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Wallago
''Wallago'' is a genus of catfishes order Siluriformes of the family Siluridae, or sheatfish. They are found in rivers throughout southern and southeastern Asia. The only extant species of this genus is '' Wallago attu''. Taxonomy The monophyly of this genus is ambiguous and it is not diagnosed by any synapomorphies. The name is derived from Wallagoo, a Telugu name in Vishakapatnam noted by Patrick Russell in his 1803 book. Species There are currently 2 recognized species in this genus, of which only one is recent: * '' Wallago attu'' (Bloch & J. G. Schneider, 1801) (Wallago) *† ''Wallago maemohensis'' ( Roberts, 2014) (extinct since the Miocene) For a long time, the ''Wallago'' genus was thought to include more species, namely '' Wallagonia leerii'' (helicopter catfish), '' Wallagonia maculatus'' and '' Wallagonia micropogon''. However, a close investigation by Tyson R. Roberts of their osteological features yielded that all these species actually belong to two entirely sep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wallago Attu
''Wallago attu'', boal, or helicopter catfish, is a species of freshwater catfish of the family Siluridae, native to South and Southeast Asia. ''W. attu'' is found in large rivers and lakes in two geographically disconnected regions (disjunct distribution), with one population living over much of the Indian Subcontinent and the other in parts of Southeast Asia. This species can reach a length up to .Roberts, T.R. (2014): ''Wallago'' Bleeker, 1851 and ''Wallagonia'' Myers, 1938 (Ostariophysi, Siluridae), Distinct Genera of Tropical Asian Catfishes, with Description of †''Wallago maemohensis'' from the Miocene of Thailand. ''Bulletin of the Peabody Museum of Natural History, 55 (1): 35-47.'' It shares parts of its native range with the externally similar, but much larger '' Wallagonia leerii'', and is subsequently often confused for it. It can, however, be differentiated by its relatively long and narrower head, as well as its dorsal fin, which is high and sharp, opposed to that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wallagonia Leerii
''Wallagonia leerii'', also known as the Tapah and formerly the striped wallago catfish is a species of catfish native to Southeast Asia. Its habitat ranges from the river drainages of Thailand through the Malayan peninsula to the islands of Sumatra and Borneo in Indonesia. It can grow up to in length and weigh up to . It has been used as food in Southeast Asia since ancient times. Overfishing for its prized meat has caused the population to significantly decrease. Furthermore, the breeding migration pattern of this fish is especially vulnerable to damming, which has also decreased the wild population significantly. Until osteological research validated the genus '' Wallagonia'' in 2014, ''W. leerii'' was included in the genus ''Wallago''.Roberts, T.R. (2014): ''Wallago'' Bleeker, 1851 and ''Wallagonia'' Myers, 1938 (Ostariophysi, Siluridae), Distinct Genera of Tropical Asian Catfishes, with Description of †''Wallago maemohensis'' from the Miocene of Thailand. ''Bulletin of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wallagonia
''Wallagonia'' is a recently established genus of silurid catfishes, containing 3 distinct species, all of whom are native to Southeast Asia: *''Wallagonia leerii'' *'' Wallagonia maculatus'' *'' Wallagonia micropogon'' For the longest time, these species were included in the genus Wallago, only in 2014 the separate genus Wallagonia was finally established based on osteological features that clearly separate the two.Roberts, T.R. (2014): ''Wallago Bleeker, 1851 and Wallagonia Myers, 1938 (Ostariophysi, Siluridae), Distinct Genera of Tropical Asian Catfishes, with Description of †Wallago maemohensis from the Miocene of Thailand.'' Bulletin of the Peabody Museum of Natural History, 55 (1): 35-47. doi:10.3374/014.055.0103 While ''W. leerii'' is spread widely throughout Southeast Asia, ''W. micropogon'' and ''W. maculatus'' have a highly restricted habitat, with ''W. micropogon'' only occurring in the Mekong river basin and ''W. maculatus'' only occurring in the Kinabatangan riv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wallagonia Micropogon
''Wallagonia micropogon'' is a species of catfish in the genus ''Wallagonia''. This species was recently discovered and is found in the Mekong River drainage area between southern Vietnam and northern Laos as well as Chao Phraya River in Thailand. It is a freshwater fish. Until osteological research validated the genus ''Wallagonia'' in 2014, ''W. micropogon'' was included in the genus ''Wallago ''Wallago'' is a genus of catfishes order Siluriformes of the family Siluridae, or sheatfish. They are found in rivers throughout southern and southeastern Asia. The only extant species of this genus is '' Wallago attu''. Taxonomy The monophyly ...''. References Siluridae Catfish of Asia Fish of the Mekong Basin Fish of Cambodia Fish of Laos Fish of Thailand Fish of Vietnam Fish described in 2004 Taxobox binomials not recognized by IUCN {{catfish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siluridae
Siluridae is the nominate family (biology), family of catfishes in the order (biology), order Siluriformes. About 105 living species of silurids are placed in 12 or 14 genera. Although silurids occur across much of Europe and Asia, they are most diverse in Southeast Asia, beyond which their diversity decreases in temperate East Asia, the Indian subcontinent, Southwest Asia, and Europe. Silurids are apparently absent from much of central Asia. The family can be divided into two groups, a temperate North Eurasian clade and a more diverse subtropical/tropical South and Southeast Asian clade. Notable species *Wels catfish, ''Silurus glanis'' *Phantom catfish, ''Kryptopterus vitreolus'' *''Wallago attu'' *''Wallagonia leerii'' *Aristotle's catfish *Amur catfish *''Phalacronotus apogon'' *''Ompok'' Common features The family Siluridae is very diverse, with not very many distinctive features among all species, but some major ones include gigantism, and smaller versions of attributes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wallago Hexanema
''Wallago hexanema'' is a species of catfish in the family Siluridae (the sheatfishes), native to Asia Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which .... References Siluridae {{Siluriformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pieter Bleeker
Pieter Bleeker (10 July 1819 – 24 January 1878) was a Dutch medical doctor, Ichthyology, ichthyologist, and Herpetology, herpetologist. He was famous for the ''Atlas Ichthyologique des Indes Orientales Néêrlandaises'', his monumental work on the fishes of East Asia published between 1862 and 1877. Life and work Bleeker was born on 10 July 1819 in Zaandam. He was employed as a medical officer in the Royal Netherlands East Indies Army from 1842 to 1860, (in French). stationed in the Dutch East Indies (now Indonesia). During that time, he did most of his ichthyology work, besides his duties in the army. He acquired many of his specimens from local fishermen, but he also built up an extended network of contacts who would send him specimens from various government outposts throughout the islands. During his time in Indonesia, he collected well over 12,000 specimens, many of which currently reside at the Naturalis Biodiversity Center in Leiden. Bleeker corresponded with Auguste Dum� ... [...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] |
Freshwater Fish Genera
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include non-salty mineral-rich waters, such as chalybeate springs. Fresh water may encompass frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ sleet and graupel, and surface runoffs that form inland bodies of water such as wetlands, ponds, lakes, rivers, streams, as well as groundwater contained in aquifers, subterranean rivers and lakes. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of vascular plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. Fresh water is the water resource that is of the most and immediate use to humans. Fresh water is not always ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Of Asia
A fish (: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits. Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct placoderms and acanthodians. In a break to the long tradition of grouping all fish into a single class (Pisces), modern phylogenetics views fish as a paraphyletic group. Most fish are cold-blooded, their body temperature varying with the surrounding water, though some large active swimmers like white shark and tuna can hold a higher core temperature. Many fish can communicate acoustically with each other, such as during courtship displays. The study of fish is known as ichthyology. The earliest fish appeared during the Cambrian as small filter feeders; they continued to evolve through the Paleozoic, diversifying into many forms. The earliest f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Anatomy
Fish anatomy is the study of the form or Morphology (biology), morphology of fish. It can be contrasted with fish physiology, which is the study of how the component parts of fish function together in the living fish. In practice, fish anatomy and fish physiology complement each other, the former dealing with the structure of a fish, its organs or component parts and how they are put together, such as might be observed on the dissecting table or under the microscope, and the latter dealing with how those components function together in living fish. The anatomy of fish is often shaped by the physical characteristics of water, the medium in which fish live. Water is much density, denser than air, holds a relatively small amount of dissolved oxygen, and absorbs more light than air does. The body of a fish is divided into a head, trunk and tail, although the divisions between the three are not always externally visible. The skeleton, which forms the support structure inside the fish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
