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Xestia Sternecki
''Xestia'' is a genus of noctuid moths (family Noctuidae). They are the type genus of the tribe Xestiini in subfamily Noctuinae, though some authors merge this tribe with the Noctuini. Species in this genus are commonly known as "clays", " darts" or " rustics", but such names are commonplace among Noctuidae. ''Xestia'' moths have a wide distribution, though they most prominently occur in the Holarctic. With almost 200 species included at one time, ''Xestia'' was something of a "wastebin genus". But almost half of the traditional species are now placed elsewhere (see below), and some of the remaining ones are liable to be assigned to another genus also. On the other hand, new moths that probably do belong in this genus are still being discovered (e.g. '' X. hypographa'', which led to the 2002 transfer of '' X. ornata'' from '' Eugraphe'' to here). Thus, unless there are drastic taxonomic changes in the future, ''Xestia'' is likely to remain one of the larger noctuine genera. Ec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xestia Ochreago
:''The ''Phalaena (Noctua) ochreago'' invalidly described by Esper in 1791 is '' Tiliacea citrago. ''Xestia ochreago'' is a moth of the family Noctuidae. Description ''Xestia ochreago'' has a wingspan of 37–39 mm. The forewings are basically yellowish or pale brown, with transversal wavy dark brown lines and with yellowish rings surrounded by darker fine lines. At the lower rim of the kidney shaped ring there is a characteristic brownish stain. The hind wings are greyish or pale brown. Biology Adults are mainly day-active and are on wing from the end of June to August in one generation per year. Adults are found on flowers of ''Scabiosa'', ''Adenostyles'' and ''Cirsium spinosissimum''. The larvae feed on various plants, including ''Verbascum'' and ''Tussilago farfara''. This species overwinters as a caterpillar. Distribution and habitat This species is found in the Mediterranean and Asia. In Europe it is found in the mountains of Spain, the mountains in the eastern Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holarctic
The Holarctic realm is a biogeographic realm that comprises the majority of habitats found throughout the continents in the Northern Hemisphere. It corresponds to the floristic Boreal Kingdom. It includes both the Nearctic zoogeographical region (which covers most of North America), and Alfred Wallace's Palearctic zoogeographical region (which covers North Africa, and all of Eurasia except for Southeast Asia, the Indian subcontinent, the southern Arabian Peninsula). These regions are further subdivided into a variety of ecoregions. Many ecosystems and the animal and plant communities that depend on them extend across a number of continents and cover large portions of the Holarctic realm. This continuity is the result of those regions’ shared glacial history. Major ecosystems Within the Holarctic realm, there are a variety of ecosystems. The type of ecosystem found in a given area depends on its latitude and the local geography. In the far north, a band of Arctic tundra en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecosystem
An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the system through photosynthesis and is incorporated into plant tissue. By feeding on plants and on one another, animals play an important role in the movement of matter and energy through the system. They also influence the quantity of plant and microbial biomass present. By breaking down dead organic matter, decomposers release carbon back to the atmosphere and facilitate nutrient cycling by converting nutrients stored in dead biomass back to a form that can be readily used by plants and microbes. Ecosystems are controlled by external and internal factors. External factors such as climate, parent material which forms the soil and topography, control the overall structure of an ecosystem but are not themselves influenced by the ecosystem. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taiga
Taiga (; rus, тайга́, p=tɐjˈɡa; relates to Mongolic and Turkic languages), generally referred to in North America as a boreal forest or snow forest, is a biome characterized by coniferous forests consisting mostly of pines, spruces, and larches. The taiga or boreal forest has been called the world's largest land biome. In North America, it covers most of inland Canada, Alaska, and parts of the northern contiguous United States. In Eurasia, it covers most of Sweden, Finland, much of Russia from Karelia in the west to the Pacific Ocean (including much of Siberia), much of Norway and Estonia, some of the Scottish Highlands, some lowland/coastal areas of Iceland, and areas of northern Kazakhstan, northern Mongolia, and northern Japan (on the island of Hokkaidō). The main tree species, depending on the length of the growing season and summer temperatures, vary across the world. The taiga of North America is mostly spruce, Scandinavian and Finnish taiga consists of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tundra
In physical geography, tundra () is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. The term ''tundra'' comes through Russian (') from the Kildin Sámi word (') meaning "uplands", "treeless mountain tract". There are three regions and associated types of tundra: Arctic tundra, alpine tundra, and Antarctic tundra. Tundra vegetation is composed of dwarf shrubs, sedges, grasses, mosses, and lichens. Scattered trees grow in some tundra regions. The ecotone (or ecological boundary region) between the tundra and the forest is known as the tree line or timberline. The tundra soil is rich in nitrogen and phosphorus. The soil also contains large amounts of biomass and decomposed biomass that has been stored as methane and carbon dioxide in the permafrost, making the tundra soil a carbon sink. As global warming heats the ecosystem and causes soil thawing, the permafrost carbon cycle accelerates and releases much of these soil-contained g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latitude
In geography, latitude is a coordinate that specifies the north– south position of a point on the surface of the Earth or another celestial body. Latitude is given as an angle that ranges from –90° at the south pole to 90° at the north pole, with 0° at the Equator. Lines of constant latitude, or ''parallels'', run east–west as circles parallel to the equator. Latitude and ''longitude'' are used together as a coordinate pair to specify a location on the surface of the Earth. On its own, the term "latitude" normally refers to the ''geodetic latitude'' as defined below. Briefly, the geodetic latitude of a point is the angle formed between the vector perpendicular (or ''normal'') to the ellipsoidal surface from the point, and the plane of the equator. Background Two levels of abstraction are employed in the definitions of latitude and longitude. In the first step the physical surface is modeled by the geoid, a surface which approximates the mean sea level over the ocean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xestia Triangulum Larva
''Xestia'' is a genus of noctuid moths (family Noctuidae). They are the type genus of the tribe Xestiini in subfamily Noctuinae, though some authors merge this tribe with the Noctuini. Species in this genus are commonly known as "clays", "darts" or " rustics", but such names are commonplace among Noctuidae. ''Xestia'' moths have a wide distribution, though they most prominently occur in the Holarctic. With almost 200 species included at one time, ''Xestia'' was something of a "wastebin genus". But almost half of the traditional species are now placed elsewhere (see below), and some of the remaining ones are liable to be assigned to another genus also. On the other hand, new moths that probably do belong in this genus are still being discovered (e.g. '' X. hypographa'', which led to the 2002 transfer of '' X. ornata'' from ''Eugraphe'' to here). Thus, unless there are drastic taxonomic changes in the future, ''Xestia'' is likely to remain one of the larger noctuine genera. Ecolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eyespot (mimicry)
An eyespot (sometimes ocellus) is an eye-like marking. They are found in butterflies, reptiles, cats, birds and fish. Eyespots could be explained in at least three different ways. They may be a form of mimicry in which a spot on the body of an animal resembles an eye of a different animal, to deceive potential predator or prey species. They may be a form of self-mimicry, to draw a predator's attention away from the prey's most vulnerable body parts. Or they may serve to make the prey appear inedible or dangerous. Eyespot markings may play a role in intraspecies communication or courtship; the best-known example is probably the eyespots on a peacock's display feathers. The pattern-forming biological process (morphogenesis) of eyespots in a wide variety of animals is controlled by a small number of genes active in embryonic development, including the genes called Engrailed, Distal-less, Hedgehog, Antennapedia, and the Notch signaling pathway. Artificial eyespots have been sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crypsis
In ecology, crypsis is the ability of an animal or a plant to avoid observation or detection by other animals. It may be a predation strategy or an antipredator adaptation. Methods include camouflage, nocturnality, subterranean lifestyle and mimicry. Crypsis can involve visual, olfactory (with pheromones) or auditory concealment. When it is visual, the term cryptic coloration, effectively a synonym for animal camouflage, is sometimes used, but many different methods of camouflage are employed by animals or plants. Overview There is a strong evolutionary pressure for animals to blend into their environment or conceal their shape, for prey animals to avoid predators and for predators to be able to avoid detection by prey. Exceptions include large herbivores without natural enemies, brilliantly colored birds that rely on flight to escape predators, and venomous or otherwise powerfully armed animals with warning coloration. Cryptic animals include the tawny frogmouth (feather pat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomy (biology)
In biology, taxonomy () is the scientific study of naming, defining ( circumscribing) and classifying groups of biological organisms based on shared characteristics. Organisms are grouped into taxa (singular: taxon) and these groups are given a taxonomic rank; groups of a given rank can be aggregated to form a more inclusive group of higher rank, thus creating a taxonomic hierarchy. The principal ranks in modern use are domain, kingdom, phylum (''division'' is sometimes used in botany in place of ''phylum''), class, order, family, genus, and species. The Swedish botanist Carl Linnaeus is regarded as the founder of the current system of taxonomy, as he developed a ranked system known as Linnaean taxonomy for categorizing organisms and binomial nomenclature for naming organisms. With advances in the theory, data and analytical technology of biological systematics, the Linnaean system has transformed into a system of modern biological classification intended to reflect the evolu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eugraphe
''Eugraphe'' is a genus of noctuid moths (family Noctuidae). They belong to the tribe Xestiini of the typical noctuid subfamily Noctuinae, though some do not separate this tribe and include the genus in the Noctuini. It is closely related to '' Anagnorisma'', ''Coenophila'' and '' Eugnorisma'', and as it seems most closely to the first of these (see also below). The geographic range is Palearctic, north of the Alpides but including the Caucasus, and between the Arctic and the arid lands of Central Asia.Varga & Ronkay (2002) Serving for some time to assemble some more or less superficially Xestiini, more recently most species have been moved elsewhere, e.g. to the newly established ''Goniographa'' and ''Pseudohermonassa'', to the revalidated ''Ammogrotis'', ''Coenophila'' and ''Hypernaenia'' (which had all been included in ''Eugraphe'' earlierPitkin & Jenkins (2004), and see references in Savela (2009)), or to the long-known ''Xestia'' (though placement there is still provisional) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xestia Ornata
''Xestia ornata'' is a moth of the family Noctuidae. It is found from the northern Tien-Shan Mountains through the Pamirs and Hissar- Darwaz system to eastern Afghanistan (Nuristan). The wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the other wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan of ... is 32–37 mm. External linksA Revision of the Palaearctic species of the Eugraphe (Hübner, 1821-1816) Generic complex. Parti. The genera Eugraphe and Goniographa (Lepidoptera, Noctuidae) ornata Moths of Asia {{Xestia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
