The Rio Grande darter (''Etheostoma grahami'') is a small species of ray-finned fish, a darter from the

subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end subfamily botanical names with "-oideae", and zoologi ...

Etheostomatinae Etheosomatidae is a species rich subfamily of freshwater ray-finned fish, the members of which are commonly known as the darters. The subfamily is part of the family Percidae which also includes the perches, ruffes and pikeperches. The famil ...

, part of the family Percidae which includes the perches, ruffs and pike-perches. It is endemic to the lower

Rio Grande The Rio Grande ( and ), known in Mexico as the Río Bravo del Norte or simply the Río Bravo, is one of the principal rivers (along with the Colorado River) in the southwestern United States and in northern Mexico. The length of the Rio G ...

drainage of the United States and Mexico. It inhabits riffles over substrates of gravel or rubble. This species can reach a length of , though most only reach about . The Rio Grande darter was first formally described as ''Oligocephalus grahami'' in 1859 by the

French French (french: français(e), link=no) may refer to: * Something of, from, or related to France ** French language, which originated in France, and its various dialects and accents ** French people, a nation and ethnic group identified with Franc ...

zoologist Charles Frédéric Girard (1822-1895) with the

type locality Type locality may refer to: * Type locality (biology) * Type locality (geology) See also * Local (disambiguation) * Locality (disambiguation) {{disambiguation ...

given as the Devils River in Texas. The

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honors the

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soldier and topographer James Duncan Graham (1795-1865), who led the expedition on which the

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was collected by John H. Clark.

References

Etheostoma Fish described in 1859 Taxonomy articles created by Polbot {{Percidae-stub