''Platystomatichthys sturio'' is the only

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

in the

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 ...

''Platystomatichthys'' of the

catfish Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive ...

( order Siluriformes)

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Pimelodidae 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 kn ...

. It is sometimes called the sturgeon catfish. This species occurs in the Amazon Basin and reaches a length of about TL. ''Platystomatichthys'' 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'', ''

Duopalatinus ''Duopalatinus'' is a small genus of long-whiskered catfishes native to South America. Species There are currently two recognized species in this genus: * '' Duopalatinus emarginatus'' (Valenciennes, 1840) * '' Duopalatinus peruanus'' Eigenmann ...

'', '' 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 ...

'', 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 ...

''.

References

Pimelodidae Fish of South America Fish of Brazil Fish of Ecuador Fish of Peru Fish of Venezuela Fish of the Amazon basin Taxa named by Pieter Bleeker Monotypic ray-finned fish genera {{catfish-stub