''Hasemania'' 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 ...

characin 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.: "Relationshi ...

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

, where only found in river basins that originate on the

Brazilian Shield The Amazonian Craton is a geologic province located in South America. It occupies a large portion of the central, north and eastern part of the continent and represents one of Earth's largest cratonic regions. The Guiana Shield and Central Brazi ...

, ranging west to the

Juruena Juruena is a municipality in the state of Mato Grosso in the Central-West Region of Brazil. The city is served by Juruena Airport. See also *List of municipalities in Mato Grosso *Sepotuba River The Sepotuba River is a river in the state of M ...

system, north to the São Francisco system and south to the Paraná system.Serra, J.P. & Langeani, F. (2015): A new ''Hasemania'' Ellis from the upper rio Paraná basin, with the redescription of ''Hasemania crenuchoides'' Zarske & Géry (Characiformes: Characidae). ''Neotropical Ichthyology, 13 (3): 479-486.'' The individual species generally have quite small ranges and two, ''H. crenuchoides'' and ''H. piatan'', are considered

threatened Threatened species are any species (including animals, plants and fungi) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensat ...

by Brazil's Ministry of the Environment. They are small fish, up to 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 ...

depending on the exact species. The genus is named for zoologist and explorer

John Diederich Haseman John is a common English name and surname: * John (given name) * John (surname) John may also refer to: New Testament Works * Gospel of John, a title often shortened to John * First Epistle of John, often shortened to 1 John * Second E ...

. He collected all of the known species of this genus.

Species

There are currently 9 recognized species in this genus: * ''

Hasemania crenuchoides ''Hasemania'' is a genus of characins endemic to Brazil, where only found in river basins that originate on the Brazilian Shield, ranging west to the Juruena system, north to the São Francisco system and south to the Paraná system.Serra, J.P. ...

'' Zarske & Géry, 1999 * ''

Hasemania hanseni ''Hasemania'' is a genus of characins endemic to Brazil, where only found in river basins that originate on the Brazilian Shield, ranging west to the Juruena system, north to the São Francisco system and south to the Paraná system.Serra, J.P. ...

'' ( Fowler, 1949) * ''

Hasemania kalunga ''Hasemania'' is a genus of characins endemic to Brazil, where only found in river basins that originate on the Brazilian Shield, ranging west to the Juruena system, north to the São Francisco system and south to the Paraná system.Serra, J.P. ...

'' Bertaco & F. R. de Carvalho, 2010 * ''

Hasemania maxillaris ''Hasemania'' is a genus of characins endemism, endemic to Brazil, where only found in river basins that originate on the Brazilian Highlands, Brazilian Shield, ranging west to the Juruena River, Juruena system, north to the São Francisco River, ...

'' Durbin, 1911 * '' Hasemania melanura'' Durbin, 1911 (Copper tetra) * ''

Hasemania nana The silvertip tetra (''Hasemania nana'') is a species of characid freshwater fish omnivores native to streams and creeks in the São Francisco basin in Brazil, but frequently kept in aquariums. Silvertip tetras are slightly more aggressive than ...

'' ( Lütken, 1875) (Silvertip tetra) * ''

Hasemania piatan ''Hasemania'' is a genus of characins endemic to Brazil, where only found in river basins that originate on the Brazilian Shield, ranging west to the Juruena system, north to the São Francisco system and south to the Paraná system.Serra, J.P. ...

'' Zanata & J. P. Serra, 2010 * ''

Hasemania uberaba ''Hasemania'' is a genus of characins endemic to Brazil, where only found in river basins that originate on the Brazilian Shield, ranging west to the Juruena system, north to the São Francisco system and south to the Paraná system.Serra, J.P. ...

'' J. P. Serra & Langeani, 2015

References

Pristellini Endemic fish of Brazil Taxa named by Marion Durbin Ellis Freshwater fish of Brazil {{Characidae-stub