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Andeancistrus
''Andeancistrus'' is a genus of Loricariidae, suckermouth armored catfishes native to South America. This genus is diagnosable from all other members of the ''Chaetostoma'' group by having a fully plated snout, lacking cheek odontodes that extend past the Operculum (fish), opercular flap, and by having eight branched dorsal fin Fish fin, rays.Lujan, N.K., Meza-Vargas, V. & Barriga-Salazar, R. (2015): Two New ''Chaetostoma'' Group (Loricariidae: Hypostominae) Sister Genera from Opposite Sides of the Andes Mountains in Ecuador, with the Description of One New Species. ''Copeia, 103 (3): 651-663.'' Species There are currently 2 recognized species in this genus: * ''Andeancistrus eschwartzae'' Nathan Keller Lujan, Lujan, Sonia Vanessa Meza-Vargas, Meza-Vargas & Ramiro Edmundo Barriga-Salazar, Barriga-S., 2015 * ''Andeancistrus platycephalus'' (George Albert Boulenger, Boulenger, 1898) References Ancistrini Catfish of South America Taxa named by Nathan Keller Lujan Taxa name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andeancistrus Platycephalus
''Andeancistrus platycephalus'' is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Zamora River basin, which is part of the upper Marañón River drainage in Ecuador. The species can reach in total length. The species was in the genus ''Cordylancistrus'' until a 2015 reclassification, when Nathan K. Lujan, Vanessa Meza-Vargas, and Ramiro Barriga-Salazar constructed the genera ''Andeancistrus'' and ''Transancistrus''.'' References Ancistrini Taxa named by George Albert Boulenger Fish described in 1898 Catfish of South America {{Hypostominae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andeancistrus Eschwartzae
''Andeancistrus eschwartzae'' is a species of catfish in the family Loricariidae. It is a freshwater fish native to South America, where it occurs in the Amundalo River, which is part of the Pastaza River drainage basin in Ecuador Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contain .... The species reaches 14.4 cm (5.7 inches) SL and Etymology It is named after Eugenia Schwartz, who is noted to have supported the research needed to describe the species.Lujan, N.K., Meza-Vargas, V. & Barriga-Salazar, R. (2015): Two New ''Chaetostoma'' Group (Loricariidae: Hypostominae) Sister Genera from Opposite Sides of the Andes Mountains in Ecuador, with the Description of One New Species. ''Copeia, 103 (3): 651-663.'' References Ancistrini Taxa named by Nathan Keller Lujan Taxa named by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancistrini
Ancistrini is a tribe of catfishes of the family Loricariidae. Most are restricted to tropical and subtropical South America, but there are also several genus ('' Ancistrus'', '' Chaetostoma'', '' Hemiancistrus'' and '' Lasiancistrus'') in southern Central America. Taxonomy Ancistrini have previously been considered a loricariid subfamily. However, the subfamily Hypostominae would be paraphyletic if Ancistrinae continued to be recognized. To continue recognizing the monophyly of this group while returning it to Hypostominae, Hypostominae was broken into several tribes. Pterygoplichthyini is sister to the tribe Ancistrini, which shares the derived presence of an evertible patch of plates on the cheek. Description Most Ancistrini species (except for some '' Pseudancistrus'' and '' Spectracanthicus'') can be separated from all other loricariids except the Pterygoplichthyini by the presence of evertible cheek plates with hypertrophied odontode Odontodes, or dermal teeth, are hard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nathan Keller Lujan
Nathan or Natan may refer to: People and biblical figures *Nathan (given name), including a list of people and characters with this name *Nathan (surname) *Nathan (prophet), a person in the Hebrew Bible *Nathan (son of David), a biblical figure, son of King David and Bathsheba *Nathan of Gaza, a charismatic figure who spread the word of Sabbatai Zevi *Starboy Nathan, a British singer who used the stage name "Nathan" from 2006 to 2011 * Nathan (footballer, born 1994), Brazilian winger Nathan Athaydes Campos Ferreira * Nathan (footballer, born 1995), Brazilian centre back Nathan Raphael Pelae Cardoso *Nathan (footballer, born 1996), Brazilian midfielder Nathan Allan de Souza * Nathan (footballer, born May 1999), Brazilian forward Nathan Crepaldi da Cruz *Nathan (footballer, born August 1999), Brazilian forward Nathan Palafoz de Sousa *Nathan (footballer, born 2001), Brazilian right back Nathan Santos de Araújo *Nathan (footballer, born 2002), Brazilian right back Nathan Gabriel d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found in most fish, in mammals such as whales, and in extinct ancient marine reptiles such as ichthyosaurs. Most 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 whales to identify individuals in the field. The bones or cartilages that support the dorsal fin in fish are called pterygiophores. Functions The main purpose of the dorsal fin is usually to stabilize the animal against rolling and to assist in sudden turns. Some species have further adapted their dorsal fins to other uses. The sunfish uses the dorsal fin (and the anal fin Fins are moving appendages protruding from the body of fish that interact with water to ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Nathan Keller Lujan
In biology, a taxon (back-formation from ''taxonomy''; : 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, especially in the context of rank-based (" Linnaean") nomenclature (much less so under phylogenetic nomenclature). 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 presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated folk taxonomies. Much later, Aristotle, and later still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catfish Of South America
Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Catfish are named for their prominent barbels, which resemble a cat's whiskers, though not all catfish have prominent barbels or "whiskers", with some seemingly not having them. Siluriformes as a whole are scale-less, with neither the armour-plated nor the naked species having scales. This order of fish are defined by features of the skull and swimbladder. Catfish range in size and behavior from the three largest species alive, the Mekong giant catfish from Southeast Asia, the wels catfish of Eurasia, and the piraíba of South America, to detritivorous and scavenging bottom feeders, down to tiny ectoparasitic species known as the candirus. In the Southern United States, catfish species may be known by a variety of slang names, such as "mud cat", "polliwogs", or "chuckleheads". These nicknames are not standardized, so one area may call a bullhead catfish by the nic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Albert Boulenger
George Albert Boulenger (19 October 1858 – 23 November 1937) was a Belgian-British zoologist who described and gave scientific names to over 2,000 new animal species, chiefly fish, reptiles, and amphibians. Boulenger was also an active botanist during the last 30 years of his life, especially in the study of roses. Life Boulenger was born in Brussels, Belgium, the only son of Gustave Boulenger, a Belgian public notary, and Juliette Piérart, from Valenciennes. He graduated in 1876 from the Free University of Brussels (1834–1969), Free University of Brussels with a degree in natural sciences, and worked for a while at the Royal Belgian Institute of Natural Sciences, Brussels, as an assistant naturalist studying amphibians, reptiles, and fishes. He also made frequent visits during this time to the ''National Museum of Natural History (France), Muséum national d'Histoire naturelle'' in Paris and the Natural History Museum, London, British Museum in London. Boulenger develop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish ( Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish ( Chondrichthyes) and jawless fish ( Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operculum (fish)
The operculum is a series of bones found in bony fish and chimaeras that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding. Anatomy The opercular series contains four bone segments known as the preoperculum, suboperculum, interoperculum and operculum. The preoperculum is a crescent-shaped structure that has a series of ridges directed posterodorsally to the organism’s canal pores. The preoperculum can be located through an exposed condyle that is present immediately under its ventral margin; it also borders the operculum, suboperculum, and interoperculum posteriorly. The suboperculum is rectangular in shape in most bony fish and is located ventral to the preoperculum and operculum components. It is the thinnest bone segment out of the opercular series and is located directly above the gills. The interoperculum is triangular shaped and borders the suboperculum posterodorsally and the preoperculum anterodo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sonia Vanessa Meza-Vargas
Sonia, Sonja or Sonya, a name of Greek origin meaning wisdom, may refer to: People * Sonia (name), a feminine given name (lists people named, Sonia, Sonja and Sonya) :* Sonia (actress), Indian film actress in Malayalam and Tamil films :* Sonia (singer), British pop singer Sonia Evans :* Sonia, pen name of Ottavia Vitagliano (1894–1975), an Italian writer :* Sonia, code-name of Ursula Kuczynski, also known as Beurton, a spy for the USSR :*Queen Sonja of Norway (born 1937) :* Sonia Ben Ammar, French fashion model, actress and singer known mononymously as SONIA * Sonia people, an ethnic group on the Great Papuan Plateau of Papua New Guinea Other * Sonia, the allied code name for the Mitsubishi Ki-51, Japanese WW2 era bomber * SONIA, Sterling OverNight Index Average, a financial market rate * ''Sonia'' (album), a 1991 album by Sonia Evans * ''Sonia'' (1921 film), a British silent film * ''Sonia'' (1986 film), a Canadian drama film * ''Sonja'' (film), a 1943 Swedish film ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Odontode
Odontodes, or dermal teeth, are hard structures found on the external surfaces of animals or near internal openings. They consist of a soft pulp surrounded by dentine and covered by a mineralized substance such as enamel, a structure similar to that of teeth. They generally do not have the same function as teeth, and are not replaced the same way teeth are in most fish. In some animals (notably catfish), the presence or size of odontodes can be used in determining the sex. Odontodes typically cover the body of chondrichthyans (cartilaginous fishes), while mineralized dermal scales are characteristic of bony fishes. During the evolution to bony fishes, ancestral odontodes have been modified to become dermal scales, including elasmoid scales in teleosteans. Etymology The name comes from the Greek "''odous, gen. odontos''" meaning tooth. Images Aquino et al. (2001) show scanning electron microscope images of odontodes on a catfish. See also * Dermal denticle A fish sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
