Deuterodon Explained

Deuterodon is a genus of characins from river basins in southern and southeastern Brazil (Rio Grande do Sul to Espírito Santo), with a single species of uncertain taxonomic status, D. potaroensis, from Guyana. These are small fish that reach up to in total length. They are omnivores with a specialized mouth structure that allows them to scrape algae and debris off bedrock.^[1]

Species formerly considered members of the genera Probolodus and Myxiops are considered to be members of Deuterodon by modern researchers, following a thorough phyletic review of several characid genera in 2020.^[2]

Species

The following 24 species are recognized in the genus Deuterodon:^[3]

• Deuterodon aphos (Zanata & Akama, 2004)
• Deuterodon burgerai (Zanata & Camelier, 2009)
• Deuterodon giton (Eigenmann, 1908)
• Deuterodon hamatilis (Camelier & Zanata, 2014)
• Deuterodon hastatus (Myers, 1928)
• Deuterodon heterostomus (Eigenmann, 1911)
• Deuterodon iguape C. H. Eigenmann, 1907
• Deuterodon intermedius (Eigenmann, 1908)
• Deuterodon janeiroensis (Eigenmann, 1908)
• Deuterodon langei Travassos, 1957
• Deuterodon longirostris (Steindachner, 1907)
• Deuterodon luetkenii (Boulenger, 1887)
• Deuterodon mutator (Eigenmann, 1909)
• Deuterodon oyakawai (Santos & Castro, 2014)
• Deuterodon parahybae C. H. Eigenmann, 1908
• Deuterodon pelecus (Bertaco & Lucena, 2006)
• Deuterodon potaroensis C. H. Eigenmann, 1909
• Deuterodon ribeirae (Eigenmann, 1911)
• Deuterodon rosae (Steindachner, 1908)
• Deuterodon sazimai (Santos & Castro, 2014)
• Deuterodon singularis Z. M. S. de Lucena & C. A. S. de Lucena, 1992
• Deuterodon stigmaturus (A. L. Gomes, 1947)
• Deuterodon supparis Z. M. S. de Lucena & C. A. S. de Lucena, 1992
• Deuterodon taeniatus (Jenyns, 1842)

Notes and References

1. Silva Gonçalves, C.; C. Cestari (2018). Grazing of the lambari fish Deuterodon iguape is associated with mouth morphology. Zoologischer Anzeiger 274: 127-130.
2. Terán . Guillermo E . Benitez . Mauricio F . Mirande . J Marcos . 2020-04-11 . Opening the Trojan horse: phylogeny of Astyanax, two new genera and resurrection of Psalidodon (Teleostei: Characidae) . Zoological Journal of the Linnean Society . en . 10.1093/zoolinnean/zlaa019 . 0024-4082.
3. Silva, P.C.; M.C. Malabarba; L.R. Malabarba (2017). Using ancient DNA to unravel taxonomic puzzles: the identity of Deuterodon pedri (Ostariophysi: Characidae). Neotrop. ichthyol. 15(1).