Koatse River[2] (also Poatse[1]) is a stream in the Cuyuni-Mazaruni area in Guyana, South America.

[1] A botanical survey of the Koatse River Valley was a part of the Biological Diversity of the Guiana Shield Program of the Smithsonian Institution[3] and the New York Botanical Garden holds plant specimens of earlier collections.

[4]

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