''Duopalatinus'' is a small

genus 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 nom ...

long-whiskered catfish The Pimelodidae, commonly known as the long-whiskered catfishes, are a family of catfishes (order Siluriformes). Taxonomy The family Pimelodidae has undergone much revision. Currently, it contains about 30 genera and about 90 recognized and know ...

es native to

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout ...

Species

There are currently two recognized species in this genus: * '' Duopalatinus emarginatus'' (

Valenciennes Valenciennes (, also , , ; nl, label=also Dutch, Valencijn; pcd, Valincyinnes or ; la, Valentianae) is a commune in the Nord department, Hauts-de-France, France. It lies on the Scheldt () river. Although the city and region experienced a ...

, 1840) * '' Duopalatinus peruanus''

Eigenmann Eigenmann is a surname. Notable persons with that surname include: * Andi Eigenmann (born 1990), Filipino actress * Carl H. Eigenmann (1863–1927), German–American ichthyologist, husband of Rosa Eigenmann * Eduardo de Mesa Eigenmann, birth name ...

Allen Allen, Allen's or Allens may refer to: Buildings * Allen Arena, an indoor arena at Lipscomb University in Nashville, Tennessee * Allen Center, a skyscraper complex in downtown Houston, Texas * Allen Fieldhouse, an indoor sports arena on the Unive ...

, 1942 ''Duopalatinus'' is classified under the "'' Calophysus-

Pimelodus ''Pimelodus'' is a genus of fish in the family (biology), family Pimelodidae native to Central America, Central and South America. Species There are currently 33 recognized species in this genus: * ''Pimelodus absconditus'' María de las Mercede ...

'' clade". Within this clade, it is considered a part of the "''Pimelodus''-group" of Pimelodids, which also includes ''Pimelodus'', '' Exallodontus'', '' Cheirocerus'', '' Iheringichthys'', '' Bergiaria'', '' Bagropsis'', '' Parapimelodus'', ''

Platysilurus ''Platysilurus'' is a genus of long-whiskered catfishes native to South America. Taxonomy ''Platysilurus'' is classified under the "'' Calophysus-Pimelodus'' clade". Within this clade, it is considered a part of the "Pimelodus-group" of Pimelo ...

'', '' Platystomatichthys'', and ''

Propimelodus ''Propimelodus'' is a genus of South American catfish of the family Pimelodidae. Taxonomy The type species of this genus, ''P. eigenmanni'', was first described in 1946 under the genus ''Pimelodus''. In 2002, the genus ''Propimelodus'' was descr ...

''. ''Duopalatinus'' species are distributed in

. ''D. emarginatus'' inhabits the São Francisco River basin. ''D. peruanus'' is found in the

Amazon Amazon most often refers to: * Amazons, a tribe of female warriors in Greek mythology * Amazon rainforest, a rainforest covering most of the Amazon basin * Amazon River, in South America * Amazon (company), an American multinational technolog ...

and

Orinoco River The Orinoco () is one of the longest rivers in South America at . Its drainage basin, sometimes known as the Orinoquia, covers , with 76.3 percent of it in Venezuela and the remainder in Colombia. It is the fourth largest river in the wor ...

basins. ''Duopalatinus'' species grow to about 14–15 centimetres (5.5–5.9 in) SL.

References

Pimelodidae Fish of South America Fish of the Amazon basin Catfish genera Taxa named by Carl H. Eigenmann Taxa named by Rosa Smith Eigenmann Freshwater fish genera {{catfish-stub