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Acanthodraco Dewitti
''Acanthodraco'' is a monotypic genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfishes, its only species is DeWitt’s dragonfish (''Acanthodraco dewitti''). They are found in the Southern Ocean and the southeastern Pacific Ocean. ''Acanthodraco'' was first formally described as a genus by the Polish ichthyologist in 1995 when he was describing its only species ''Acanthodraco dewitti''. The type locality of ''A. dewitti'' is the South Shetland Islands. The genus name is a compound of ''acanthus'', which means “thorn” or “spine” alluding to the higher number spines on the operculum than related genera, and ''draco'' Meaning “dragon”, a common suffix in the scientific names of notothenioid fishes. The specific name honours the American ichthyologist Hugh Hamilton DeWitt, a renowned worker on notothenioid fishes. ''Acanthodraco'' is a bathydemersal fish found at depths of at least and since the original description has b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Krzysztof Edward Skóra
Krzysztof () is a Polish given name, equivalent to English ''Christopher''. The name became popular in the 15th century. Its diminutive forms include Krzyś, Krzysiek, and Krzysio; augmentative – Krzychu Individuals named Krzysztof may choose to celebrate their name day on March 15, July 25, March 2, May 21, August 20 or October 31. People with the first name Krzysztof * Krzysztof Arciszewski (1592–1656), Polish military man * Krzysztof Bednarski (born 1953), famous contemporary Polish sculptor * Krzysztof Bizacki (born 1973), Polish footballer * Krzysztof Bukalski (born 1970), Polish footballer * Krzysztof Charamsa (born 1972), Polish priest * Krzysztof Chodkiewicz, d. 1652, Polish-Lithuanian nobleman * Krzysztof Cwalina (born 1971), Polish freestyle swimmer * Krzysztof Czerwinski (Krzysztof Czerwiński) (born 1980), Polish conductor, organist and voice teacher * Krzysztof Dabrowski (Krzysztof Dąbrowski) (born 1978), Polish footballer * Krzysztof Głowacki (born 1986), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notothenioid
Notothenioidei is one of 19 suborders of the order Perciformes. The group is found mainly in Antarctic and Subantarctic waters, with some species ranging north to southern Australia and southern South America. Notothenioids constitute approximately 90% of the fish biomass in the continental shelf waters surrounding Antarctica. Evolution and geographic distribution The Southern Ocean has supported fish habitats for 400 million years; however, modern notothenioids likely appeared sometime after the Eocene epoch. This period marked the cooling of the Southern Ocean, resulting in the stable, ice-cold conditions that have persisted to the present day. Another key factor in the evolution of notothenioids is the preponderance of the Antarctic Circumpolar Current (ACC), a large, slow-moving current that extends to the seafloor and precludes most migration to and from the Antarctic region. These unique environmental conditions in concert with the key evolutionary innovation of An ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Fish 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. In contrast, an oligotypic taxon contains more than one but only a very few subordinate taxa. Examples Just as the term ''monotypic'' is used to describe a taxon including only one subdivision, the contained taxon can also be referred to as monotypic within the higher-level taxon, e.g. a genus monotypic within a family. Some examples of monotypic groups are: Plants * In the order Amborellales, there is only one family, Amborellaceae and there is only one genus, '' Amborella'', and in this genus there is only one species, namely ''Amborella trichopoda.' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terra Nova Bay
Terra Nova Bay is a bay which is often ice free, about long, lying between Cape Washington and the Drygalski Ice Tongue along the coast of Victoria Land, Antarctica. It was discovered by the British National Antarctic Expedition (known as the ''Discovery'' Expedition) under Robert Falcon Scott, 1901–1904, and named by him after '' Terra Nova'', one of the relief ships for the expedition. The Italian permanent Zucchelli Station is located in the bay, as is the Jang Bogo Station of South Korea. Relief Inlet can be found in the south west corner of the Bay. Antarctic Specially Protected Area A marine area of of the bay comprising a narrow strip of coastal waters about long, to the immediate south of Zucchelli Station, and extending to a maximum of from the shore, has been designated an Antarctic Specially Protected Area (ASPA 161). It is an important site for long-term research on the marine ecology of benthic communities. As well as rich and complex sponge and anthozoan comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Postlarvae
Crustaceans may pass through a number of larval and immature stages between hatching from their eggs and reaching their adult form. Each of the stages is separated by a moult, in which the hard exoskeleton is shed to allow the animal to grow. The larvae of crustaceans often bear little resemblance to the adult, and there are still cases where it is not known what larvae will grow into what adults. This is especially true of crustaceans which live as benthic adults (on the sea bed), more-so than where the larvae are planktonic, and thereby easily caught. Many crustacean larvae were not immediately recognised as larvae when they were discovered, and were described as new genera and species. The names of these genera have become generalised to cover specific larval stages across wide groups of crustaceans, such as ''zoea'' and ''nauplius''. Other terms described forms which are only found in particular groups, such as the ''glaucothoe'' of hermit crabs, or the ''phyllosoma'' of slippe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anal Fin
Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as seen in sharks. Apart from the tail or caudal fin, fish fins have no direct connection with the spine and are supported only by muscles. Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping. Most fish use fins when swimming, flying fish use pectoral fins for gliding, and frogfish use them for crawling. Fins can also be used for other purposes; male sharks and mosquitofish use a modified fin to deliver sperm, thresher sharks use their caudal fin to stun prey, reef stonefish have spines in their dorsal fins that inject venom, anglerfish use the first spine of their dorsal fin like a fishing rod to lu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through convergent evolution they have independently evolved external superficial fish-like body plans adapted to their marine environments, including most numerously fish, but also mammals such as cetaceans (whales, dolphins, and porpoises), and even extinct ancient marine reptiles such as various known species of ichthyosaurs. Most species have only one dorsal fin, but some have two or three. Wildlife biologists often use the distinctive nicks and wear patterns which develop on the dorsal fins of large cetaceans to identify individuals in the field. The bony or cartilaginous bones that support the base of the dorsal fin in fish are called ''pterygiophores''. Functions The main purpose of the dorsal fin is to stabilize the animal against rollin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoology Specimens
A zoological specimen is an animal or part of an animal preserved for scientific use. Various uses are: to verify the identity of a (species), to allow study, increase public knowledge of zoology. Zoological specimens are extremely diverse. Examples are bird and mammal study skins, mounted specimens, skeletal material, casts, pinned insects, dried material, animals preserved in liquid preservatives, and microscope slides. Natural history museums are repositories of zoological specimens Study skins Bird and mammal specimens are conserved as dry study skins, a form of taxidermy. The skin is removed from the animal's carcass, treated with absorbents, and filled with cotton or polyester batting (In the past plant fibres or sawdust were used). Bird specimens have a long, thin, wooden dowel wrapped in batting at their center. The dowel is often intentionally longer than the bird's body and exits at the animal's vent. This exposed dowel provides a place to handle the bird without distu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psilodraco Breviceps
''Psilodraco'' is a monotypic genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfishes, its only species is ''Psilodraco breviceps''. These fishes are native to the Southern Ocean. Taxonomy ''Psilodraco'' was first described as a genus in 1937 by the British ichthyologist John Roxborough Norman when he was describing the only species in this monotypic genus ''Psilodraco breviceps'', the type of which had been collected by the ''Discovery'' Expedition off South Georgia. The genus name compounds ''psilos'' which means "naked", a reference Norman did not explain but this species lacks any obvious scales, and ''draco'' meaning "dragon", a common suffix used in name notothenioids, while the specific name ''breviceps'' means "short head", this species having a shorter snout than '' Gymnodraco acuticeps''. Description ''Psilodraco'' has a naked, compressed body, the only scales being the imperforated scales that make up the five lateral li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circumpolar Distribution
A circumpolar distribution is any range of a taxon that occurs over a wide range of longitudes but only at high latitudes; such a range therefore extends all the way around either the North Pole or the South Pole. Taxa that are also found in isolated high-mountain environments further from the poles are said to have arctic–alpine distributions. Animals with circumpolar distributions include the reindeer, polar bear, Arctic fox, snowy owl, snow bunting, king eider, brent goose and long-tailed skua in the north, and the Weddell seal and Adélie penguin in the south. Plants with northern circumpolar distributions include ''Eutrema edwardsii'' (syn. ''Draba laevigata''), ''Saxifraga oppositifolia'', ''Persicaria vivipara'' and ''Honckenya peploides ''Honckenya peploides'', the sea sandwort (UK) or seaside sandplant (Canada), is the only species in the genus ''Honckenya'' of the plant family Caryophyllaceae. Other common names include sea chickweed, sea pimpernal, sea-beach sandwor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hugh Hamilton DeWitt
Hugh Hamilton DeWitt (28 December 1933-5 January 1995) was an American ichthyologist, marine biologist and oceanographer. DeWitt was born on 28 December 1933 in San Jose, California, son of Carl Bryce Seligman, a country doctor, and Honor Pettit Seligman, a teacher of mathematics and Latin. His surname at birth was Seligman but at his father's urging he and his brothers changed their name to DeWitt in the 1950s, a name from their mother’s side of the family, as they had encountered mistaken preconceptions while attending High Schools in the eastern United States. His brothers were the theoretical physicist Bryce Seligman DeWitt, Lloyd Lewis DeWitt (1926-1988), who joined the United States Foreign Service and Hiram Pettit DeWitt (b.1936), a teacher. He grew up largely in California, leaving to attend high school at the Putney School in Vermont. He returned to California to enrol at Stanford University, gaining his Bachelor's degree in 1955, masters in 1960 and doctorate in 1966, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specific Name (zoology)
In zoological nomenclature, the specific name (also specific epithet or species epithet) is the second part (the second name) within the scientific name of a species (a binomen). The first part of the name of a species is the name of the genus or the generic name. The rules and regulations governing the giving of a new species name are explained in the article species description. For example, the scientific name for humans is ''Homo sapiens'', which is the species name, consisting of two names: ''Homo'' is the " generic name" (the name of the genus) and ''sapiens'' is the "specific name". Historically, ''specific name'' referred to the combination of what are now called the generic and specific names. Carl Linnaeus, who formalized binomial nomenclature, made explicit distinctions between specific, generic, and trivial names. The generic name was that of the genus, the first in the binomial, the trivial name was the second name in the binomial, and the specific the proper term for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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