''Hoplias australis'' is a predatory freshwater characin fish of the southern

Neotropics The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physically, it includes the tropical terrestrial ecoregions of the Americas and the entire South American temperate zone. Definition In bioge ...

Distribution

Southern South America, throughout the

Rio Uruguay The Uruguay River ( es, Río Uruguay, ; pt, Rio Uruguai, ) is a major river in South America. It flows from north to south and forms parts of the boundaries of Brazil, Argentina, and Uruguay, separating some of the Argentine provinces of La M ...

basin, including its tributary Rio Negro, Uruguay where it is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

Taxonomy

Osvaldo Oyakawa and George Mattox described ''Hoplias austalis'' at the same time as ''

Hoplias curupira ''Hoplias curupira'', also known as the black wolf-fish, has a wide distribution in the Amazon basin but was described as recently as 2009. Taxonomy ''Hoplias curupira'' was first formally described in 2009 by the Brazilian zoologists Osvaldo ...

''.

References

Fish of South America Erythrinidae Fish described in 2009 {{Characiformes-stub