Deuterodon

{{Short description|Genus of fishes}}

{{Automatic taxobox

| image = FMIB 52379 Deuterodon iguape Eigenmann (Type).jpeg

| image_caption = Deuterodon iguape

| taxon = Deuterodon

| authority = C. H. Eigenmann, 1907

| synonyms = Probolodus

}}

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.{{FishBase genus | genus = Deuterodon| month = January| year = 2023}}{{Cof genus |Deuterodon|access-date=3 January 2018}} These are small fish that reach up to {{cvt|12.6|cm}} in total length. They are omnivores with a specialized mouth structure that allows them to scrape algae and debris off bedrock.{{cite journal|author=Silva Gonçalves, C.|author2= C. Cestari |year=2018|title=Grazing of the lambari fish Deuterodon iguape is associated with mouth morphology|journal=Zoologischer Anzeiger |volume=274|pages=127–130|doi= 10.1016/j.jcz.2018.01.005 |bibcode= 2018ZooAn.274..127D |hdl= 11449/175730 |hdl-access=free}}

Species formerly considered members of the genera Probolodus and Myxiops were considered to be members of Deuterodon by modern researchers, following a thorough phyletic review of several characid genera in 2020,{{Cite journal |last1=Terán |first1=Guillermo E |last2=Benitez |first2=Mauricio F |last3=Mirande |first3=J Marcos |date=2020-04-11 |title=Opening the Trojan horse: phylogeny of Astyanax, two new genera and resurrection of Psalidodon (Teleostei: Characidae) |url=https://academic.oup.com/zoolinnean/advance-article/doi/10.1093/zoolinnean/zlaa019/5819054 |journal=Zoological Journal of the Linnean Society |language=en |doi=10.1093/zoolinnean/zlaa019 |issn=0024-4082|url-access=subscription }} though Myxiops was revalidated later.