''Rhinodoras armbrusteri'' is a species of

thorny catfish The Doradidae are a family of catfishes also known as thorny catfishes, raphael catfishes or talking catfishes. These fish are native to South America, primarily the Amazon basin and the Guianas. Doradids are omnivorous. Taxonomy As of 2007, 3 ...

known from the

Takutu River The Takutu River (Takatu River, Tacutu River) is a river in the Upper Takutu-Upper Essequibo Region of Guyana and Roraima in Brazil. It forms part of the boundary between the two countries. The confluence of the Takutu and Uraricoera Rivers form ...

and

Ireng River The Ireng River (or Maú River, generally used in Portuguese) forms part of Guyana's western border with Brazil. It flows through the valleys of the Pakaraima Mountains for most of its length. It is the only major river in Guyana which flows from ...

s that drains into the upper Rio Branco in

Guyana Guyana ( or ), officially the Cooperative Republic of Guyana, is a country on the northern mainland of South America. Guyana is an indigenous word which means "Land of Many Waters". The capital city is Georgetown. Guyana is bordered by the ...

and

Roraima Roraima (, ) is one of the 26 states of Brazil. Located in the country's North Region, it is the northernmost and most geographically and logistically isolated state in Brazil. It is bordered by the state of Pará to the southeast, Amazonas ...

State,

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 ...

; it is also known from the Rupununi River in the Essequibo River basin in southwestern Guyana. This species grows to a length of SL.

References

* Doradidae Vertebrates of Guyana Fish of Brazil Fish of South America Fish described in 2008 {{Doradidae-stub