''Acentronichthys leptos'' 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 ...

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) in the

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 ...

''Acentronichthys'' of the

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

Heptapteridae The Heptapteridae, or three-barbeled catfishes, are a family of catfish that originate from the Americas. Most species are restricted to South America, but '' Imparfinis lineatus'', '' Nemuroglanis panamensis'' and '' Pimelodella chagresi'' are ...

. This species occurs in coastal streams in

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 ...

from

Rio de Janeiro Rio de Janeiro ( , , ; literally 'River of January'), or simply Rio, is the capital of the state of the same name, Brazil's third-most populous state, and the second-most populous city in Brazil, after São Paulo. Listed by the GaWC as a b ...

to Santa Catarina State, in

São Mateus, Espírito Santo São Mateus is a Municipalities of Brazil, municipality located in the States of Brazil, Brazilian state of Espírito Santo. Its population was estimated at 132,642 in 2020, and its area is 2,346 km². São Mateus is located at 36 meters abo ...

State and on

Leopoldina, Minas Gerais Leopoldina is a municipality in the Brazilian state of Minas Gerais. , it has a population of 52,640. It is situated in the southeastern Zona da Mata mesoregion of the state. The municipality contains the Lapinha Biological Reserve, a strict ...

. This species grows to in SL.

References

Heptapteridae Monotypic freshwater fish genera Catfish genera Catfish of South America Freshwater fish of Brazil Taxa named by Carl H. Eigenmann Taxa named by Rosa Smith Eigenmann {{catfish-stub