Triportheus

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Triportheus
Armbrustsalmler (Triportheus angulatus).jpg
Triportheus angulatus
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Characiformes
Family: Triportheidae
Subfamily: Triportheinae
Fowler, 1940
Genus: Triportheus
Cope, 1872 [1]
Type species
Triportheus albus
Cope, 1872 [1]
Synonyms [1]

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. [2] [3] Some are migratory. [2] This genus is classified in the subfamily Triportheinae. [4]

The largest species is up to 36 cm (14 in) in standard length, but most reach up to about 23 of that size or less. [3] They somewhat resemble larger, more elongated hatchetfish, including a keeled chest and large pectoral fins. [2] 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. [2] Seeds eaten by Triportheus are sometimes crushed, but may also pass undamaged through the fish, making them potential seed dispersers. [2]

Species

Striated heron eating a Triportheus Striated Heron, Pocone - Mato Grosso, 78175-000, Brasil imported from iNaturalist photo 229130772.jpg
Striated heron eating a Triportheus

The following species are assigned to this genus: [5]

References

  1. 1 2 3 Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Triportheinae". Catalog of Fishes . California Academy of Sciences . Retrieved 13 August 2025.
  2. 1 2 3 4 5 Goulding, M (1980). The Fishes and the Forest: Explorations in Amazonian Natural History. University of California Press. pp. 131–152. ISBN   0-520-04131-3.
  3. 1 2 Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Triportheus". FishBase . October 2017 version.
  4. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Triportheidae". Catalog of Fishes . California Academy of Sciences . Retrieved 2 Jun 2025.
  5. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Triportheus". Catalog of Fishes . California Academy of Sciences . Retrieved 13 August 2025.