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Rhamphichthyidae
Sand knifefish are freshwater electric fish of the family Rhamphichthyidae, from freshwater habitats in South America. Just like most part of the members of the Gymnotiformes group, they also have elongated and compressed bodies and electric organs. The long anal fin actually extends from before the pectoral fins to the tip of the tail. There is no dorsal fin. Teeth are absent in the oral jaws and the snout is very long and tubular. The nostrils are very close together. This group is sometimes known as the tubesnout knifefishes for this reason. They are nocturnal and burrow in the sand during the day. Genera According to FishBase there are only three genera in this family, but a comprehensive molecular study from 2015 showed that two additional genera belong here (formerly in Hypopomidae, marked with stars* in list), and this has been followed by recent authorities. *'' Gymnorhamphichthys'' *'' Hypopygus''* *'' Iracema'' *'' Rhamphichthys'' *'' Steatogenys''* See also * Li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhamphichthys Marmoratus
''Rhamphichthys'' (''Rhamphos ='' Greek for beak and ''Ichthys'' = Greek for fish) is a genus of fish that includes the South American sand knifefish. These fish are eel shaped (or anguiform) with a distinct beak like snout which gave them their name. Like most other knifefish ''Rhamphichthys'' species have electrical organs that help them live in the murky waters of South America. Currently there are 10 recognized species of ''Rhamphichthys'', although many changes have been made in their taxonomy since their original discovery. Species There have been multiple name changes within the genus, included here are currently accepted species, previous groupings that have been collapsed into single species, and genus changes. * '' Rhamphichthys apurensis'' Fernández-Yépez, 1968 **''Gymnorhamphichthys apurensis'' Fernández-Yépez, 1968 * '' Rhamphichthys atlanticus'' Triques, 1999 * '' Rhamphichthys drepanium'' Triques, 1999 * '' Rhamphichthys hahni'' Meinken, 1937 **''Sternar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhamphichthyidae
Sand knifefish are freshwater electric fish of the family Rhamphichthyidae, from freshwater habitats in South America. Just like most part of the members of the Gymnotiformes group, they also have elongated and compressed bodies and electric organs. The long anal fin actually extends from before the pectoral fins to the tip of the tail. There is no dorsal fin. Teeth are absent in the oral jaws and the snout is very long and tubular. The nostrils are very close together. This group is sometimes known as the tubesnout knifefishes for this reason. They are nocturnal and burrow in the sand during the day. Genera According to FishBase there are only three genera in this family, but a comprehensive molecular study from 2015 showed that two additional genera belong here (formerly in Hypopomidae, marked with stars* in list), and this has been followed by recent authorities. *'' Gymnorhamphichthys'' *'' Hypopygus''* *'' Iracema'' *'' Rhamphichthys'' *'' Steatogenys''* See also * Li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhamphichthys
''Rhamphichthys'' (''Rhamphos ='' Greek for beak and ''Ichthys'' = Greek for fish) is a genus of fish that includes the South American sand knifefish. These fish are eel shaped (or anguiform) with a distinct beak like snout which gave them their name. Like most other knifefish ''Rhamphichthys'' species have electrical organs that help them live in the murky waters of South America. Currently there are 10 recognized species of ''Rhamphichthys'', although many changes have been made in their taxonomy since their original discovery. Species There have been multiple name changes within the genus, included here are currently accepted species, previous groupings that have been collapsed into single species, and genus changes. * '' Rhamphichthys apurensis'' Fernández-Yépez, 1968 **''Gymnorhamphichthys apurensis'' Fernández-Yépez, 1968 * '' Rhamphichthys atlanticus'' Triques, 1999 * '' Rhamphichthys drepanium'' Triques, 1999 * '' Rhamphichthys hahni'' Meinken, 1937 **''Sternar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnotiformes
The Gymnotiformes are an order of teleost bony fishes commonly known as Neotropical knifefish or South American knifefish. They have long bodies and swim using undulations of their elongated anal fin. Found almost exclusively in fresh water (the only exceptions are species that occasionally may visit brackish water to feed), these mostly nocturnal fish are capable of producing electric fields to detect prey, for navigation, communication, and, in the case of the electric eel (''Electrophorus electricus''), attack and defense. A few species are familiar to the aquarium trade, such as the black ghost knifefish (''Apteronotus albifrons''), the glass knifefish (''Eigenmannia virescens''), and the banded knifefish (''Gymnotus carapo''). Description Anatomy and locomotion Aside from the electric eel (''Electrophorus electricus''), Gymnotiformes are slender fish with narrow bodies and tapering tails, hence the common name of "knifefishes". They have neither pelvic fins nor dorsal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnorhamphichthys
''Gymnorhamphichthys'' is a genus of South American sand knifefishes found in the Amazon, Araguaia, Orinoco and Río de la Plata basins, as well as rivers in the Guianas. They inhabit both small streams and large rivers, but usually over a sandy bottom. During the night they swim head-down over the sandy bottom to locate small invertebrate prey like insect larvae and during the day they rest buried under the sand. They are generally very pale (almost whitish, light silvery, light yellowish or semi-translucent), and have a pattern of dark bars/spots or a dark line along the side of the body. Their snout is relatively long, thin and tubular. ''Gymnorhamphichthys'' are small knifefish with the largest species reaching up to about in total length. Species There are currently six recognized species in this genus: * '' Gymnorhamphichthys bogardusi'' Lundberg, 2005 * '' Gymnorhamphichthys britskii'' T. P. Carvalho, C. S. Ramos & Albert, 2011 * '' Gymnorhamphichthys hypostomus'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypopomidae
The Hypopomidae are a family of fishes in the order Gymnotiformes known as the bluntnose knifefish. They may also be called grass or leaf knifefishes. These electric fish are not often eaten, of little commercial importance, rarely kept as aquarium fish, and poorly studied; however, species in this family may constitute a significant fraction of the biomass in the areas they inhabit. These fish originate from fresh water in Panama and South America. The Hypopomidae are confined to the humid neotropics, ranging the Río de la Plata of Argentina (35°S) to the Río Tuira of Panama (8°N). Hypopomids are known from the continental waters of all South American countries except Chile, and are most diverse in the Amazon Basin. Description Teeth are absent on the oral jaws. Unlike the closely related Rhamphichthyidae, species of this family do not have a tubular snout, but a blunt, short one. Also, the nostrils are well separated. This family contains the smallest gymnotiforms, ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iracema (fish)
''Iracema caiana'' is a species of sand knifefish endemic to Brazil where it is found in the Jauaperi River The Jauaperi River ( pt, Rio Jauaperi) is a river of Amazonas state in northwestern Brazil, a tributary of the Rio Negro. The lower section of the river forms part of the border between Amazonas and Roraima. Most of the river basin is in the W ... basin. It is the only member of its genus. References * Rhamphichthyidae Fish of Brazil Endemic fauna of Brazil Fish described in 1996 {{gymnotiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fish Families
This is a list of fish families sorted alphabetically by scientific name. There are 525 families in the list. __NOTOC__ A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - R - S - T - U - V - W - X - Y - Z ---- A Ab-Am - An-Ap - Ar-Au ---- Ab-Am * Abyssocottidae * Acanthuridae * Acestrorhynchidae * Achiridae * Achiropsettidae * Acipenseridae * Acropomatidae * Adrianichthyidae * Agonidae * Akysidae * Albulidae * Alepisauridae * Alepocephalidae * Alestiidae * Alopiidae * Amarsipidae * Ambassidae * Amblycipitidae * Amblyopsidae * Amiidae * Ammodytidae * Amphiliidae An-Ap * Anabantidae * Anablepidae * Anacanthobatidae * Anarhichadidae * Anguillidae * Anomalopidae * Anoplogastridae * Anoplopomatidae * Anostomidae * Anotopteridae * Antennariidae * Aphredoderidae * Aphyonidae * Apistidae * Aploactinidae * Aplocheilidae * Aplodactylidae * Apogonidae * Apteronotidae Ar-Au * Aracanidae * Arapaimidae * Argentinid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steatogenys
''Steatogenys'' is a genus of gymnotiform knifefishes found in the Amazon, Orinoco and Essequibo river basins in tropical South America. The widespread and common ''S. elegans'' is found in a wide range of habitats, from the shallow essentially static waters such as floodplain lakes to fast-flowing rivers as deep as . The two remaining species are less common and widespread, with ''A. duidae'' found mainly in small streams running through terra firme forests (forest that does not flood, unlike várzea) and ''S. ocellatus'' among submerged roots and branches in static or slow-flowing blackwater habitats. All three are regularly found among vegetation in floating meadows, a habitat that often contains little oxygen, but they are well-adapted to this. They are well-camouflaged and brown in color with a barred pattern. They resemble the related ''Hypopygus'', but are larger, reaching up to in total length depending on the exact species of ''Steatogenys''. They feed on invertebra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypopygus
''Hypopygus'' is a genus of South American gymnotiform knifefishes native to the Amazon, Orinoco and upper Paraguay basins, as well as rivers in the Guianas. They are often common, and found near submerged roots, aquatic vegetation and leaf-litter in streams, edges of rivers and floodplains. They are regularly found among vegetation in floating meadows, a habitat that often contains little oxygen, but they are well-adapted to this. They are well-camouflaged and brown in color with a banded/mottled pattern. They generally resemble the related '' Steatogenys'', but are smaller, reaching up to in total length depending on the exact species of ''Hypopygus''. The smallest is ''H. hoedemani'', which is the second-smallest knifefish, after ''Microsternarchus brevis''. They are nocturnal and feed on small invertebrates. During the day they remain hidden, often in groups that may number several dozen individuals. Taxonomy and species ''Hypopygus'' has traditionally been included in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Of South America
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. Most f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genera
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus '' Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
