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Txikispora Philomaios
''Txikispora'' is a genus of parasitic protists made up solely of the species ''Txikispora philomaios''. It is the only genus in the family Txikisporidae, which is a member of the class Filasterea and is closely related to Ministeriidae. The lineage was first described in 2022 based on specimens identified from the United Kingdom. The species represents a previously undiscovered type of life that diverged extremely early from animals and fungi. It parasitizes amphipods in the genera ''Echinogammarus'' and ''Orchestia'' and most frequently infects their hemolymph and hemocytes. Description The species goes through several stages of life. The first is as a single spherical cell, called the monokaryotic stage. It usually has a cell wall, and is characterized by a nucleus with a small nucleolus on its periphery and many small mitochondria with diverse lipoid structures. The next stage is multinucleated, and consists of four cells joined together and is somewhat larger. It appear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protist
A protist ( ) or protoctist is any eukaryotic organism that is not an animal, land plant, or fungus. Protists do not form a natural group, or clade, but are a paraphyletic grouping of all descendants of the last eukaryotic common ancestor excluding land plants, animals, and fungi. Protists were historically regarded as a separate taxonomic kingdom known as Protista or Protoctista. With the advent of phylogenetic analysis and electron microscopy studies, the use of Protista as a formal taxon was gradually abandoned. In modern classifications, protists are spread across several eukaryotic clades called supergroups, such as Archaeplastida ( photoautotrophs that includes land plants), SAR, Obazoa (which includes fungi and animals), Amoebozoa and " Excavata". Protists represent an extremely large genetic and ecological diversity in all environments, including extreme habitats. Their diversity, larger than for all other eukaryotes, has only been discovered in rece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basque Language
Basque ( ; ) is a language spoken by Basques and other residents of the Basque Country (greater region), Basque Country, a region that straddles the westernmost Pyrenees in adjacent parts of northern Spain and southwestern France. Basque is classified as a language isolate (unrelated to any other known languages), the only one in Europe. The Basques are indigenous to and primarily inhabit the Basque Country. The Basque language is spoken by 806,000 Basques in all territories. Of them, 93.7% (756,000) are in the Spanish area of the Basque Country and the remaining 6.3% (50,000) are in the French portion. Native speakers live in a contiguous area that includes parts of four Spanish provinces and the French Basque Country, three "ancient provinces" in France. Gipuzkoa, most of Biscay, a few municipalities on the northern border of Álava and the northern area of Navarre formed the core of the remaining Basque-speaking area before measures were introduced in the 1980s to stre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Described In 2022
In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion, especially in the context of rank-based (" Linnaean") nomenclature (much less so under phylogenetic nomenclature). If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated folk taxonomies. Much later, Aristotle, and later still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genome Biology And Evolution
''Genome Biology and Evolution'' is a monthly peer-reviewed open access scientific journal published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. It covers research on the interface between evolutionary biology and genomics. According to the ''Journal Citation Reports'', the journal has a 2022 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a type of journal ranking. Journals with higher impact factor values are considered more prestigious or important within their field. The Impact Factor of a journa ... of 3.3. References External links * {{Official website, https://academic.oup.com/gbe Genetics journals Oxford University Press academic journals Monthly journals English-language journals Academic journals established in 2009 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hepatopancreas
The hepatopancreas, digestive gland or midgut gland is an organ of the digestive tract of arthropods and molluscs. It provides the functions which in mammals are provided separately by the liver and pancreas, including the production of digestive enzymes, and absorption of digested food. Arthropods Arthropods, especially detritivores in the Order Isopoda, Suborder Oniscidea (woodlice), have been shown to be able to store heavy metals in their hepatopancreas. This could lead to bioaccumulation through the food chain and implications for food web destruction, if the accumulation gets high enough in polluted areas; for example, high metal concentrations are seen in spiders of the genus '' Dysdera'' which feed on woodlice, including their hepatopancreas, the major metal storage organ of isopods in polluted sites. Molluscs The hepatopancreas is a centre for lipid metabolism and for storage of lipids in gastropods Gastropods (), commonly known as slugs and snails, belong to a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemocyte (invertebrate Immune System Cell)
A hemocyte is a cell that plays a role in the immune system of invertebrates. It is found within the hemolymph. Hemocytes are phagocytes of invertebrates. Hemocytes in ''Drosophila melanogaster'' can be divided into two categories: embryonic and larval. Embryonic hemocytes are derived from head mesoderm and enter the hemolymph as circulating cells. Larval hemocytes, on the other hand, are responsible for tissue remodeling during development. Specifically, they are released during the pupa stage in order to prepare the fly for the transition into an adult and the massive associated tissue reorganization that must occur. There are four basic types of hemocytes found in fruit flies: secretory, plasmatocytes, crystal cells, and lamellocytes. Secretory cells are never released into the hemolymph and instead send out signalling molecules responsible for cell differentiation. Plasmatocytes are the hemocytes responsible for cell ingestion (phagocytosis) and represent about 95% of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carapace
A carapace is a dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tortoises, the underside is called the plastron. In botany, a carapace refers to the hard outer cover of a seed which protects the inner embryo. Crustaceans In crustaceans, the carapace functions as a protective cover over the cephalothorax (i.e., the fused head and thorax, as distinct from the abdomen behind). Where it projects forward beyond the eyes, this projection is called a rostrum. The carapace is calcified to varying degrees in different crustaceans. Zooplankton within the phylum Crustacea also have a carapace. These include Cladocera, ostracods, and isopods, but isopods only have a developed "cephalic shield" carapace covering the head. Arachnids In arachnids, the carapace is formed by the fusion of prosomal tergites into a single pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tegument (helminth)
Tegument is a term in helminthology for the outer body covering of members of the phylum Platyhelminthes. The name is derived from a Latin word ''tegumentum'' or ''tegere'', meaning "to cover". It is characteristic of flatworms including the broad groups of tapeworms and flukes. Once considered to be a non-living component, it is now known to be a dynamic cellular structure. In fact it is a living structure consisting of proteins, lipids, carbohydrates and RNA. It forms the protective layer and the host-parasite interface of the worms, serving both secretory and absorptive functions.Cheng TC (1986). ''General Parasitology, 2nd edn''. Academic Press, Division of Hardcourt Brace & Company, USA, pp. 253-2546. Structure and composition The fine structure of tegument is essentially the same in both the cestodes and trematodes. A typical tegument is 7-16 μm thick, with distinct layers. It is a syncytium consisting of multinucleated tissues with no distinct cell boundaries. The oute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melita (genus)
Melita may refer to: __NOTOC__ Places * Melite (ancient city), on the site of modern Mdina, Malta * Melita (ancient port city), near city of Melitopol in southeast Ukraine * Melita, Manitoba, Canada, a town * Melita (island), Latin name of Mljet, an island in the Dalmatia region of Croatia * Melita, Michigan, United States * Melita Island, Montana, United States People * Melita (given name) Other uses * Melita (personification), the allegorical figure of Malta ** Melita issue, a series of stamps depicting the allegorical figure ** Melita bullion coins, a series of coins depicting the allegorical figure * Melita F.C., a football (soccer) club in Malta * Melita (telecommunications company), a telecommunications company in Malta * HMS ''Melita'', two warships of the Royal Navy * Melita Stadium, Chester Hill, New South Wales, Australia * "Melita", an alternative tune to the hymn "Eternal Father, Strong to Save" * Melita, a nymph in Greek mythology - see Melite (mythology) See al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gammarus
''Gammarus'' is an amphipod crustacean genus in the family Gammaridae. It contains more than 200 described species, making it one of the most species-rich genera of crustaceans. Different species have different optimal conditions, particularly in terms of salinity, and different tolerances; '' Gammarus pulex'', for instance, is a purely freshwater species, while '' Gammarus locusta'' is estuarine, only living where the salinity is greater than 25 ‰. Species of ''Gammarus'' are the typical " scuds" of North America and range widely throughout the Holarctic. A considerable number are also found southwards into the Northern Hemisphere tropics, particularly in Southeast Asia. Species The following species are included: Four new species were found in 2018 on the Tibetan Plateau. Four more new species were described from the Chihuahuan Desert in 2021. *'' Gammarus abscisus'' G. Karaman, 1973 *'' Gammarus abstrusus'' Hou, Platvoet & Li, 2006 *'' Gammarus acalceolatus'' Pinkster, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetics
In biology, phylogenetics () is the study of the evolutionary history of life using observable characteristics of organisms (or genes), which is known as phylogenetic inference. It infers the relationship among organisms based on empirical data and observed heritable traits of DNA sequences, protein amino acid sequences, and morphology. The results are a phylogenetic tree—a diagram depicting the hypothetical relationships among the organisms, reflecting their inferred evolutionary history. The tips of a phylogenetic tree represent the observed entities, which can be living taxa or fossils. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the taxa represented on the tree. An unrooted tree diagram (a network) makes no assumption about directionality of character state transformation, and does not show the origin or "root" of the taxa in question. In addition to their use for inferring phylogenetic pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunicaraptor
''Tunicaraptor'' is a genus of marine microbial protists containing the single species ''Tunicaraptor unikontum'', discovered in 2020 from marine waters of Chile. It is a lineage of predatorial flagellates closely related to animals. It has a rare feeding structure not seen in other opisthokonts. Morphology ''Tunicaraptor unikontum'' is a small unicellular flagellate composed of oval cells similar to some fungal zoospores, with a length of 3–5 μm. It has one flagellum with a flagellar pocket, and an external envelope or ‘theca’ with long hairs of around 110 nm. Unlike other unicellular opisthokonts, ''Tunicaraptor'' cells possess a ‘mouth’, a specialized feeding structure in the anterior part of the cell. There are two centrioles: one develops a flagellum and the other rotates to the kinetosome. The mitochondrial cristae are flat and associated with lipid globules. Discovery and etymology ''Tunicaraptor unikontum'' was isolated from marine waters of the coast of Chil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
