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Rasajeyna
''Rasajeyna'' is a genus of parasitic alveolates in the phylum Apicomplexa. This genus has been little studied and not much is known about these protozoa. History This genus was created in 1977 by Beesley.Beesley JE (1977) The incidence of ''Rasajeyna nannyla'' in ''Tipula paludosa'' and ''Tipula vittata'' at two sites in Northumberland England. J Invert Path 30, 249-254 Taxonomy There is one species in this genus, ''Rasajeyna nannyla''. Description These protozoa infect the midgut of ''Tipula'' species (craneflies). They are transmitted by the orofaecal route. The oocyst is somewhat unusual with a double layered wall which surrounds up to 18 sporocysts. Each sporocyst contain only a single sporozoite. Host records *''Tipula paludosa ''Tipula paludosa'', known as the European crane fly or the Leatherjacket, is a part of the ''Tipula'' genus that is made up of over 2,000 species Cosmopolitan distribution, throughout the world. ''T. paludosa'' is native to northwestern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitic
Parasitism is a close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson characterised parasites' way of feeding as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the broomrapes. There are six major parasitic strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), trophicallytransmitted parasitism (by being eaten), vector-transmitted parasitism, parasitoidism, and micropredation. One major axis of classification concerns invasiveness: an endopar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apicomplexa
The Apicomplexa (also called Apicomplexia; single: apicomplexan) are organisms of a large phylum of mainly parasitic alveolates. Most possess a unique form of organelle structure that comprises a type of non-photosynthetic plastid called an apicoplastwith an apical complex membrane. The organelle's apical shape is an adaptation that the apicomplexan applies in penetrating a host cell. The Apicomplexa are unicellular and spore-forming. Most are obligate endoparasites of animals, except '' Nephromyces'', a symbiont in marine animals, originally classified as a chytrid fungus, and the Chromerida, some of which are photosynthetic partners of corals. Motile structures such as flagella or pseudopods are present only in certain gamete stages. The Apicomplexa are a diverse group that includes organisms such as the coccidia, gregarines, piroplasms, haemogregarines, and plasmodia. Diseases caused by Apicomplexa include: * Babesiosis ('' Babesia'') * Malaria (''Plasmodium'') * Cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Midgut
The midgut is the portion of the human embryo from which almost all of the small intestine and approximately half of the large intestine develop. After it bends around the superior mesenteric artery, it is called the "midgut loop". It comprises the portion of the alimentary canal from the end of the foregut at the opening of the bile duct to the hindgut, about two-thirds of the way through the transverse colon. In addition to representing an important distinction in embryologic development, the tissues derived from the midgut additionally have distinct vascular supply and innervation patterns in the adult gastrointestinal system. In the embryo During standard human embryonic development, the midgut undergoes a process known as physiological herniation around week 6, when rapid growth forces the midgut to temporarily exit the abdominal cavity and reside in the extra-abdominal umbilical cord. At this stage, the midgut begins its initial counterclockwise rotation around the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tipula
''Tipula'' is a very large insect genus in the fly family Tipulidae (crane flies). The members of this genus are sometimes collectively called common crane flies. ''Tipula'' contains over 2,000 species located throughout the world. Like all crane flies, ''Tipula'' species have long bodies and long legs, somewhat resembling large mosquitos. Adults generally have a body length of 15–20 mm. They are usually brown with clear or brownish wings. They feed on nectar and are active throughout the year. ''Tipula'' maggots are sometimes known as "leather jackets" due to their tough skin. Technical description: Discal cell present; M3 arises from M4; all tibiae spurred Antennae with whorls of long hairs. Rs usually long; Sc ends far from base of Rs; cell 4 always petiolate; body colour usually grey, brown or dull yellow, rarely black; praescutal stripes (when present) usually dull, rarely slightly shining. Species of ''Tipula'' can be affected by fungal diseases, such as '' Zooph ... [...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, th ... [...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 o ... [...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, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tipula Paludosa
''Tipula paludosa'', known as the European crane fly or the Leatherjacket, is a part of the ''Tipula'' genus that is made up of over 2,000 species Cosmopolitan distribution, throughout the world. ''T. paludosa'' is native to northwestern Europe, however it has been distributed to the northern aspects of North America, including Canada likely due to soil dispersion and other human-mediated activities. ''T. paludosa'' has become a major pest of lawns, pastures, and hayfields, as its larvae cause significant damage to the roots, stems, and leaves of various plants, contributing to its invasiveness. Morphological identification ''Tipula paludosa'', at the adult stage, have grayish-brown bodies that are 1.5 - 2.5 cm long. ''T. paludosa'' are known to have long, thin legs. Males have shorter bodies and large wings. The pupae are 3.0 - 3.5 cm, with the mature being slightly larger at 3 - 4 cm. Females can lay about 200 - 300 eggs and appear egg-like shaped, are shiny black in color, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tipula Vittata
''Tipula vittata'' is a species of fly in the family Tipulidae. It is found in the Palearctic The Palearctic or Palaearctic is a biogeographic realm of the Earth, the largest of eight. Confined almost entirely to the Eastern Hemisphere, it stretches across Europe and Asia, north of the foothills of the Himalayas, and North Africa. Th ... .Pierre, C., (1924) Diptères : Tipulidae. Paris: Éditions Faune de France 8 159 pBibliotheque Virtuelle Numerique pdf/ref> References External links Images representing ''Tipula''at BOLDBioLib Tipulidae Insects described in 1804 Nematoceran flies of Europe Taxa named by Johann Wilhelm Meigen {{Tipulidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apicomplexa Genera
The Apicomplexa (also called Apicomplexia; single: apicomplexan) are organisms of a large phylum of mainly parasitic alveolates. Most possess a unique form of organelle structure that comprises a type of non-photosynthetic plastid called an apicoplastwith an apical complex membrane. The organelle's apical shape is an adaptation that the apicomplexan applies in penetrating a host cell. The Apicomplexa are unicellular and spore-forming. Most are obligate endoparasites of animals, except '' Nephromyces'', a symbiont in marine animals, originally classified as a chytrid fungus, and the Chromerida, some of which are photosynthetic partners of corals. Motile structures such as flagella or pseudopods are present only in certain gamete stages. The Apicomplexa are a diverse group that includes organisms such as the coccidia, gregarines, piroplasms, haemogregarines, and plasmodia. Diseases caused by Apicomplexa include: * Babesiosis ('' Babesia'') * Malaria (''Plasmodium'') * Cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Eukaryote Genera
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical system. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
