''Hoplias microcephalus'' is a species of trahiras.''Hoplias microcephalus''
at www.fishbase.org. It is a

tropical The tropics are the regions of Earth surrounding the Equator. They are defined in latitude by the Tropic of Cancer in the Northern Hemisphere at N and the Tropic of Capricorn in the Southern Hemisphere at S. The tropics are also referred to ...

benthopelagic The demersal zone is the part of the sea or ocean (or deep lake) consisting of the part of the water column near to (and significantly affected by) the seabed and the benthos. The demersal zone is just above the benthic zone and forms a layer of ...

freshwater fish Freshwater fish are those that spend some or all of their lives in fresh water, such as rivers and lakes, with a salinity of less than 1.05%. These environments differ from marine conditions in many ways, especially the difference in levels of ...

which is known to inhabit the São Francisco River 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 ...

. Males can reach a maximum length of 35.6 centimetres. ''H. microcephalus'' was originally described by Louis Agassiz in 1829, under the genus ''Erythrinus''.Spix, J. B. von and L. Agassiz 1829-31 ef. 13''Selecta genera et species piscium quos in itinere per Brasiliam annos MDCCCXVII-MDCCCXX jussu et auspiciis Maximiliani Josephi I.... colleget et pingendso curavit Dr J. B. de Spix.... Monachii. Part 1: i-xvi + i-ii + 1-82, Pls. 1-48;, Part 2: 83-138, Pls. 49-101. It was listed as a valid species of ''

Hoplias ''Hoplias'' is a genus of fish in the family Erythrinidae found in Central and South America. Species There are currently 13 recognized species in this genus: * '' Hoplias aimara'' (Valenciennes, 1847) * '' Hoplias australis'' Oyakawa & Mat ...

'' by O.T. Oyakawa in 2003.Oyakawa, O.T. 2003 Erythrinidae (Trahiras). p. 238-240. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil.

References

External links

''Hoplias microcephalus''
at www.fishwise.co.za
''Hoplias microcephalus''
at

ITIS The Integrated Taxonomic Information System (ITIS) is an American partnership of federal agencies designed to provide consistent and reliable information on the taxonomy of biological species. ITIS was originally formed in 1996 as an interagen ...

Erythrinidae Taxa_named_by_Louis_Agassiz Fish described in 1829 {{Characiformes-stub