Hemiodus

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]

Hemiodus
Hemiodus quadrimaculatus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Characiformes
Family:	Hemiodontidae
Genus:	Hemiodus J. P. Müller, 1842
Synonyms
Hemiodopsis

Hemiodus gracilis

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. 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.
2. Froese, Rainer and Pauly, Daniel, eds. (2014). Species of Hemiodus in FishBase. February 2014 version.
3. 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.