| Hemiodus | |
|---|---|
![]()  | |
| Hemiodus quadrimaculatus | |
| Scientific classification  | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Actinopterygii | 
| Order: | Characiformes | 
| Family: | Hemiodontidae | 
| Genus: | Hemiodus J. P. Müller, 1842  | 
| Synonyms | |
| 
 Hemiodopsis  | |

Hemiodus gracilis
Hemiodus is a genus of halftooths from South America with the greatest species richness in the Amazon Basin, but also found in the Orinoco, Essequibo, Paraná–Paraguay and Parnaíba River basins.[1] Depending on the species involved, these elongate fish reach a length of 7–30 cm (3–12 in).[1]
Species
There are currently 21 recognized species in this genus:[2]
- Hemiodus amazonum (Humboldt, 1821)
 - Hemiodus argenteus Pellegrin, 1909
 - Hemiodus atranalis (Fowler, 1940)
 - Hemiodus goeldii Steindachner, 1908
 - Hemiodus gracilis Günther, 1864
 - Hemiodus huraulti (Géry, 1964)
 - Hemiodus immaculatus Kner, 1858
 - Hemiodus iratapuru Langeani & C. L. R. Moreira, 2013 [3]
 - Hemiodus jatuarana Langeani, 2004
 - Hemiodus langeanii Beltrão & Zuanon, 2012[1]
 - Hemiodus microlepis Kner, 1858
 - Hemiodus orthonops C. H. Eigenmann & C. H. Kennedy, 1903
 - Hemiodus parnaguae C. H. Eigenmann & Henn, 1916
 - Hemiodus quadrimaculatus Pellegrin, 1909 (Barred hemiodus)
 - Hemiodus semitaeniatus Kner, 1858 (Halfline hemiodus)
 - Hemiodus sterni (Géry, 1964)
 - Hemiodus ternetzi G. S. Myers, 1927
 - Hemiodus thayeria J. E. Böhlke, 1955
 - Hemiodus tocantinensis Langeani, 1999
 - Hemiodus unimaculatus (Bloch, 1794)
 - Hemiodus vorderwinkleri (Géry, 1964)
 
References
- 1 2 3 Beltrão, H. & Zuanon, J. (2012): Hemiodus langeanii (Characiformes: Hemiodontidae), a new species from rio Amana, rio Maués-Açú drainage, Amazon basin, Brazil. Neotropical Ichthyology, 10 (2): 255-262.
 - ↑ Froese, Rainer and Pauly, Daniel, eds. (2014). Species of Hemiodus in FishBase. February 2014 version.
 - ↑ Langeani, F. & Moreira, C.R. (2013): Hemiodus iratapuru, a new species of Hemiodontidae from the Rio Jari, Amazon Basin, Brazil (Teleostei, Characiformes). Journal of Fish Biology, 82 (4): 1259–1268.
 
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