''Deuterodon'' is a genus of

characin Characiformes is an order of ray-finned fish, comprising the characins and their allies. Grouped in 18 recognized families, more than 2000 different species are described, including the well-known piranha and tetras.; Buckup P.A.: "Relationsh ...

s from river basins in southern and

southeastern Brazil The Southeast Region of Brazil ( ) is composed of the states of Espírito Santo, Minas Gerais, Rio de Janeiro (state), Rio de Janeiro and São Paulo State, São Paulo. It is the richest region of the country, responsible for approximately 53% of t ...

(

Rio Grande do Sul Rio Grande do Sul (, ; ; "Great River of the South") is a Federative units of Brazil, state in the South Region, Brazil, southern region of Brazil. It is the Federative units of Brazil#List, fifth-most populous state and the List of Brazilian s ...

Espírito Santo Espírito Santo (; ) is a state in southeastern Brazil. Its capital is Vitória, and its largest city is Serra. With an extensive coastline, the state hosts some of the country's main ports, and its beaches are significant tourist attracti ...

), with a single species of uncertain

taxonomic 280px, Generalized scheme of taxonomy Taxonomy is a practice and science concerned with classification or categorization. Typically, there are two parts to it: the development of an underlying scheme of classes (a taxonomy) and the allocation ...

status, ''D. potaroensis'', from Guyana. These are small fish that reach up to in

total length Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured f ...

. They are

omnivore An omnivore () is an animal that regularly consumes significant quantities of both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize t ...

s with a specialized mouth structure that allows them to scrape

algae Algae ( , ; : alga ) is an informal term for any organisms of a large and diverse group of photosynthesis, photosynthetic organisms that are not plants, and includes species from multiple distinct clades. Such organisms range from unicellular ...

and debris off bedrock. 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, though ''

Myxiops ''Myxiops'' is a genus of fish in the subfamily Stygichthyinae of family Acestrorhamphidae. The name is an allusion to the slime that the fish produces, from the Greek (mýxa) meaning "mucus". Formerly monotypic including only ''M. aphos'', and ...

'' was revalidated later.

Species

The following 22 species are recognized in the genus ''Deuterodon'': * '' 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 Franz Steindachner (11 November 1834 in Vienna – 10 December 1919 in Vienna) was an Austrian zoologist, ichthyologist, and herpetologist. He published over 200 papers on fishes and over 50 papers on reptiles and amphibians. Steindachner descri ...

, 1907) * '' Deuterodon luetkenii'' (Boulenger, 1887) * '' Deuterodon mutator'' (Eigenmann, 1909) * '' Deuterodon oyakawai'' (Santos & Castro, 2014) * '' Deuterodon parahybae'' C. H. Eigenmann, 1908 * '' Deuterodon pedri'' Eigenmann, 1908 * '' Deuterodon ribeirae'' (Eigenmann, 1911) * '' Deuterodon rosae'' (Steindachner, 1908) * '' Deuterodon sazimai'' (Santos & Castro, 2014) * ''

Deuterodon singularis ''Deuterodon'' is a genus of characins from river basins in South Region, Brazil, southern and southeastern Brazil (Rio Grande do Sul to Espírito Santo), with a single species of uncertain Taxonomy (biology), taxonomic status, ''D. potaroensis'' ...

'' 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) ;''

Incertae sedis or is a term used for a taxonomy (biology), taxonomic group where its broader relationships are unknown or undefined. Alternatively, such groups are frequently referred to as "enigmatic taxa". In the system of open nomenclature, uncertainty ...

'' * '' Deuterodon potaroensis'' C. H. Eigenmann, 1909

References

Taxa named by Carl H. Eigenmann Fish of South America {{Characidae-stub