''Xenurobrycon polyancistrus'' is a species of characid fish of the subfamily Glandulocaudinae. A freshwater fish, it is the smallest species of

characin Characiformes is an order of ray-finned fish, comprising the characins and their allies. Grouped in 18 recognized families, more than 2000 different species are described, including the well-known piranha and tetras.; Buckup P.A.: "Relationshi ...

in its family and order. Adults can grow up to 1.4 cm long.

Distribution

Found in the gallery forest pools adjacent to rivers in savannah areas of the

Rio Mamore Rio or Río is the Portuguese, Spanish, Italian, and Maltese word for "river". When spoken on its own, the word often means Rio de Janeiro, a major city in Brazil. Rio or Río may also refer to: Geography Brazil * Rio de Janeiro * Rio do Sul, a ...

and

Rio Isiboro Rio or Río is the Portuguese, Spanish, Italian, and Maltese word for "river". When spoken on its own, the word often means Rio de Janeiro, a major city in Brazil. Rio or Río may also refer to: Geography Brazil * Rio de Janeiro * Rio do Sul, a ...

drainages in

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

. It is also found in the Río Madre de Dios basin in

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

Discovery

It was found among a collection of fishes from Bolivia sent by Gerard Loubens of the Office de la Recherche Scientifique et Technique Outre-Mer, Laboratoire d'Ichthyologie de l'Universite de Trinidad, Estado Beni, Bolivia.

References

Characidae Fish of Bolivia Freshwater fish of Peru Fish of the Amazon basin Taxa named by Stanley Howard Weitzman Fish described in 1987 {{characiformes-stub