Distribution
The species of Corydoras usually have more restricted areas of endemism than other callichthyids, but the area of distribution of the entire genus almost equals the area of distribution of the family, except for Panama where Corydoras is not present. Corydoras species are distributed east of the Andes to the Atlantic coast, from Trinidad to the Río de la Plata drainage in northern Argentina. The genus is also widely distributed in South America from the Magdalena River basin, in Colombia, and occurs in a variety of environments.
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