''Triportheus'' is a genus of
characiform fishes from
South America, including
Trinidad, ranging from the
Rio de la Plata basin to the basins of the
Orinoco
The Orinoco () is one of the longest rivers in South America at . Its drainage basin, sometimes known as the Orinoquia, covers , with 76.3 percent of it in Venezuela and the remainder in Colombia. It is the fourth largest river in the wor ...
and
Magdalena.
Some are
migratory.
[
The largest species is up to in ]standard length
Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology.
Overall length
* Standard length (SL) is the length of a fish m ...
, but most reach up to about of that size or less.[ They somewhat resemble larger, more elongated hatchetfish, including a keeled chest and large pectoral fins.][ This leads to the common names narrow hatchetfish and elongate hatchetfish, the latter also used more specifically for ''T. elongatus''. Their shape is an adaption for living near the water surface where they find most of their food such as fruits, seeds, leaves, flowers, other plant material, invertebrates (insects, spiders and alike) and occasionally small fish.][ Seeds eaten by ''Triportheus'' are sometimes crushed, but may also pass undamaged through the fish, making them potential seed dispersers.][
]
Species
There are currently 18 recognized species in this genus:[
* '' Triportheus albus'' Cope, 1872
* '' Triportheus angulatus'' ( Spix & ]Agassiz
Jean Louis Rodolphe Agassiz ( ; ) FRS (For) FRSE (May 28, 1807 – December 14, 1873) was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history.
Spending his early life in Switzerland, he rec ...
, 1829)
* '' Triportheus auritus'' ( Valenciennes, 1850)
* '' Triportheus brachipomus'' ( Valenciennes, 1850)
* '' Triportheus culter'' ( Cope, 1872)
* '' Triportheus curtus'' ( Garman, 1890)
* '' Triportheus elongatus'' ( Günther, 1864) (Elongate hatchetfish)
* '' Triportheus guentheri'' ( Garman, 1890)
* ''Triportheus magdalenae
''Triportheus'' is a genus of characiform fishes from South America, including Trinidad, ranging from the Rio de la Plata basin to the basins of the Orinoco and Magdalena. Some are migratory.
The largest species is up to in standard leng ...
'' (Steindachner
Franz Steindachner (11 November 1834 in Vienna – 10 December 1919 in Vienna) was an Austrian zoologist, ichthyologist, and herpetologist. He published over 200 papers on fishes and over 50 papers on reptiles and amphibians. Steindachner describ ...
, 1878)
* ''Triportheus nematurus
''Triportheus'' is a genus of characiform fishes from South America, including Trinidad, ranging from the Rio de la Plata basin to the basins of the Orinoco and Magdalena River, Magdalena. Some are Fish migration, migratory.
The largest species ...
'' ( Kner, 1858)
* ''Triportheus orinocensis
''Triportheus'' is a genus of characiform fishes from South America, including Trinidad, ranging from the Rio de la Plata basin to the basins of the Orinoco and Magdalena. Some are migratory.
The largest species is up to in standard length, ...
'' M. C. S. L. Malabarba, 2004
* ''Triportheus pantanensis
''Triportheus'' is a genus of characiform fishes from South America, including Trinidad, ranging from the Rio de la Plata basin to the basins of the Orinoco and Magdalena. Some are migratory.
The largest species is up to in standard length, ...
'' M. C. S. L. Malabarba, 2004
* '' Triportheus paranensis'' ( Günther, 1874) (Tetra)
* '' Triportheus pictus'' ( Garman, 1890)
* ''Triportheus rotundatus
''Triportheus'' is a genus of characiform fishes from South America, including Trinidad, ranging from the Rio de la Plata basin to the basins of the Orinoco and Magdalena. Some are migratory.
The largest species is up to in standard length, ...
'' (Jardine
Jardine is a surname. Notable people with the surname include:
* Al Jardine (born 1942), member of the Beach Boys
* Alexander Jardine (Medal of Honor) (1874–1949), American Medal of Honor recipient
* Antonio Jardine (born 1988), NCAA college bas ...
, 1841)
* ''Triportheus signatus
''Triportheus'' is a genus of characiform fishes from South America, including Trinidad, ranging from the Rio de la Plata basin to the basins of the Orinoco and Magdalena. Some are migratory.
The largest species is up to in standard length, ...
'' ( Garman, 1890)
* '' Triportheus trifurcatus'' ( Castelnau, 1855)
* ''Triportheus venezuelensis
''Triportheus'' is a genus of characiform fishes from South America, including Trinidad, ranging from the Rio de la Plata basin to the basins of the Orinoco and Magdalena. Some are migratory.
The largest species is up to in standard length, ...
'' M. C. S. L. Malabarba, 2004
References
Characiformes genera
{{Characiformes-stub