid) with 4 sporozoites (tetrazoic) in each. Once shed from the body sporulation starts in 7 to 10 days. Species in this genus have been isolated from Brazil, Costa Rica and India. Host records * ''P. bengalensis'' - ''Python'' species * ''P. scelopori'' - lizard * ''P. scleruri'' - rufous breasted leaftosser (''Sclerurus scansor The rufous-breasted leaftosser (''Sclerurus scansor'') is a species of bird in the family Furnariidae. It is f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pythonella Scelopori
''Pythonella'' is a genus of parasitic alveolates belonging to the phylum Apicomplexa. This genus was created by Ray and Das-Gupta in 1937. The type species is ''Pythonella bengalensis''. Taxonomy This genus is very poorly studied with only three known species. Life cycle This species infects the gastrointestinal tract of birds and reptiles. Its life cycle is very poorly known but it is thought that is spread by the orofaecal route. The parasite infects the cells of the gut wall. There are 16 sporocysts per oocyst (heccaidesporocystid) with 4 sporozoites (tetrazoic) in each. Once shed from the body sporulation starts in 7 to 10 days. Species in this genus have been isolated from Brazil, Costa Rica and India. Host records * ''P. bengalensis'' - ''Python'' species * ''P. scelopori'' - lizard * ''P. scleruri'' - rufous breasted leaftosser (''Sclerurus scansor The rufous-breasted leaftosser (''Sclerurus scansor'') is a species of bird in the family Furnariidae. It is f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucoccidiorida
The Eucoccidiorida are an order of microscopic, spore-forming, single-celled parasites belonging to the apicomplexan class Conoidasida. Protozoans of this order include parasites of humans, and both domesticated and wild animals including birds. Among these parasites are the ''Toxoplasma gondii'' that cause toxoplasmosis and ''Isospora belli'', which results in isosporiasis. Definition This is the largest order in the class Conoidasida and contains those species that all undergo merogony (asexual), gametogony (sexual) and sporogony (spore formation) during their lifecycles. Genera Nineteen families, three subfamilies, and 70 genera are recognised in this order. The genera include: '' Adelea'', '' Adelina'', ''Aggregata'', '' Alveocystis'', ''Atoxoplasma'', ''Babesiosoma'', '' Barrouxia'', '' Bartazoon'', '' Besnoitia'', ''Calyptospora'', '' Caryospora'', '' Caryotropha'', '' Chagasella'', ''Choleoeimeria'', ''Cryptosporidium'', '' Crystallospora'', ''Cyclospora'', '' Cyrilia'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eimeriorina
Eimeriorina is a suborder of phylum Apicomplexa. All species in this clade are homoxenous or facultatively homoxenous. Merogony, gamogony and oocyst formation all occur within the same host. The hosts may be vertebrates or invertebrates. Erroneous identifications of species is a major problem in coccidian systematics and it is likely that some of the genera and species will be revised. Taxonomy There are 12 families, 2 subfamilies and 50 genera recognised in this suborder. The genus ''Eimeria'' with ~1500 species is the largest genus in this suborder. Notes One genus is entirely entomoxenous (parasitic on insects) — '' Barrouxia''. The taxonomic status of ''Atoxoplasma ''Atoxoplasma'' is a genus of parasitic alveolates in the phylum Apicomplexa. The species in this genus infect birds. They are spread by the orofaecal route. History This genus was created by Garnham in 1950. The history of this genus has been ...'' remains unclear. References Conoidasida SAR ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Python (genus)
''Python'' is a genus of constricting snakes in the Pythonidae Family (biology), family native to the tropics and subtropics of the Eastern Hemisphere. The name ''Python'' was proposed by François Marie Daudin in 1803 for non-venomous flecked snakes. Currently, 10 python species are recognized as Valid name (zoology), valid taxa. Three formerly considered python subspecies have been promoted, and a new species recognized. Taxonomy The Generic name (biology), generic name ''Python'' was proposed by François Marie Daudin in 1803 for non-venomous snakes with a flecked skin and a long split tongue. In 1993, seven python species were recognized as valid taxa. On the basis of phylogenetic analyses, between seven and 13 python species are recognized. Distribution and habitat In Africa, pythons are native to the tropics south of the Sahara, but not in the extreme south-western tip of southern Africa (Western Cape) or in Madagascar. In Asia, they occur from Bangladesh, Nepal, Ind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sporozoite
Apicomplexans, a group of intracellular parasites, have life cycle stages that allow them to survive the wide variety of environments they are exposed to during their complex life cycle. Each stage in the life cycle of an apicomplexan organism is typified by a ''cellular variety'' with a distinct morphology and biochemistry. Not all apicomplexa develop all the following cellular varieties and division methods. This presentation is intended as an outline of a hypothetical generalised apicomplexan organism. Methods of asexual replication Apicomplexans (sporozoans) replicate via ways of multiple fission (also known as schizogony). These ways include , and , although the latter is sometimes referred to as schizogony, despite its general meaning. Merogony is an asexually reproductive process of apicomplexa. After infecting a host cell, a trophozoite ( see glossary below) increases in size while repeatedly replicating its nucleus and other organelles. During this process, the org ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oocyst
Apicomplexans, a group of intracellular parasites, have life cycle stages that allow them to survive the wide variety of environments they are exposed to during their complex life cycle. Each stage in the life cycle of an apicomplexan organism is typified by a ''cellular variety'' with a distinct morphology and biochemistry. Not all apicomplexa develop all the following cellular varieties and division methods. This presentation is intended as an outline of a hypothetical generalised apicomplexan organism. Methods of asexual replication Apicomplexans (sporozoans) replicate via ways of multiple fission (also known as schizogony). These ways include , and , although the latter is sometimes referred to as schizogony, despite its general meaning. Merogony is an asexually reproductive process of apicomplexa. After infecting a host cell, a trophozoite ( see glossary below) increases in size while repeatedly replicating its nucleus and other organelles. During this process, the or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apicomplexa Lifecycle Stages
Apicomplexans, a group of intracellular parasites, have life cycle stages that allow them to survive the wide variety of environments they are exposed to during their complex life cycle. Each stage in the life cycle of an apicomplexan organism is typified by a ''cellular variety'' with a distinct morphology and biochemistry. Not all apicomplexa develop all the following cellular varieties and division methods. This presentation is intended as an outline of a hypothetical generalised apicomplexan organism. Methods of asexual replication Apicomplexans (sporozoans) replicate via ways of multiple fission (also known as schizogony). These ways include , and , although the latter is sometimes referred to as schizogony, despite its general meaning. Merogony is an asexually reproductive process of apicomplexa. After infecting a host cell, a trophozoite ( see glossary below) increases in size while repeatedly replicating its nucleus and other organelles. During this process, the orga ... [...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] |
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] |
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] |
