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Hydrolycus Wallacei
''Hydrolycus'' is a genus of large dogtooth characins from tropical South America, where found in the Amazon and Orinoco basins, as well as rivers of the Guianas. The genus includes the largest dogtooth characins, reaching up to in length. They have long, pointed teeth (shorter and less extreme in ''H. wallacei'') used for spearing their prey, generally smaller fish. In a study of the stomachs of 45 individuals, most were empty, but among the remaining the prey fish were 15–50% of the length ''Hydrolycus'' itself. In 1999 two new species were described, the first in this genus in 158 years. Species There are currently four described species. * '' Hydrolycus armatus'' (Jardine, 1841) (Payara) * '' Hydrolycus scomberoides'' (G. Cuvier Jean Léopold Nicolas Frédéric, Baron Cuvier (; 23 August 1769 – 13 May 1832), known as Georges Cuvier, was a French naturalist and zoologist, sometimes referred to as the "founding father of paleontology". Cuvier was a major figure i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrolycus Scomberoides
The payara, ''Hydrolycus scomberoides'', is a species of dogtooth tetra. This predatory fish is found in the Amazon Basin in tropical South America.SeriouslyFish: Hydrolycus scomberoides.' Retrieved 31 October 2015. It was the first of four species to be described in the genus '' Hydrolycus''. Description The most noticeable feature of ''H. scomberoides'' is the two long fangs protruding from its lower jaw. These are used to impale their prey, mostly smaller fish. It typically reaches a standard length of about , but can reach up to . There are reports of far larger individuals, up to in total length and in weight, based on records by IGFA, but this likely involves confusion with the related '' H. armatus''. ''H. scomberoides'' is overall silvery with a dark spot behind the opercle and another at the lower base of the pectoral fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrolycus Armatus
''Hydrolycus armatus'' is a species of dogtooth characin found in freshwater of tropical South America. It is sometimes known as the payara,SeriouslyFish: Hydrolycus armatus.' Retrieved 13 January 2017.OPEFE: ' Retrieved 13 January 2017. a name it shares with the related '' H. scomberoides''. This predatory fish occasionally makes its way into the aquarium trade, but it requires a very large tank. In its native range it is considered a major gamefish. Distribution and habitat This species of fish is found in the Amazon, Orinoco and Essequibo basins in tropical South America. They are found in several different freshwater habitats, but often in fast-flowing water. They are typically found in deeper waters during the day. The species is locally common; in a major study of a Venezuelan floodplain river, of the collected fish were ''H. armatus'', and the species was particularly common in creeks and lagoons. At least some populations are migratory. Description ''Hydrolycus armatus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Johannes Peter Müller
In biology, a taxon (back-formation from ''taxonomy''; plural 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. 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 set forth in Carl Linnaeus's system in ''Systema Naturae'', 10th edition (1758), as well as an unpublished work by Bernard and Antoine Laurent de Jussieu. The idea of a unit-based system of biological classification was first made widely available in 1805 in the intro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cynodontidae
Cynodontidae, also known as dogtooth characins or vampire tetras, are a family of predatory, characiform freshwater fishes from South America. This group is not very diverse, and includes only five genera and 14 species. Most of what is known about this family is from the members of the subfamily Cynodontinae, which includes the largest species of this family, up to . The members of subfamily Roestinae only reach up to . and are less known. Physical characteristics Cynodontidae are elongated in shape with a silvery or grey colour and an upturned mouth. Some species have a hunchbacked appearance. The family names (both scientific and common) derive from the long and well-developed canines which are used to spear their prey, mainly other fish. Their pectoral fins are also expanded. The maximum length reached is . Distribution and habitat These fish live in midlevel to surface waters of rivers, lakes, and flooded forests. Most species of this family originate from the Orinoco and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrolycus Wallacei
''Hydrolycus'' is a genus of large dogtooth characins from tropical South America, where found in the Amazon and Orinoco basins, as well as rivers of the Guianas. The genus includes the largest dogtooth characins, reaching up to in length. They have long, pointed teeth (shorter and less extreme in ''H. wallacei'') used for spearing their prey, generally smaller fish. In a study of the stomachs of 45 individuals, most were empty, but among the remaining the prey fish were 15–50% of the length ''Hydrolycus'' itself. In 1999 two new species were described, the first in this genus in 158 years. Species There are currently four described species. * '' Hydrolycus armatus'' (Jardine, 1841) (Payara) * '' Hydrolycus scomberoides'' (G. Cuvier Jean Léopold Nicolas Frédéric, Baron Cuvier (; 23 August 1769 – 13 May 1832), known as Georges Cuvier, was a French naturalist and zoologist, sometimes referred to as the "founding father of paleontology". Cuvier was a major figure i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geraldo Mendes Dos Santos
Geraldo may refer to: * Geraldo (bandleader) (1904–1974), English bandleader * ''Geraldo'' (talk show), a daytime television tabloid talk show ** Geraldo Rivera, American television personality and host of ''Geraldo'' * Geraldo Rocha Pereira (born 1994), Brazilian footballer * Geraldo Moreira da Silva Júnior (born 1974), Brazilian footballer * Geraldo (footballer, born 1991), Angolan footballer * Geraldo (name), a given name See also *Giraldo Giraldo is a Spanish and Italian surname. Notable people with the surname include: * Alejandra Giraldo (born 1984), Colombian journalist, newscaster and social commentator * Andrés Giraldo (born 1989), a Colombian footballer * Blas Giraldo Reyes ... * Heraldo * * {{disambiguation, hn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mônica De Toledo-Piza Ragazzo
Monica (Portuguese language, Portuguese: ''Mônica'') is a Brazil, Brazilian fictional character and Mauricio de Sousa's best-known creation. Introduced in 1963, she serves as the main protagonist and title character of the ''Monica and Friends'' (''Turma da Mônica'') comic book series and media franchise. De Sousa based the character on his second daughter, also named Mônica Sousa, Monica, with whom the fictional character shares some physical characteristics. In her first appearances, she was a supporting character to Jimmy Five, but was gradually made the principal character. An eponymous comic book series began publication from 1970. Concept and creation Monica was based on Mauricio de Sousa's daughter in childhood. The reason for her creation was due to a complaint of the lack of female characters in Mauricio comics. At that time, newspaper strips of Blu (comic strip character), Blu and Jimmy Five were produced. When Monica made her first appearance was in a strip of J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrolycus Tatauaia
''Hydrolycus tatauaia'' is a species of dogtooth characin found in the Amazon, Orinoco and Essequibo basins in tropical South America. Adults mainly occur in deep and/or fast-flowing rivers. It is migratory, moving upstream to breed in November–April. Like other '' Hydrolycus'' species, ''H. tatauaia'' has long pointed canine teeth that are used to spear their prey, generelly smaller fish. The body and head are silvery, and there is a vertically elongated dark spot behind the opercle. The tail is reddish to orange. The species name ''tatauaia'' is of Tupi origin and means "fire tail". It reaches up to in total length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish ... and in weight. This predatory fish occasionally makes its way into the aquarium trade, but it requires a very ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georges Cuvier
Jean Léopold Nicolas Frédéric, Baron Cuvier (; 23 August 1769 – 13 May 1832), known as Georges Cuvier, was a French natural history, naturalist and zoology, zoologist, sometimes referred to as the "founding father of paleontology". Cuvier was a major figure in natural sciences research in the early 19th century and was instrumental in establishing the fields of comparative anatomy and paleontology through his work in comparing living animals with fossils. Cuvier's work is considered the foundation of vertebrate paleontology, and he expanded Linnaean taxonomy by grouping classes into phylum, phyla and incorporating both fossils and living species into the classification. Cuvier is also known for establishing extinction as a fact—at the time, extinction was considered by many of Cuvier's contemporaries to be merely controversial speculation. In his ''Essay on the Theory of the Earth'' (1813) Cuvier proposed that now-extinct species had been wiped out by periodic catastrophi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sir William Jardine, 7th Baronet
Sir William Jardine, 7th Baronet of Applegarth FRS FRSE FLS FSA (23 February 1800 – 21 November 1874) was a Scottish naturalist. He is known for his editing of a long series of natural history books, ''The Naturalist's Library''. Life and work Jardine was born on 23 February 1800 at 28 North Hanover Street in Edinburgh, the son of Sir Alexander Jardine, 6th baronet of Applegarth and his wife, Jane Maule. He was educated in both York and Edinburgh then studied medicine at Edinburgh University. From 1817 to 1821 he lodged with Rev Dr Andrew Grant at James Square, an arrangement made by his father. Grant was minister of St Andrew's Church on George Street. In his early years, aged only 25, he was elected a fellow of the Royal Society of Edinburgh his proposer being Sir David Brewster. He was a co-founder of the Berwickshire Naturalists' Club, and contributed to the founding of the Ray Society. He was "keenly addicted to field-sports, and a master equally of the rod a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
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. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
