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Distocyclus Conirostris
''Distocyclus conirostris'' is a species of glass knifefishes found in the deep waters (3.8-28.3 m) of the Amazon basin, lower portions of the Potaro River and in major parts of the Rio Orinoco. They are typically relegated to flood basins, flooded forests and main river channels. They have been found often when gathering in small groups around vegetation, indicating a social nature. The fish has semi-translucent, glass-like pectoral and anal fins. The main body is a ground-like color with a lighter head. The largest currently recorded specimen is 34.5 cm (9.65 inches). Ecology ''Distocyclus conirostris'' has a tapering, conical snout with the top and bottom jaws being equal in length. The mouth is located terminally. The eyes are located on either side of a bilaterally compressed, elongated body and are covered by a nictitating membrane. The snout contains a uniquely small nasal capsule for the family Sternopygidae. The mouth of ''Distocyclus conirostris'' contains a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl H
Carl may refer to: *Carl, Georgia, city in USA *Carl, West Virginia, an unincorporated community * Carl (name), includes info about the name, variations of the name, and a list of people with the name *Carl², a TV series * "Carl", an episode of television series ''Aqua Teen Hunger Force'' * An informal nickname for a student or alum of Carleton College CARL may refer to: *Canadian Association of Research Libraries *Colorado Alliance of Research Libraries See also *Carle (other) *Charles *Carle, a surname *Karl (other) *Karle (other) Karle may refer to: Places * Karle (Svitavy District), a municipality and village in the Czech Republic * Karli, India, a town in Maharashtra, India ** Karla Caves, a complex of Buddhist cave shrines * Karle, Belgaum, a settlement in Belgaum ... {{disambig ja:カール zh:卡尔 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distocyclus Goajira
''Eigenmannia goajira'' is a species of glass knifefish found in the Lake Maracaibo basin in Colombia and Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in ....Dutra, G.M., Santana, C.D.d., Vari, R.P. & Wosiacki, W.B. (2014): The South American Electric Glass Knifefish Genus ''Distocyclus'' (Gymnotiformes: Sternopygidae): Redefinition and Revision. ''Copeia, 2014 (2): 345-354.'' References Sternopygidae Freshwater fish of Colombia Fish of Venezuela Fish described in 1949 {{Gymnotiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By William Ray Allen
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 int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Fauna Of Brazil
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example ''Cytisus aeolicus'' is an endemite of the Italian flora. ''Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Of Brazil
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexual Dimorphism
Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most animals and some plants. Differences may include secondary sex characteristics, size, weight, colour, markings, or behavioural or cognitive traits. These differences may be subtle or exaggerated and may be subjected to sexual selection and natural selection. The opposite of dimorphism is ''monomorphism'', which is when both biological sexes are phenotypically indistinguishable from each other. Overview Ornamentation and coloration Common and easily identified types of dimorphism consist of ornamentation and coloration, though not always apparent. A difference in coloration of sexes within a given species is called sexual dichromatism, which is commonly seen in many species of birds and reptiles. Sexual selection leads to the exaggerat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamming Avoidance Response
The jamming avoidance response is a behavior of some species of weakly electric fish. It occurs when two electric fish with wave discharges meet – if their discharge frequencies are very similar, each fish shifts its discharge frequency to increase the difference between the two. By doing this, both fish prevent jamming of their sense of electroreception. The behavior has been most intensively studied in the South American species '' Eigenmannia virescens''. It is also present in other Gymnotiformes such as ''Apteronotus'', as well as in the African species '' Gymnarchus niloticus''. The jamming avoidance response was one of the first complex behavioral responses in a vertebrate to have its neural circuitry completely specified. As such, it holds special significance in the field of neuroethology. Discovery The jamming avoidance response (JAR) was discovered by Akira Watanabe and Kimihisa Takeda in 1963. The fish they used was an unspecified species of ''Eigenmannia'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distocyclus
''Distocyclus '' is a genus of South American glass knifefishes, with one species in the Amazon basin and another in rivers in French Guiana.Meunier, F.J., Jégu, M. & Keith, P. (2014): ''Distocyclus guchereauae'' a new species of Neotropical electric fish, (Gymnotiformes: Sternopygidae), from French Guiana. ''Cybium, 38 (3): 223-230''. Species There are currently two recognized species in this genus. A third species has sometimes been recognized, but it is better placed in the genus ''Eigenmannia'' as '' E. goajira'', although its exact taxonomic position is unresolved. * '' Distocyclus conirostris'' C. H. Eigenmann & W. R. Allen, 1942 * '' Distocyclus guchereauae'' Meunier, Jégu & Keith Keith may refer to: People and fictional characters * Keith (given name), includes a list of people and fictional characters * Keith (surname) * Keith (singer), American singer James Keefer (born 1949) * Baron Keith, a line of Scottish barons ..., 2014 References Sternopygida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sternopygus
''Sternopygus'' is a genus of glass knifefishes found in tropical and subtropical South America (south to the Río de la Plata Basin), and Panama. They inhabit a wide range of freshwater habitats, from fast-flowing rivers to essentially static waters in floodplains, and shallow habitats to the bottom of deep rivers. ''S. macrurus'' will even visit brackish mangrove to feed. They are medium to large knifefish, with a maximum total length of depending on the exact species. They feed on invertebrates, small fish and fruits. Most members of Gymnotiformes are nocturnal, but ''Sternopygus'' are both nocturnal and diurnal. Species There are currently ten recognized species in this genus. * '' Sternopygus aequilabiatus'' ( Humboldt, 1805) * '' Sternopygus arenatus'' ( Eydoux & Souleyet, 1850) * '' Sternopygus astrabes'' Mago-Leccia, 1994 * '' Sternopygus branco'' Crampton, Hulen & Albert, 2004 * '' Sternopygus dariensis'' Meek & Hildebrand 1916 * '' Sternopygus macrurus'' (Bloc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Ray Allen
William is a masculine given name of Norman French origin.Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxford University Press, 2nd edition, , p. 276. It became very popular in the English language after the Norman conquest of England in 1066,All Things William"Meaning & Origin of the Name"/ref> and remained so throughout the Middle Ages and into the modern era. It is sometimes abbreviated "Wm." Shortened familiar versions in English include Will, Wills, Willy, Willie, Liam, Bill, and Billy. A common Irish form is Liam. Scottish diminutives include Wull, Willie or Wullie (as in Oor Wullie or the play ''Douglas''). Female forms are Willa, Willemina, Wilma and Wilhelmina. Etymology William is related to the German given name ''Wilhelm''. Both ultimately descend from Proto-Germanic ''*Wiljahelmaz'', with a direct cognate also in the Old Norse name ''Vilhjalmr'' and a West Germanic borrowing into Medieval Latin ''Willelmus''. The Proto-Germanic nam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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