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Hypophthalmus
''Hypophthalmus'' is a genus of long-whiskered catfishes native to freshwater in tropical and subtropical South America. Species There are currently 4 recognized species in this genus: * ''Hypophthalmus edentatus'' Johann Baptist von Spix, Spix & Louis Agassiz, Agassiz, 1829 (Highwaterman catfish) * ''Hypophthalmus fimbriatus'' Rudolf Kner, Kner, 1857 * ''Hypophthalmus marginatus'' Achille Valenciennes, Valenciennes, 1840 * ''Hypophthalmus oremaculatus'' Alberto Nani Caputo, Nani & María Luisa Fuster de Plaza, Fuster, 1947 Taxonomy This genus has been classified within its own family Hypophthalmidae. However, it has since been reclassified as a member of Pimelodidae; it is thought to be most closely related to ''Parapimelodus''. Distribution ''H. edentatus'' is found in the Amazon basin, Amazon and Orinoco River basins and Atlantic coastal rivers of Guyana and Suriname. ''H. fimbriatus'' inhabits the Amazon River at Santarém, Brazil, Santarém and Rio Negro (Amazon), Rio Neg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypophthalmus Fimbriatus
The Dolphin Catfish, (''Hypophthalmus fimbriatus''), is a species of demersal potamodromous catfish of the family Pimelodidae that is native to Santarém and the Negro River basin of Brazil and Venezuela. Description It grows to a length of 30.0 cm. Clearly distinguished by elongate, flat and thick mental barbels. Caudal fin deeply forked. Ecology It inhabits mostly blackwater rivers. It is largely zooplanktivorous specially cladocerans. References External linksMorphological development of Hypophthalmus fimbriatus and H. marginatus post-yolk-sac larvae (Siluriformes: Pimelodidae) {{Taxonbar, from=Q6405453 Pimelodidae Catfish of South America Fish described in 1858 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypophthalmus Marginatus
''Hypophthalmus marginatus'', commonly called the Mapará, is a species of demersal potamodromous catfish of the family Pimelodidae The Pimelodidae, commonly known as the long-whiskered catfishes, are a family of catfishes ( order Siluriformes). Taxonomy The family Pimelodidae has undergone much revision. Currently, it contains about 30 genera and about 90 recognized and kno ... that is native to Amazon and Orinoco River basins of Brazil, Peru and major rivers of French Guiana and Suriname. Description It grows to a length of 55.0 cm. Caudal fin deeply forked with black tips. Body silvery. Barbels are grey to black. Ecology A parasite of the esophageal musculature, '' Kudoa amazonica'' was found from the fish. References External linksReproductive cycle of the Amazonian planktivorous catfish Hypophthalmus marginatus (Siluriformes, Pimelodidae) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypophthalmus Oremaculatus
''Hypophthalmus oremaculatus'', is a species of demersal catfish of the family Pimelodidae The Pimelodidae, commonly known as the long-whiskered catfishes, are a family of catfishes ( order Siluriformes). Taxonomy The family Pimelodidae has undergone much revision. Currently, it contains about 30 genera and about 90 recognized and kno ... that is native to Paraná River basin of Argentina and Brazil. References External linksHolotype-based validation, redescription and continental-scale range extension of the South American catfish species Hypophthalmus oremaculatus Nani and Fuster, 1947, with additional information on Hypophthalmus edentatus Spix and Agassiz, 1829 (Siluriformes, Pimelodidae) {{Taxonbar, from=Q5586168 Pimelodidae Catfish of South America Fish described in 1947 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypophthalmus Edentatus
The Highwaterman catfish (''Hypophthalmus edentatus''), is a species of pelagic potamodromous catfish of the family Pimelodidae that is native to Guyana, Suriname, Venezuela, northern Brazil and Gulf of Paria. Description It grows to a length of 57.5 cm. It has no teeth but possesses many long gill rakers and three long barbels. Body elongated with less depressed head. Caudal fin triangular. Lateral line complete and scales absent on skin. Dorsum light grey with steely blue cast. Ventral sides yellowish and whitish below. Barbels light grey. Distribution It inhabits Amazon and Orinoco River basins and Atlantic coastal rivers of Guyana and Suriname. It is also found in Paraná River The Paraná River ( es, Río Paraná, links=no , pt, Rio Paraná, gn, Ysyry Parana) is a river in south-central South America, running through Brazil, Paraguay, and Argentina for some ."Parana River". Encyclopædia Britannica. Encyclopædia Br .... Ecology It lives in soft muddy bottoms and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Long-whiskered Catfish
The Pimelodidae, commonly known as the long-whiskered catfishes, are a family of catfishes ( order Siluriformes). Taxonomy The family Pimelodidae has undergone much revision. Currently, it contains about 30 genera and about 90 recognized and known but unnamed species. Wikipedia lists 109 species in this family. The low-eye catfish (previously family Hypophthalmidae), and thus the genus '' Hypophthalmus'', which contains four species, was reclassified with the pimelodids. This family previously included fish that are now classified under Pseudopimelodidae (previously subfamily Pseudopimelodinae) and Heptapteridae (previously subfamily Rhamdiinae). This family also previously included '' Conorhynchos conirostris'', currently ''incertae sedis''. However, a molecular analysis has shown unequivocal support for monophyly of the individual families and the genus ''Conorhynchos'' into a clade called Pimelodoidea, including Pimelodidae + Pseudopimelodidae and Heptapteridae + ''Conorhynch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pimelodidae
The Pimelodidae, commonly known as the long-whiskered catfishes, are a family of catfishes ( order Siluriformes). Taxonomy The family Pimelodidae has undergone much revision. Currently, it contains about 30 genera and about 90 recognized and known but unnamed species. Wikipedia lists 109 species in this family. The low-eye catfish (previously family Hypophthalmidae), and thus the genus '' Hypophthalmus'', which contains four species, was reclassified with the pimelodids. This family previously included fish that are now classified under Pseudopimelodidae (previously subfamily Pseudopimelodinae) and Heptapteridae (previously subfamily Rhamdiinae). This family also previously included '' Conorhynchos conirostris'', currently ''incertae sedis''. However, a molecular analysis has shown unequivocal support for monophyly of the individual families and the genus ''Conorhynchos'' into a clade called Pimelodoidea, including Pimelodidae + Pseudopimelodidae and Heptapteridae + ''Conorhynch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orinoco River
The Orinoco () is one of the longest rivers in South America at . Its drainage basin, sometimes known as the Orinoquia, covers , with 76.3 percent of it in Venezuela and the remainder in Colombia. It is the fourth largest river in the world by discharge volume of water. The Orinoco River and its tributaries are the major transportation system for eastern and interior Venezuela and the Llanos of Colombia. The environment and wildlife in the Orinoco's basin are extremely diverse. Etymology The river's name is derived from the Warao term for "a place to paddle", itself derived from the terms ''güiri'' (paddle) and ''noko'' (place) i.e. a navigable place. History The mouth of the Orinoco River at the Atlantic Ocean was documented by Christopher Columbus on 1 August 1498, during his third voyage. Its source at the Cerro Delgado–Chalbaud, in the Parima range, was not explored until 453 years later, in 1951. The source, near the Venezuelan–Brazilian border, at ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guyana
Guyana ( or ), officially the Cooperative Republic of Guyana, is a country on the northern mainland of South America. Guyana is an indigenous word which means "Land of Many Waters". The capital city is Georgetown. Guyana is bordered by the Atlantic Ocean to the north, Brazil to the south and southwest, Venezuela to the west, and Suriname to the east. With , Guyana is the third-smallest sovereign state by area in mainland South America after Uruguay and Suriname, and is the second-least populous sovereign state in South America after Suriname; it is also one of the least densely populated countries on Earth. It has a wide variety of natural habitats and very high biodiversity. The region known as "the Guianas" consists of the large shield landmass north of the Amazon River and east of the Orinoco River known as the "land of many waters". Nine indigenous tribes reside in Guyana: the Wai Wai, Macushi, Patamona, Lokono, Kalina, Wapishana, Pemon, Akawaio and Warao. Histo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suriname
Suriname (; srn, Sranankondre or ), officially the Republic of Suriname ( nl, Republiek Suriname , srn, Ripolik fu Sranan), is a country on the northeastern Atlantic coast of South America. It is bordered by the Atlantic Ocean to the north, French Guiana to the east, Guyana to the west, and Brazil to the south. At just under , it is the smallest sovereign state in South America. It has a population of approximately , dominated by descendants from the slaves and labourers brought in from Africa and Asia by the Dutch Empire and Republic. Most of the people live by the country's (north) coast, in and around its capital and largest city, Paramaribo. It is also List of countries and dependencies by population density, one of the least densely populated countries on Earth. Situated slightly north of the equator, Suriname is a tropical country dominated by rainforests. Its extensive tree cover is vital to the country's efforts to Climate change in Suriname, mitigate climate ch ... [...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] |
Rio Negro (Amazon)
The Rio Negro ( pt, Rio Negro, br ; es, Río Negro} "''Black River''"), or Guainía as it is known in its upper part, is the largest left tributary of the Amazon River (accounting for about 14% of the water in the Amazon basin), the largest blackwater river in the world, and one of the world's ten largest rivers by average discharge. Geography Upper course The source of the Rio Negro lies in Colombia, in the Department of Guainía where the river is known as the ''Guainía River''. The young river generally flows in an east-northeasterly direction through the Puinawai National Reserve, passing several small indigenous settlements on its way, such as Cuarinuma, Brujas, Santa Rosa and Tabaquén. After roughly 400 km the river starts forming the border between Colombia's Department of Guainía and Venezuela's Amazonas State. After passing the Colombian community of Tonina and Macanal the river turns Southwest. Maroa is the first Venezuelan town the river passes. 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
