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Lepidarchidae
Lepidarchidae is a small family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ... of Fresh water, freshwater fish in the order Characiformes. It contains only two threatened, Monotypic taxon, monotypic genera native to western Africa. The following genera are in this family: * ''Arnoldichthys'' George S. Myers, Myers, 1926 * ''Lepidarchus'' Tyson R. Roberts, Roberts, 1966 Both of these genera were previously placed in Alestidae, but moved to their own family in 2024 when this placement was found to be Paraphyly, paraphyletic, as these two genera are more closely related to the Hepsetidae than to alestids. Molecular phylogenetic estimates suggest that this family has an ancient divergence dating to the Late Cretaceous (Santonian to Campanian, about 84–77.5 mya). The divergence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepidarchus
The Adonis tetra (''Lepidarchus adonis'') also known as the jellybean tetra, is a very small African fish of the family Lepidarchidae. It is the monotypic, only member of its genus, and one of two members of its family. Range ''Lepidarchus adonis'' is native to freshwater habitats near the Atlantic coast in Ghana, Sierra Leone, and Côte d'Ivoire. Size The Adonis tetra can reach long, smaller than the neon tetra, and is one of the smallest fish normally kept in aquaria. Conservation status The IUCN red list has listed the Adonis tetra as being a Vulnerable species since 2010. There is considerable cause for concern because of the increasing levels of pollution in the waterways it inhabits. References External links * http://aquavisie.retry.org/Database/Aquariumfish/Lepidarchus_adonis.html Adonis Tetra Fact Sheet {{Taxonbar, from=Q366188 Lepidarchidae Tetras Freshwater fish of West Africa Fish described in 1966 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Niger Tetra
''Arnoldichthys'' is monospecific genus of freshwater ray-finned fish belonging to the family Lepidarchidae, the African tetras. The only species in the genus is ''Arnoldichthys spilopterus'', the Niger tetra. This taxon is endemic to Nigeria. Description and ecology ''Arnoldichthys'' is a tropical freshwater species found only in a limited number of locations in Nigeria (Ogun and Niger rivers). Males are on average long. Its diet consists of worms, insects, and, crustaceans. Females in captivity can lay about 1,000 eggs, which hatch within 30–34 hours. Conservation ''Arnoldichthys'' is currently classified as endangered by the IUCN due to its limited range coupled with losses to the aquarium trade and ongoing habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ... degradati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Characiformes
Characiformes is an order of ray-finned fish, comprising the characins and their allies. Grouped in 18 recognized families, more than 2000 different species are described, including the well-known piranha and tetras.; Buckup P.A.: "Relationships of the Characidiinae and phylogeny of characiform fishes (Teleostei: Ostariophysi)", ''Phylogeny and Classification of Neotropical Fishes'', L.R. Malabarba, R.E. Reis, R.P. Vari, Z.M. Lucena, eds. (Porto Alegre: Edipucr) 1998:123-144. Taxonomy The Characiformes form part of a series called the Otophysi within the superorder Ostariophysi. The Otophysi contain three other orders, Cypriniformes, Siluriformes, and Gymnotiformes. The Characiformes form a group known as the Characiphysi with the Siluriformes and Gymnotiformes. The order Characiformes is the sister group to the orders Siluriformes and Gymnotiformes, though this has been debated in light of recent molecular evidence. Originally, the characins were all grouped within a sin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hepsetidae
''Hepsetus'' is a genus of freshwater ray-finned fishes belonging to the monotypic family Hepsetidae, the African pikes or African pike characins, in the order Characiformes. It was long believed that only a single widespread species existed, ''H. odoe'', but studies in 2011–2013 have shown that this species is restricted to parts of West and Central Africa. The well-known species of southern Africa, including Kafue River, is ''Hepsetus cuvieri''. These predatory fish reach up to in length. A 2024 study found their closest relatives to be the newly-defined family Lepidarchidae, which they diverged from during the Late Cretaceous. The divergence of these two families appears to have been driven by the Trans-Saharan Seaway, which served as a marine barrier between western and eastern Africa at the time. Species There are currently six recognized species in this genus: * ''Hepsetus cuvieri'' ( Castelnau, 1861) * ''Hepsetus kingsleyae'' Vreven, Decru & Snoeks, 2013 * ''Hepsetus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alestidae
African tetras (family (biology), family Alestidae, formerly spelled Alestiidae) are a group of Characiformes, characiform fish found exclusively in Africa. This family contains about 18 genera and 119 species. Among the best known members are the Congo tetra, and Hydrocynus, African tigerfish. Although presently found only in Africa, fossil evidence suggests that during the Paleogene, they ranged as far north as southern Europe and as far east as the Arabian subcontinent. Fossil remains date back to potentially the Late Paleocene with ''Hydrocynus'' remains known from Algeria. Alestid-like teeth are also known from the Late Cretaceous (Maastrichtian) of France, and phylogenetic evidence also suggests they diverged around this time. Taxonomy Taxonomy based on Van der Laan 2017 and ''Eschmeyer's Catalog of Fishes'' (2025): * Family Alestidae Cockerell, 1910 ** Genus ''Alestes'' Johannes Peter Müller, Müller & Franz Hermann Troschel, Troschel, 1844 ** Genus ''Alestion'' Tyson R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Characiformes Families
Characiformes is an order of ray-finned fish, comprising the characins and their allies. Grouped in 18 recognized families, more than 2000 different species are described, including the well-known piranha and tetras.; Buckup P.A.: "Relationships of the Characidiinae and phylogeny of characiform fishes (Teleostei: Ostariophysi)", ''Phylogeny and Classification of Neotropical Fishes'', L.R. Malabarba, R.E. Reis, R.P. Vari, Z.M. Lucena, eds. (Porto Alegre: Edipucr) 1998:123-144. Taxonomy The Characiformes form part of a series called the Otophysi within the superorder Ostariophysi. The Otophysi contain three other orders, Cypriniformes, Siluriformes, and Gymnotiformes. The Characiformes form a group known as the Characiphysi with the Siluriformes and Gymnotiformes. The order Characiformes is the sister group to the orders Siluriformes and Gymnotiformes, though this has been debated in light of recent molecular evidence. Originally, the characins were all grouped within a singl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish
A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can be grouped into the more basal (phylogenetics), basal jawless fish and the more common jawed fish, the latter including all extant taxon, living cartilaginous fish, 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 (biology), class (Pisces), modern phylogenetics views fish as a paraphyletic group. Most fish are ectotherm, cold-blooded, their body temperature varying with the surrounding water, though some large nekton, active swimmers like white shark and tuna can hold a higher core temperature. Many fish can communication in aquatic animals#Acoustic, communicate acoustically with each other, such as during courtship displays. The stud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Taxon
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of Genus, genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melanie Stiassny
Melanie Lisa Jane Stiassny (born 17 January 1953 in Bielefeld, Germany) is the Axelrod Research Curator of Ichthyology at the American Museum of Natural History. Her research interests focus on freshwater biodiversity documentation and systematic ichthyology in the Old World tropics, including tropical Africa (especially in the Congo River) and Madagascar. She has published broadly on the biogeography conservation and systematics of teleosts. Education Stiassny holds both a BS and a Ph.D. from King's College London, and has previously taught at Harvard University and Columbia University and is now a professor in the Richard Gilder Graduate School at the American Museum of Natural History. She is a member of the National Council of the World Wildlife Fund, the Advisory Council of Conservation International’s Center for Applied Biodiversity Science, the Advisory Board of National Geographic Society’s Conservation Trust, and the Deutsche Cichliden Gesellschaft (DCG, German Cich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tyson R
Tyson is an English male given name of old French origin meaning 'high-spirited', 'fire'. It is from this that a surname arose 'son of Tyson'. Surname * Alan Tyson (1926–2000), British musicologist * Barbara Tyson (born 1964), Canadian actress * Bill Tyson, Irish writer and producer * Cade Tyson (born 2003), American basketball player * Cathy Tyson (born 1965), British actress * Charles Tyson (1885–1964), English footballer *Cicely Tyson (1924–2021), American actress * Donald J. Tyson (1930–2011), American business executive and billionaire * Edward Tyson (1650–1708), English scientist and physician * Frank Tyson (1930–2015), English cricketer * Grace Tyson (1881–1941), American Vaudeville performer and actress * Ian Tyson (1933–2022), Canadian singer-songwriter * Isaac Tyson (1792–1861), American mining industrialist * Jacob Tyson (1773–1848), American politician * James Tyson (1819–1898), Australian pastoralist * J. Anthony Tyson (born 1940), American phys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresh Water
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salt (chemistry), salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include non-salty mineral water, mineral-rich waters, such as chalybeate springs. Fresh water may encompass frozen water, frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ice pellets, 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, subterranea (geography), subterranean subterranean river, rivers and underground lake, 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 sur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
