{{Short description|Genus of fishes}} {{Automatic taxobox | image = Armbrustsalmler (Triportheus angulatus).jpg | image_caption = ''Triportheus angulatus'' | parent_authority = Fowler, 1940 | taxon = Triportheus | authority = Cope, 1872<ref name = "Cof family">{{Cof family|family=Triportheinae|access-date=13 August 2025}}</ref> | type_species = ''Triportheus albus'' | type_species_authority = Cope, 1872<ref name = "Cof family"/> | synonyms = {{Genus list | Chalcinus | Valenciennes, 1850 | Coscinoxyron | Fowler, 1907 }} | synonyms_ref = <ref name = "Cof family"/> }}
'''''Triportheus''''' is a genus of freshwater ray-finned fishes belonging to the family Triportheidae, the hatchet characins or keeled characins. The fishes in this genus are found in South America, including Trinidad, ranging from the Rio de la Plata basin to the basins of the Orinoco and Magdalena.<ref name=Goulding1980>{{cite book | author=Goulding, M | year=1980 | title=The Fishes and the Forest: Explorations in Amazonian Natural History | publisher=University of California Press | pages=131–152 | isbn=0-520-04131-3 }}</ref><ref name=fishbase>{{FishBase genus | genus = Triportheus| month = October | year = 2017}}</ref> Some are migratory.<ref name=Goulding1980/> This genus is classified in the subfamily '''Triportheinae'''.<ref name="CofFF2">{{Cof family|family=Triportheidae|access-date=2 Jun 2025}}</ref>
The largest species is up to {{convert|36|cm|in|abbr=on}} in standard length, but most reach up to about {{2/3}} of that size or less.<ref name=fishbase/> They somewhat resemble larger, more elongated hatchetfish, including a keeled chest and large pectoral fins.<ref name=Goulding1980/> 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.<ref name=Goulding1980/> Seeds eaten by ''Triportheus'' are sometimes crushed, but may also pass undamaged through the fish, making them potential seed dispersers.<ref name=Goulding1980/>
==Species== [[File:Striated Heron, Poconé - Mato Grosso, 78175-000, Brasil imported from iNaturalist photo 229130772.jpg|thumb|Striated heron eating a ''Triportheus'']] The following species are assigned to this genus:<ref name = "Cof genus">{{Cof genus|genus=Triportheus|access-date=13 August 2025}}</ref>
{{Linked species list | Triportheus albus | Cope, 1872 | Triportheus angulatus | (Spix & Agassiz, 1829) | Triportheus auritus | (Valenciennes, 1850) | Triportheus brachipomus | (Valenciennes, 1850) | Triportheus claudiae | Lopes & Carvalho, 2024 | Triportheus culter | (Cope, 1872) | Triportheus curtus | (Garman, 1890) | Triportheus guentheri | (Garman, 1890) | Triportheus magdalenae | (Steindachner, 1878) | Triportheus nematurus | (Kner, 1858) | Triportheus orinocensis | {M. C. S. L. Malabarba, 2004 | Triportheus pantanensis | M. C. S. L. Malabarba, 2004 | Triportheus pictus | (Garman, 1890) | Triportheus rotundatus | (Jardine, 1841) | Triportheus signatus | (Garman, 1890) | Triportheus trifurcatus | (Castelnau, 1855) | Triportheus venezuelensis | M. C. S. L. Malabarba, 2004 }}
==References== {{Reflist}}
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Category:Triportheinae Category:Characiformes genera Category:Taxa named by Edward Drinker Cope
{{Characiformes-stub}}