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Heterobranchus
''Heterobranchus'' is a genus of airbreathing catfishes native to Africa. Depending on the exact species involved, fish of this genus reach from with the giant vundu (''H. longifilis'') being the largest completely freshwater fish in southern Africa, reaching SL and weighing up to . This genus had a wider distribution in the past. The extinct species '' H. palaeindicus'' is known from the Early Pliocene of India ( Siwalik Hills). The extinct species '' H. austriacus'' was widely distributed throughout central, western, and eastern Europe during the late Miocene. ''H. austriacus'' likely immigrated from Africa to Europe, potentially in repeated waves, when land connections formed between both continents around this time. Species This genus contains four recent and two fossil species: Recent species *'' Heterobranchus bidorsalis'' É. Geoffroy Saint-Hilaire, 1809 (African Catfish) *'' Heterobranchus boulengeri'' ( Pellegrin, 1922) *'' Heterobranchus isopterus'' ( Bleeker, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterobranchus Palaeindicus
''Heterobranchus'' is a genus of airbreathing catfishes native to Africa. Depending on the exact species involved, fish of this genus reach from with the giant vundu (''H. longifilis'') being the largest completely freshwater fish in southern Africa, reaching SL and weighing up to . This genus had a wider distribution in the past. The extinct species '' H. palaeindicus'' is known from the Early Pliocene of India (Siwalik Hills). The extinct species '' H. austriacus'' was widely distributed throughout central, western, and eastern Europe during the late Miocene. ''H. austriacus'' likely immigrated from Africa to Europe, potentially in repeated waves, when land connections formed between both continents around this time. Species This genus contains four recent and two fossil species: Recent species *'' Heterobranchus bidorsalis'' É. Geoffroy Saint-Hilaire, 1809 (African Catfish) *'' Heterobranchus boulengeri'' ( Pellegrin, 1922) *'' Heterobranchus isopterus'' ( Bleeker, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterobranchus Bidorsalis
''Heterobranchus bidorsalis'', the African catfish or eel-like fattyfin catfish, is an airbreathing catfish found in Africa. It is closely related to the vundu catfish, which is well known among fishermen. Description The head of ''Heterobranchus bidorsalis'' is shaped like an oval and has a rectangular dorsum. The snout is round and the eyes are lateral. The frontal fontanelle is long and narrow while the occipital fontanelle is relatively long and is shaped like an oval. The postorbital bones are completely united. The suprabranchial organ is well developed. The pectoral spine is smooth. The body and fins may have spots. It can reach a length of TL. The maximum recorded weight for this species is 30.0 kg. The species has 40-46 dorsal (in the back) soft rays, 49-58 anal soft rays, and 62-63 vertebrate. Relationship to humans This fish is commercially fished for human consumption. Habitat and distribution This catfish is a demersal fish and inhabits freshwater. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vundu
The vundu (''Heterobranchus longifilis'') is a species of large airbreathing catfish found widely in rivers and other freshwater habitats of sub-Saharan Africa, as well as the Nile. It is also called the sampa, cur, lenda, or certa. Description The vundu is the largest true freshwater fish in southern Africa, reaching up to in length and in weight. (Bull sharks are also found in southern Africa and reach a larger size, but occur in both fresh and saltwater.) Few other catfish have such large second dorsal fins (adipose fins) or such long barbels as do the vundu. Its barbels nearly reach to the origin of the pelvic fin. The colour of ''Heterobranchus longifilis'' is light to dark olive brown on its dorsal surface, getting lighter over the mid-body to a light brown. Its belly is off-white. Fins are usually light brown. In aquaculture, it is sometimes hybridized with another very large species, the African sharptooth catfish (''Clarias gariepinus''), resulting in offspring known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterobranchus Isopterus
''Heterobranchus isopterus'' is a species of airbreathing catfish found in West Africa West Africa, also known as Western Africa, is the westernmost region of Africa. The United Nations geoscheme for Africa#Western Africa, United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Gha .... References Fish of Africa Clariidae Fish described in 1863 Taxa named by Pieter Bleeker {{Clariidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterobranchus Boulengeri
''Heterobranchus boulengeri'' is a species of airbreathing catfish found in the Democratic Republic of the Congo, Zambia and Zimbabwe. It is found in Lake Mweru, the Lukonzolwa River and the upper Congo River. Etymology The fish is named in honor of ichthyologist-herpetologist George A. Boulenger (1858-1937), of the British Museum (Natural History), who had described many of the fishes from Central Africa and the Congo River system. Description ''Heterobranchus boulengeri'' has short barbels. Its gill arches extend anteriorly. This species can reach 64.0 cm (25.2 inches) TL in length. Habitat ''Heterobranchus boulengeri'' is found in tropical freshwater rivers and lakes. It is demersal The demersal zone is the part of the sea or ocean (or deep lake) consisting of the part of the water column near to (and significantly affected by) the seabed and the benthos. The demersal zone is just above the benthic zone and forms a layer o ..., preferring the bottom of these bod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airbreathing Catfish
Airbreathing catfish comprise the family Clariidae of the order Siluriformes. Sixteen genera and about 117 species of clariid fishes are described; all are freshwater species. Other groups of catfish also breathe air, such as the Callichthyidae and Loricariidae. Distribution Although clariids occur in India, Syria, southern Turkey, and large parts of Southeast Asia, their diversity is the largest in Africa. Description Clariid catfish are characterized by an elongated body, the presence of four barbels, long dorsal and anal fins, and especially by the autapomorphic presence of a supra branchial organ, formed by tree-like structures from the second and fourth gill arches. This suprabranchial organ, or labyrinth organ, allows some species the capability of traveling short distances on land ( walking catfish). The dorsal fin base is very long and is not preceded by a fin spine. The dorsal fin may or may not be continuous with the caudal fin, which is rounded. Pectoral and pelvic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catfish Genera
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 n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and recover. As a species' potential Range (biology), range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxon, Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the Fossil, fossil record) after a period of apparent absence. Over five billion species are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryotes globally, possibly many times more if microorganisms are included. Notable extinct animal species include Dinosaur, non-avian dinosaurs, Machairodontinae, saber-toothed cats, and mammoths. Through evolution, species arise through the process of specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achille Valenciennes
Achille Valenciennes (9 August 1794 – 13 April 1865) was a French zoology, zoologist. Valenciennes was born in Paris, and studied under Georges Cuvier. His study of parasitic worms in humans made an important contribution to the study of parasitology. He also carried out diverse systematic classifications, linking fossil and current species. He worked with Cuvier on the 22-volume "''Histoire Naturelle des Poissons''" (Natural History of Fish) (1828–1848), carrying on alone after Cuvier died in 1832. In 1832, he succeeded Henri Marie Ducrotay de Blainville (1777–1850) as chair of ''Histoire naturelle des mollusques, des vers et des zoophytes'' at the Muséum national d'histoire naturelle. Early in his career, he was given the task of classifying animals described by Alexander von Humboldt (1769–1859) during his travels in the American tropics (1799 to 1803), and a lasting friendship was established between the two men. He is the binomial authority for many species of fish, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
