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Oreodytes Sanmarkii
''Oreodytes sanmarkii'' is a species of predaceous diving beetle in the family Dytiscidae. It has a holarctic distribution, found in aquatic habitats in Europe, northern Asia (excluding China), and North America. It has an affinity toward low-velocity currents and pebbly microhabitat substrates. It was described by Finnish entomologist Carl Reinhold Sahlberg in 1826. Subspecies There are two named subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ... of ''Oreodytes'': * ''Oreodytes sanmarkii alienus'' (Sharp, 1873) * ''Oreodytes sanmarkii sanmarkii'' (C. R. Sahlberg, 1826) References Further reading * * * * * Dytiscidae Beetles described in 1826 {{dytiscidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Predaceous Diving Beetle
The Dytiscidae – based on the Greek ''dytikos'' (δυτικός), "able to dive" – are the predaceous diving beetles, a Family (biology), family of water beetles. They occur in virtually any freshwater habitat around the world, but a few species live among leaf litter. The adults of most are between long, though much variation is seen between species. The European ''Dytiscus latissimus'' and Brazilian ''Megadytes ducalis'' are the largest, reaching up to and respectively. In contrast, the smallest is likely the Australian ''Limbodessus atypicali'' of subterranean waters, which only is about long. Most are dark brown, blackish, or dark olive (color), olive in color with golden highlights in some subfamilies. The larvae are commonly known as water tigers due to their voracious appetite. They have short, but sharp mandible (insect), mandibles and immediately upon biting, they deliver digestive enzymes into prey to suck their liquefied remains. The family includes more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dytiscidae
The Dytiscidae – based on the Greek ''dytikos'' (δυτικός), "able to dive" – are the predaceous diving beetles, a family of water beetles. They occur in virtually any freshwater habitat around the world, but a few species live among leaf litter. The adults of most are between long, though much variation is seen between species. The European ''Dytiscus latissimus'' and Brazilian ''Megadytes ducalis'' are the largest, reaching up to and respectively. In contrast, the smallest is likely the Australian ''Limbodessus atypicali'' of subterranean waters, which only is about long. Most are dark brown, blackish, or dark olive in color with golden highlights in some subfamilies. The larvae are commonly known as water tigers due to their voracious appetite. They have short, but sharp mandibles and immediately upon biting, they deliver digestive enzymes into prey to suck their liquefied remains. The family includes more than 4,000 described species in numerous genera. ... [...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] |
Microhabitat
In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical manifestation of its ecological niche. Thus "habitat" is a species-specific term, fundamentally different from concepts such as environment or vegetation assemblages, for which the term "habitat-type" is more appropriate. The physical factors may include (for example): soil, moisture, range of temperature, and light intensity. Biotic factors will include the availability of food and the presence or absence of predators. Every species has particular habitat requirements, with habitat generalist species able to thrive in a wide array of environmental conditions while habitat specialist species requiring a very limited set of factors to survive. The habitat of a species is not necessarily found in a geographical area, it can be the interio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Entomologist
Entomology () is the scientific study of insects, a branch of zoology. In the past the term "insect" was less specific, and historically the definition of entomology would also include the study of animals in other arthropod groups, such as arachnids, myriapods, and crustaceans. This wider meaning may still be encountered in informal use. Like several of the other fields that are categorized within zoology, entomology is a taxon-based category; any form of scientific study in which there is a focus on insect-related inquiries is, by definition, entomology. Entomology therefore overlaps with a cross-section of topics as diverse as molecular genetics, behavior, neuroscience, biomechanics, biochemistry, systematics, physiology, developmental biology, ecology, morphology, and paleontology. Over 1.3 million insect species have been described, more than two-thirds of all known species. Some insect species date back to around 400 million years ago. They have many kinds of intera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Reinhold Sahlberg
Carl Reinhold Sahlberg (January 22, 1779, Eura – October 18, 1860, Yläne) was a Finnish naturalist, primarily an entomologist specializing in beetles. He was the father of entomologist Reinhold Ferdinand Sahlberg (1811-1874), grandfather of entomologist Johan Reinhold Sahlberg (1845-1920), and great grandfather of Uunio Saalas (1882-1969). Biography In 1818 Carl Reinhold Sahlberg succeeded Carl Niclas Hellenius as professor of economy and natural history at Finland’s then only University in Turku (Åbo), the Academy of Åbo. In 1827 the town and the university were destroyed by fire. The remnants of the natural history collections were taken to Helsinki where the University then moved under the name of Imperial Alexander University in Finland (and eventually became University of Helsinki in 1918). Sahlberg replaced the lost collections, played a major role in establishing a new botanical garden in Helsinki, and with his pupils organised a scientific society "Societas p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oreodytes Sanmarkii
''Oreodytes sanmarkii'' is a species of predaceous diving beetle in the family Dytiscidae. It has a holarctic distribution, found in aquatic habitats in Europe, northern Asia (excluding China), and North America. It has an affinity toward low-velocity currents and pebbly microhabitat substrates. It was described by Finnish entomologist Carl Reinhold Sahlberg in 1826. Subspecies There are two named subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ... of ''Oreodytes'': * ''Oreodytes sanmarkii alienus'' (Sharp, 1873) * ''Oreodytes sanmarkii sanmarkii'' (C. R. Sahlberg, 1826) References Further reading * * * * * Dytiscidae Beetles described in 1826 {{dytiscidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subspecies
In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species have subspecies, but for those that do there must be at least two. Subspecies is abbreviated subsp. or ssp. and the singular and plural forms are the same ("the subspecies is" or "the subspecies are"). In zoology, under the International Code of Zoological Nomenclature, the subspecies is the only taxonomic rank below that of species that can receive a name. In botany and mycology, under the International Code of Nomenclature for algae, fungi, and plants, other infraspecific ranks, such as variety, may be named. In bacteriology and virology, under standard bacterial nomenclature and virus nomenclature, there are recommendations but not strict requirements for recognizing other important infraspecific ranks. A taxonomist decides whether ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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