''Platystomatichthys sturio'' is the only

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

in the

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

''Platystomatichthys'' of the

catfish Catfish (or catfishes; order (biology), order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Catfish are common name, named for their prominent barbel (anatomy), barbels, which resemble a cat's whiskers, though not ...

(

order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...

Siluriformes)

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 ...

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 know ...

. It is sometimes called the sturgeon catfish. This species occurs in the

Amazon Basin The Amazon basin is the part of South America drained by the Amazon River and its tributary, tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries ...

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 34 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'', ''

Cheirocerus ''Cheirocerus'' is a genus of long-whiskered catfishes native to South America. Species There are currently three recognized species in this genus: * ''Cheirocerus abuelo'' (Leonard Peter Schultz, Schultz, 1944) * ''Cheirocerus eques'' Carl H. E ...

'', '' Iheringichthys'', '' Bergiaria'', '' Bagropsis'', ''

Parapimelodus ''Parapimelodus'' is a small genus of long-whiskered catfishes native to South America. Species There are currently two recognized species in this genus: * '' Parapimelodus nigribarbis'' ( Boulenger, 1889) * '' Parapimelodus valenciennis'' ( Lü ...

'', '' Platysilurus'', and '' Propimelodus''.

References

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