''Metynnis'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

serrasalmid The Serrasalmidae (serrasalmids) are a family of characiform fishes, recently elevated to family status. It includes more than 90 species. The name means "serrated salmon family", which refers to the serrated keel running along the belly of these ...

fish from tropical and

subtropical The subtropical zones or subtropics are geographical zone, geographical and Köppen climate classification, climate zones to the Northern Hemisphere, north and Southern Hemisphere, south of the tropics. Geographically part of the Geographical z ...

South America. They are

herbivorous A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example foliage or marine algae, for the main component of its diet. As a result of their plant diet, herbivorous animals typically have mouthpart ...

omnivorous An omnivore () is an animal that has the ability to eat and survive on both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nutri ...

, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to

floodplain A floodplain or flood plain or bottomlands is an area of land adjacent to a river which stretches from the banks of its channel to the base of the enclosing valley walls, and which experiences flooding during periods of high discharge.Goudi ...

flooded forest Freshwater swamp forests, or flooded forests, are forests which are inundated with freshwater, either permanently or seasonally. They normally occur along the lower reaches of rivers and around freshwater lakes. Freshwater swamp forests are found ...

s, lakes, pools and reservoirs. They generally reach in

standard length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish m ...

, although a few species may reach up to . The genus contains many of the species known as silver dollars in the

aquarium An aquarium (plural: ''aquariums'' or ''aquaria'') is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aq ...

trade.

Species

There are currently 15 recognized species in this genus: * ''

Metynnis altidorsalis ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to flood ...

'' C. G. E. Ahl, 1923 * ''

Metynnis argenteus ''Metynnis argenteus'' is a species of serrasalmid fish endemic to the Tapajós River Basin in Brazil. It is one of the species known in the aquarium trade as the " silver dollar". ''M. argenteus'' is generally considered the archetypal silver ...

'' C. G. E. Ahl, 1923 (silver dollar) * ''

Metynnis cuiaba ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to flood ...

'' Pavanelli, Ota &

Petry Petry, or Pétry, is a surname. Notable people with the surname include: * Ann Petry (1908–1997), American author * August Arthur Petry (1858–1932), German botanist and entomologist * Cássio Petry (born 1978), Brazilian canoeist * Christian P ...

, 2009 * ''

Metynnis fasciatus ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to flood ...

'' C. G. E. Ahl, 1931 * ''

Metynnis guaporensis ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to flood ...

'' C. H. Eigenmann, 1915 * ''

Metynnis hypsauchen ''Metynnis hypsauchen'' is a species of serrasalmid found in Amazon and Paraguay river basins, as well as rivers of the Guiana Shield. It is one of the fish known as the " silver dollar" in the aquarium An aquarium (plural: ''aquariums'' ...

'' ( J. P. Müller & Troschel, 1844) (silver dollar) * ''

Metynnis lippincottianus ''Metynnis lippincottianus'', commonly known as the spotted silver dollar, is a species of serrasalmid native to the Brazilian Amazon and multiple rivers of French Guiana French Guiana ( or ; french: link=no, Guyane ; gcr, label=French Gu ...

'' (

Cope The cope (known in Latin as ''pluviale'' 'rain coat' or ''cappa'' 'cape') is a liturgical vestment, more precisely a long mantle or cloak, open in front and fastened at the breast with a band or clasp. It may be of any liturgical colours, litu ...

, 1870) (spotted silver dollar) * ''

Metynnis longipinnis ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to flood ...

'' Zarske &

Géry Géry () is a commune in the Meuse department in Grand Est in north-eastern France. See also *Communes of the Meuse department The following is a list of the 499 communes of the Meuse department of France. The communes cooperate in the follo ...

, 2008 (silver dollar) * ''

Metynnis luna ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to flood ...

, 1878 * ''

Metynnis maculatus ''Metynnis maculatus'', the spotted metynnis, is a species of serrasalmid fish found in Argentina and Brazil, and possibly in Bolivia, Paraguay, and Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacio ...

'' ( Kner, 1858) (spotted metynnis) * ''

Metynnis melanogrammus ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to flood ...

'' Ota, Rapp Py-Daniel & Jégu, 2016Ota, R.P., Rapp Py-Daniel, L.H. & Jégu, M. (2016)
A new Silver Dollar species of ''Metynnis'' Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela.
''Neotropical Ichthyology, 14 (4): e160023.'' * '' Metynnis mola'' C. H. Eigenmann & C. H. Kennedy, 1903 * '' Metynnis orinocensis'' (

Steindachner Franz Steindachner (11 November 1834 in Vienna – 10 December 1919 in Vienna) was an Austrian zoologist, ichthyologist, and herpetologist. He published over 200 papers on fishes and over 50 papers on reptiles and amphibians. Steindachner describ ...

, 1908) * '' Metynnis otuquensis'' C. G. E. Ahl, 1923 * '' Metynnis polystictus'' Zarske &

, 2008 (silver dollar)

References

Fish of South America Ray-finned fish genera Serrasalmidae Taxa named by Edward Drinker Cope {{Characiformes-stub