Dario is named for the Nicaraguan poet Rubén Darío, who lived from 1867 to 1916.

[2] Darío lies on the western rim of the much larger Aneirin crater.

The highest of several scarps that cut across the floor of Darío corresponds with the rim of Aneirin.

[3] Hollows are present within Darío, scattered across the crater floor.

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