|
Bagrid Catfish
The Bagridae are a family of catfish that are native to Africa ('' Bagrus'') and Asia (all other genera) from Japan to Borneo. It includes about 245 species. These fish are commonly known as naked catfishes or bagrid catfishes. Many large bagrids are important as a source of food. Some species are also kept as aquarium fishes. Physical characteristics The dorsal fin is preceded by a spine. The adipose fin is present and can have a relatively long base in some species. The pectoral fin spine can be serrated. The body is completely naked (they have no scales). The maximum length is about . Fishes of the family Bagridae have four pairs of well-developed barbels covered by a layer of taste bud-enriched epithelium. Taxonomy The taxonomy of this family has changed rapidly. Nelson (2006) comments how "the family is very different from that recognized in Nelson (1994)". Claroteidae and Austroglanididae contain species that were previously bagrids. Auchenoglanididae is considered by some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene
The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "dawn") and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope Carbon-13, 13C in the atmosphere was exceptionally low in comparison with the more common isotope Carbon-12, 12C. The end is set at a major extinction event called the ''Grande Coupure'' (the "Great Break" in continuity) or the Eocene–Oligocene extinction event, which may be related to the impact of one or more large bolides in Popigai impact structure, Siberia and in what is now ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelteobagrus
''Pelteobagrus'' is a genus of bagrid catfishes found in eastern Asia. The taxonomy of this genus is unclear and many authorities treat it as a junior synonym of '' Tachysurus'' and the type species of the genus, is ''Silurus calvarius'' which is a synonym of '' Tachysurus fulvidraco''. Species There are currently four described species in this genus: * '' Pelteobagrus eupogon'' ( Boulenger, 1892) * '' Pelteobagrus intermedius'' (Nichols Nichols may refer to: People *Nichols (surname) *Nichol, a surname Places Canada * Nichols Islands, Nunavut United States * Nichols, California, an unincorporated community * Nichols Canyon, Los Angeles, California * Nichols, Connecticut * Nich ... & C. H. Pope, 1927) * '' Pelteobagrus nudiceps'' ( Sauvage, 1883) * '' Pelteobagrus tonkinensis'' V. H. Nguyễn, 2005 * '' Pelteobagrus ussuriensis'' ( Dybowski, 1872) (Ussuri catfish) References Bagridae Fish of Asia Catfish genera Freshwater fish genera Taxa named by Pieter Bleeker ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tachysurus
''Tachysurus'' is a genus of bagrid catfishes found in eastern Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an are ... and as a fossil in Africa. The currently recognized species in this genus are: * '' Tachysurus argentivittatus'' ( Regan, 1905) * '' Tachysurus brashnikowi'' ( L. S. Berg, 1907) (Brazhnikov's catfish) * '' Tachysurus dumerili'' ( Richardson, 1846) (Chinese longsnout catfish) →''Leiocassis longirostris'' is a synonym. * '' Tachysurus fulvidraco'' ( J. Richardson, 1846) (yellowhead catfish or Korean bullhead) * '' Tachysurus herzensteini'' (L. S. Berg, 1907) (Herzenstein's catfish) * '' Tachysurus hoi'' ( Pellegrin & P. W. Fang, 1940) * '' Tachysurus longispinalis'' ( V. H. Nguyễn, 2005) * '' Tachysurus nitidus'' ( Sauvage & Dabry de Thiersant, 1874) * '' Tachy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sundolyra
''Sundolyra latebrosa'' is a species of catfish found in Sumatra. This species occurs the Kreung Babah Rot drainage in northwestern Sumatra. This species is the only known member of its genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com .... References Bagridae Fish described in 2015 {{Bagridae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sperata
''Sperata'' is a genus of bagrid catfishes. Species There are currently six recognized species in this genus: * ''Sperata acicularis'' Ferraris & Runge, 1999 * ''Sperata aor'' ( F. Hamilton, 1822) - Long-whiskered catfish * ''Sperata aorella'' ( Blyth, 1858) *''Sperata aorides'' *''Sperata lamarrii'' * ''Sperata seenghala'' (Sykes, 1839) - Giant river-catfish Distribution Species of ''Sperata'' are found in southern Asia from Afghanistan to Thailand where they are found in a wide variety of water bodies. Relationship to humans At least two of the ''Sperata'' species (''S. aor'' & ''S. seenghala'') are sport fish as well as being important food fish Food is any substance consumed by an organism for nutritional support. Food is usually of plant, animal, or fungal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingest .... References Bagridae Fish of Asia Catfish genera Freshwater fish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rita (fish)
''Rita'' is a genus of fish in the family Bagridae found in South Asia. These species have a single pair of mandibular barbels, an elongated Weberian apparatus firmly sutured to the basioccipital and the sensory canal on the posttemporal enclosed with bone.Ng, H.H. (2004)''Rita macracanthus'', a new riverine catfish (Teleostei: Bagridae) from South Asia.''Zootaxa, 568: 1–12.'' Species There are currently 7 recognized species in this genus: * '' Rita bakalu'' K. K. Lal, Dwivedi & R. K. Singh, 2016 Lal, K.K., Dwivedi, A.K., Singh, R.K., Mohindra, V., Chandra, S., Gupta, B.K., Dhawan, S. & Jena, J. (2016): A new bagrid catfish species, ''Rita bakalu'' (Siluriformes: Bagridae), from the Godavari River basin, India. ''Hydrobiologia, 790 (1): 67–81.'' * ''Rita chrysea'' F. Day, 1877 * '' Rita gogra'' (Sykes, 1839) * ''Rita kuturnee'' (Sykes, 1839) * ''Rita macracanthus'' H. H. Ng, 2004 * ''Rita rita'' ( F. Hamilton, 1822) * ''Rita sacerdotum ''Rita sacerdotum'', the Salwee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Extinction")