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Gonorynchiformes
The Gonorynchiformes are an order of ray-finned fish that includes the important food source, the milkfish (''Chanos chanos'', family Chanidae), and a number of lesser-known types, both marine and freshwater. The alternate spelling "Gonorhynchiformes", with an "h", is frequently seen but not official. Gonorynchiformes have small mouths and no teeth. They are the sole group in the clade Anotophysi, a subgroup of the superorder Ostariophysi. They are characterized by a primitive Weberian apparatus formed by the first three vertebrae and one or more cephalic ribs within the head. This apparatus is believed to be a hearing organ, and is found in a more advanced and complex form in the related cypriniform fish, such as carp. Also like the cypriniforms, the gonorynchiforms produce a substance from their skin when injured that dissolves into the water and acts an alarm signal to other fish. Taxonomy Although many of the families are rather small, there are several fossil genera. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ostariophysi
Ostariophysi is the second-largest superorder of fish. Members of this superorder are called ostariophysians. This diverse group contains 10,758 species, about 28% of known fish species in the world and 68% of freshwater species, and are present on all continents except Antarctica. They have a number of common characteristics such as an alarm substance and a Weberian apparatus. Members of this group include fish important to people for food, sport, the aquarium industry, and research. Taxonomy The superorder is divided into two series, Anotophysi and Otophysi. However, in older literature, Ostariophysi was restricted only to the fish that are currently classified under Otophysi. Otophysi was coined in 1970 by Rosen and Greenwood to separate the traditional Ostariophysians from the added Gonorynchiformes. The superorder is classified below: *Series Anotophysi ** Gonorynchiformes, about 37 species *Series Otophysi (Euostariophysi) ** Cypriniformes (minnows and allies), about 4, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cypriniformes
Cypriniformes is an order of ray-finned fish, including the carps, minnows, loaches, and relatives. Cypriniformes is an Order within the Superorder Ostariophysi consisting of "Carp-like" Ostariophysins. This order contains 11-12 families, although some authorities have designated as many as 23, over 400 genera, and more than 4,250 species, with new species being described every few months or so, and new genera being recognized frequently.Eschmeyer, W.N., Fong, J.D. (2015Species by family/subfamilyin the Catalog of Fishes, California Academy of Sciences (retrieved 2 July 2015) They are most diverse in southeastern Asia, and are entirely absent from Australia and South America.Nelson (2006) At 112 years old, the longest-lived cypriniform fish documented is the bigmouth buffalo. Their closest living relatives are the Characiformes ( characins and allies), the Gymnotiformes (electric eel and American knifefishes), and the Siluriformes (catfishes). Description Like other or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actinopterygii
Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or horny spines (rays), as opposed to the fleshy, lobed fins that characterize the class Sarcopterygii (lobe-finned fish). These actinopterygian fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the link or connection between these fins and the internal skeleton (e.g., pelvic and pectoral girdles). By species count, actinopterygians dominate the vertebrates, and they constitute nearly 99% of the over 30,000 species of fish. They are ubiquitous throughout freshwater and marine environments from the deep sea to the highest mountain streams. Extant species can range in size from ''Paedocypris'', at , to the massive ocean sunfish, at , and the long-bodied oarfish, at . The vast majority of Actinopt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phractolaemus
The hingemouth (''Phractolaemus ansorgii'') is a small freshwater fish that is found only in west central Africa, the sole member of the subfamily Phractolaeminae of the family Kneriidae. The mouth can extend like a small trunk, thus the name, and has just two teeth, both in the lower jaw. The swim bladder has two compartments, and can function as a lung, allowing the hingemouth to survive in oxygen Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as wel ...-poor environments. References * * * Kneriidae Fish described in 1901 Taxa named by George Albert Boulenger Freshwater fish of Africa {{Gonorynchiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kneria
''Kneria'' is a genus of small fish in the family Kneriidae. All 13 species in this genus are restricted to Africa. Named in honor of Austrian ichthyologist Rudolf Kner (1810-1869) Species FishBase lists 13 species: * '' Kneria angolensis'' Steindachner, 1866 * '' Kneria ansorgii'' ( Boulenger, 1910) * '' Kneria auriculata'' ( Pellegrin, 1905) (Airbreathing shellear) * '' Kneria katangae'' Poll, 1976 * '' Kneria maydelli'' Ladiges & Voelker, 1961 (Cunene kneria) * '' Kneria paucisquamata'' Poll & D. J. Stewart, 1975 * '' Kneria polli'' Trewavas, 1936 (Western shellear) * '' Kneria ruaha'' Seegers, 1995 * '' Kneria rukwaensis'' Seegers, 1995 * '' Kneria sjolandersi'' Poll, 1967 * '' Kneria stappersii'' Boulenger, 1915 * '' Kneria uluguru'' Seegers, 1995 * '' Kneria wittei'' Poll, 1944 However there is another species, known as the Southern Kneria (''Kneria'' sp. 'South Africa'), occurring only in the headwaters of a few tributaries of the Crocodile River, in the In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonorynchidae
Gonorynchidae is a family of the Gonorynchiformes which has a number of fossil taxa and one extant genus, ''Gonorynchus ''Gonorynchus'' is a genus of long thin gonorynchiform ray-finned fish, commonly called beaked salmon or beaked sandfish that live on sandy bottoms near shorelines. There are five known extant species which are placed in this genus. All have a ...'', the beaked salmons. References *Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 364: 560. Archived from the original on 2011-07-23. Retrieved 2011-05-17. {{Taxonbar, from=Q14266423 Marine fish families Taxa named by Albert Günther Ray-finned fish families ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parakneria
''Parakneria'' is a genus of fish in the family Kneriidae, with 14 species, all of which are restricted to Africa. Species There are 14 species: * '' Parakneria abbreviata'' ( Pellegrin, 1931) * '' Parakneria cameronensis'' ( Boulenger, 1909) * '' Parakneria damasi'' Poll, 1965 * '' Parakneria fortuita'' M. J. Penrith, 1973 (Cubango kneria) * '' Parakneria kissi'' Poll, 1969 * '' Parakneria ladigesi'' Poll, 1967 * '' Parakneria lufirae'' Poll, 1965 * '' Parakneria malaissei'' Poll, 1969 * '' Parakneria marmorata'' (Norman Norman or Normans may refer to: Ethnic and cultural identity * The Normans, a people partly descended from Norse Vikings who settled in the territory of Normandy in France in the 10th and 11th centuries ** People or things connected with the Norm ..., 1923) * '' Parakneria mossambica'' R. A. Jubb & Bell-Cross, 1974 (Gorongoza kneria) * '' Parakneria spekii'' ( Günther, 1868) * '' Parakneria tanzaniae'' Poll, 1984 * '' Parakneria thysi'' Poll, 1965 * '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phractolaemidae
The hingemouth (''Phractolaemus ansorgii'') is a small freshwater fish that is found only in west central Africa, the sole member of the subfamily Phractolaeminae of the family Kneriidae. The mouth can extend like a small trunk, thus the name, and has just two teeth, both in the lower jaw. The swim bladder has two compartments, and can function as a lung, allowing the hingemouth to survive in oxygen Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as wel ...-poor environments. References * * * Kneriidae Fish described in 1901 Taxa named by George Albert Boulenger Freshwater fish of Africa {{Gonorynchiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonorynchus Gonorynchus
''Gonorynchus gonorynchus'' is a species of fish in the family Gonorynchidae, found on temperate continental shelves worldwide. Common names for this fish include mousefish, ratfish, sandfish, and sand eel.Tony Ayling & Geoffrey Cox, ''Collins Guide to the Sea Fishes of New Zealand'', (William Collins Publishers Ltd, Auckland, New Zealand 1982) Location ''Gonorynchus gonorynchus'' inhabits the coasts of the southern third of Africa stretching from Skeleton Coast to Mozambique as well as the coasts of Australia and Japan. Its range also stretches into the Eastern Pacific with specimens found off the coast of Chile. Diet and habitat ''Gonorynchus gonorynchus'' lives in and above the seabed at depths ranging from 0–200 m. It is generally nocturnal and buries itself in the seabed during daylight hours. It has a varied diet, eating zooplankton and free-swimming and buried invertebrates. The young are preyed upon by seabirds. As well adults of the species are preyed upon by j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cromeria
''Cromeria'' is a small genus of fish in the family Kneriidae found in fresh waters in the Sudan, Mali, and Guinea in the Nile and Niger River The Niger River ( ; ) is the main river of West Africa, extending about . Its drainage basin is in area. Its source is in the Guinea Highlands in south-eastern Guinea near the Sierra Leone border. It runs in a crescent shape through ...s of Africa. These reach a length of up to 4.4 cm. The currently recognized species are:Moritz, T., R. Britz and K.E. Linsenmair 2006. ''Cromeria nilotica and C. occidentalis, two valid species of the African freshwater fish family Kneriidae'' (Teleostei: Gonorhynchiformes). *'' Cromeria nilotica'' Boulenger, 1901 (naked shellear) *'' Cromeria occidentalis'' Daget, 1954 References *Eschmeyer, William N., ed. (1998). ''Catalog of Fishes Special Publication of the Center for Biodiversity Research and Information'', no. 1, vol 1–3. p. 2905. California Academy of Sciences: San F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grasseichthys
''Grasseichthys gabonensis'' is an extremely small (around 2 cm) fish native to the Ivindo and Central Congo basins of Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area .... It is the only member of its genus. References Endemic fauna of Gabon Kneriidae Taxa named by Jacques Géry Fish of Africa Monotypic freshwater fish genera {{Gonorynchiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
