| Argiagrion leoninum | |
|---|---|
| Scientific classification | |
| Kingdom: | |
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| Genus: | |
| Species: | A. leoninum |
| Binomial name | |
| Argiagrion leoninum Selys, 1876 | |
Argiagrion leoninum is a species of damselfly in the family Coenagrionidae. It is not endemic to Sierra Leone. It is only known from one specimen so its status is doubtful.
Genus /ˈdʒiː.nəs/ 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 nomenclature, the genus name forms the first part of the binomial species name for each species within the genus.
Biodiversity is the biological variety and variability of life on Earth. Biodiversity is a measure of variation at the genetic, species, and ecosystem level. Terrestrial biodiversity is usually greater near the equator, which is the result of the warm climate and high primary productivity. Biodiversity is not distributed evenly on Earth, and is richer in the tropics. These tropical forest ecosystems cover less than ten percent of earth's surface, and contain about ninety percent of the world's species. Marine biodiversity is usually higher along coasts in the Western Pacific, where sea surface temperature is highest, and in the mid-latitudinal band in all oceans. There are latitudinal gradients in species diversity. Biodiversity generally tends to cluster in hotspots, and has been increasing through time, but will be likely to slow in the future as a primary result of deforestation. It encompasses the evolutionary, ecological, and cultural processes that sustain life.
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" after a period of apparent absence.
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biological species. It uses a set of precise criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. With its strong scientific base, the IUCN Red List is recognized as the most authoritative guide to the status of biological diversity. A series of Regional Red Lists are produced by countries or organizations, which assess the risk of extinction to species within a political management unit.
The conservation status of a group of organisms indicates whether the group still exists and how likely the group is to become extinct in the near future. Many factors are taken into account when assessing conservation status: not simply the number of individuals remaining, but the overall increase or decrease in the population over time, breeding success rates, and known threats. Various systems of conservation status exist and are in use at international, multi-country, national and local levels as well as for consumer use.
Johannes Bündgens is auxiliary bishop of Aachen.
Karl Borsch is auxiliary bishop of Aachen.
Leoninus may refer to:
Helictotrichon, or alpine oatgrass, is a genus of perennial flowering plants in the grass family. The genus name comes from the Greek heliktos meaning twisted, and trichos meaning spine, referring to the shape of the awn.
Argiagrion is a genus of damselfly in the family Coenagrionidae. It is monotypic in that it contains only one species, Argiagrion leoninum.
The Sir John Nelthorpe School is a secondary school and sixth form on Grammar School Road and Wrawby Road in Brigg, North Lincolnshire, England. The present school was established in 1976, and has a timeline through earlier schools to that established by Sir John Nelthorpe in 1669.
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and invasive species. The International Union for Conservation of Nature (IUCN) Red List lists the global conservation status of many species, and various other agencies assess the status of species within particular areas. Many nations have laws that protect conservation-reliant species which, for example, forbid hunting, restrict land development, or create protected areas. Some endangered species are the target of extensive conservation efforts such as captive breeding and habitat restoration.
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined.
Cenangium is a genus of fungi in the family Helotiaceae. The genus contains 25 species. The type species Cenangium ferruginosum causes dieback of pines.
Amethicium is a fungal genus in the family Phanerochaetaceae. A monotypic genus, it contains the single species Amethicium rimosum, a crust fungus first reported from Tanzania in 1983. Amethicium is primarily characterized by its purple fruit body and a dimitic hyphal system. The felt-like tissue layer covering the substrate comprises a thin layer of densely intertwined skeletal hyphae.
Hyphoderma is a genus of crust fungi in the family Meruliaceae. It was circumscribed by German botanist Karl Friedrich Wilhelm Wallroth in 1833.
Leonina may refer to:
Farcimen is a genus of land snails with an operculum, terrestrial gastropod mollusks in the family Megalomastomatidae.
Heiner Wilmer, SCJ is a Roman Catholic bishop, Bishop of Hildesheim, Germany and former Superior General of the Congregation of the Priests of the Sacred Heart (Dehonians).
