''Cynodonichthys'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of freshwater

killifish A killifish is any of various oviparous (egg-laying) cyprinodontiform fish (including families Aplocheilidae, Cyprinodontidae, Fundulidae, Profundulidae and Valenciidae). All together, there are 1,270 species of killifish, the biggest famil ...

in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Rivulidae The Rivulidae are a family of killifishes in the order Cyprinodontiformes. They are commonly known as rivulids, South American killifish or New World killifish. The latter names are slightly misleading, however, as they are neither restricted to ...

. They are found in Middle America, ranging from southern Mexico (north to

Oaxaca ) , population_note = , population_rank = 10th , timezone1 = CST , utc_offset1 = −6 , timezone1_DST = CDT , utc_offset1_DST = −5 , postal_code_type = Postal ...

and the

Yucatán Peninsula The Yucatán Peninsula (, also , ; es, Península de Yucatán ) is a large peninsula in southeastern Mexico and adjacent portions of Belize and Guatemala. The peninsula extends towards the northeast, separating the Gulf of Mexico to the north ...

), through Central America (where most species live), to Colombia (in the northwest and the

Magdalena River The Magdalena River ( es, Río Magdalena, ; less commonly ) is the main river of Colombia, flowing northward about through the western half of the country. It takes its name from the biblical figure Mary Magdalene. It is navigable through much o ...

basin).Vermeulen, F.B.M. (2013): Four new species of ''Rivulus'' Poey, 1860, subgenus ''Cynodonichthys'' Meek, 1904 (Teleostei: Cyprinodontiformes: Rivulidae) from the Magdalena River Basin, Central Colombia, including notes on ''Rivulus (Cynodonichthys) elegans'' Steindachner, 1880. ''Killi-Data Series, 2013: 42-63.'' They are non-annual killifish (similar to relatives such as ''

Anablepsoides ''Anablepsoides'' is a genus of killifish in the family Rivulidae native to tropical South America and the Lesser Antilles. The majority are from the Amazon and Orinoco basins, as well as freshwater systems in the Guiana Shield, but a few spe ...

'', ''

Atlantirivulus ''Atlantirivulus'' is a genus of fishes in the family Rivulidae. They are endemic to shallow swamps, creeks, streams and pools in the Atlantic Forest in southeastern Brazil, ranging from Rio de Janeiro to Santa Catarina.Costa, W.J.E.M. (2014)F ...

'', ''

Laimosemion ''Laimosemion'' is a genus of fish in the family Rivulidae from the Amazon basin and basins in the Guiana Shield in tropical South America. They mostly inhabit small streams, creeks, swamps and pools in lowlands, but locally occur to an altitud ...

'' and ''

Melanorivulus ''Melanorivulus'' is a genus of South American freshwater fish in the family Rivulidae. Most species are endemic to the Río de la Plata, eastern Amazon (west to Tapajós basin), Tocantins– Araguaia and São Francisco basins in Brazil, but ...

'') and inhabit small forest streams from the lowlands to an altitude of . They are small fish, up to in

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

depending on the exact species.

Species

Until 2011, ''Cynodonichthys'' were included in ''

Rivulus ''Rivulus'' is a genus of small freshwater fish in the Cyprinodontiformes family Rivulidae. It was traditionally considered to be the largest genus in its family; however, the genus's size is currently in dispute. Wilson J. E. Costa split this ge ...

'', and some prefer to maintain them in that genus. If recognized as a valid genus, there are currently 32 species in ''Cynodonichthys'': * ''

Cynodonichthys azurescens ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), to Col ...

'' (

Vermeulen Vermeulen is a Dutch toponymic or occupational surname, meaning "from the (wind/water) mill" (modern Dutch ''molen''). It is a contraction of the surname Van der Meulen. In the Netherlands 20,633 people carried the name in 2007, making it the 30th ...

, 2013) * ''

Cynodonichthys birkhahni ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), to Col ...

'' ( Berkenkamp & Etzel, 1992) * ''

Cynodonichthys boehlkei ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), to Col ...

'' (

Huber Huber is a German-language surname. It derives from the German word ''Hube'' meaning hide, a unit of land a farmer might possess, granting them the status of a free tenant. It is in the top ten most common surnames in the German-speaking world, ...

& Fels, 1985) * ''

Cynodonichthys brunneus ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), to Col ...

'' ( Meek &

Hildebrand Hildebrand is a character from Germanic heroic legend. ''Hildebrand'' is the modern German form of the name: in Old High German it is ''Hiltibrant'' and in Old Norse ''Hildibrandr''. The word ''hild'' means "battle" and ''brand'' means "sword". ...

, 1913) * ''

Cynodonichthys chucunaque ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), to Col ...

'' ( Breder, 1925) * ''

Cynodonichthys degreefi ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), to Col ...

'' ( Collier, 2016)Collier, G.E. (2016): The ''Rivulus'' of Guatemala: ''Rivulus tenuis'' Meek, 1904, ''Rivulus godmani'' Regan, 1907 and ''Rivulus degreefi'' sp. nov. ''Journal of the American Killifish Association, 49 (2): 34-47.'' * ''

Cynodonichthys elegans ''Cynodonichthys elegans'' is a species of killifish from the family Rivulidae which is found in temporary pools in the Cauca River basin and in the San Juan River in the Chocó Department in Colombia. See also * List of fishes in the Magdal ...

'' ( Steindachner, 1880) * ''

Cynodonichthys frommi ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), to Co ...

'' ( Berkenkamp & Etzel, 1993) * '' Cynodonichthys fuscolineatus'' ( W. A. Bussing, 1980) * ''

Cynodonichthys glaucus ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' ( W. A. Bussing, 1980) * ''

Cynodonichthys godmani ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), to Co ...

'' (

Regan The family name Regan, along with its cognates O'Regan, O Regan, Reagan, and O'Reagan, is an Anglicized form of the Irish surname Ó Riagáin or Ó Ríogáin, from Ua Riagáin. The meaning is likely to have originated in ancient Gaelic ''ri' ...

, 1907) * ''

Cynodonichthys hendrichsi ''Cynodonichthys'' is a genus of freshwater killifish in the family (biology), family Rivulidae. They are found in Middle America (Americas), Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Centr ...

'' (

Álvarez Álvarez or Álvares may refer to: People * Álvarez (surname), Spanish surname Places * Alvares (river), a river in northern Spain * Alvares (ski resort), in Iran * Alvares, Iran * Alvares, Portugal * Álvarez, Santa Fe, a town in the province o ...

& Carranza, 1952) * '' Cynodonichthys hildebrandi'' ( G. S. Myers, 1927) * ''

Cynodonichthys isthmensis ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' ( Garman, 1895) * '' Cynodonichthys kuelpmanni'' ( Berkenkamp & Etzel, 1993) * '' Cynodonichthys leucurus'' ( Fowler, 1944) * ''

Cynodonichthys magdalenae ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), to Co ...

'' ( C. H. Eigenmann &

Henn Henn is a both a surname and an Estonian masculine given name. Notable people with the surname include: ;As a given name: * Henn-Ants Kurg (1898–1943), Estonian military colonel and diplomat * Henn Pärn (born 1941), Estonian politician * ...

, 1916) * '' Cynodonichthys monikae'' ( Berkenkamp & Etzel, 1995) * '' Cynodonichthys montium'' (

, 1938) * ''

Cynodonichthys myersi ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' ( C. L. Hubbs, 1936) * ''

Cynodonichthys pacificus ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' (

, 1992) * ''

Cynodonichthys pivijay ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' (

, 2013) * ''

Cynodonichthys ribesrubrum ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' (

, 2013) * ''

Cynodonichthys rubripunctatus ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' ( W. A. Bussing, 1980) * '' Cynodonichthys siegfriedi'' ( W. A. Bussing, 1980) * ''

Cynodonichthys sucubti ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' ( Breder, 1925) * ''

Cynodonichthys tenuis ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' Meek, 1904 * ''

Cynodonichthys uroflammeus ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' ( W. A. Bussing, 1980) * ''

Cynodonichthys villwocki ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), to Co ...

'' ( Berkenkamp & Etzel, 1997) * ''

Cynodonichthys wassmanni ''Cynodonichthys'' is a genus of freshwater killifish in the family (biology), family Rivulidae. They are found in Middle America (Americas), Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Centr ...

'' ( Berkenkamp & Etzel, 1999) * '' Cynodonichthys weberi'' (

, 1992) * ''

Cynodonichthys xi ''Cynodonichthys'' is a genus of freshwater killifish in the family Rivulidae. They are found in Middle America, ranging from southern Mexico (north to Oaxaca and the Yucatán Peninsula), through Central America (where most species live), ...

'' (

, 2013)

References

Rivulidae Freshwater fish genera Taxa named by Seth Eugene Meek {{Cyprinodontiformes-stub