Sibotherium is an extinct genus of ground sloth in the family Megatheriidae that lived in what is now Costa Rica during the Late Miocene.

[1] The genus name, Sibotherium is derived from Sibö, the good creator in Bribri mythology, and therion, Greek for "beast".

In the beginning Sibö made the Earth, the land, the animals and the plants according to the myths of the Bribri, the original inhabitants of southern Costa Rica.

This name was chosen because Sibotherium was one of the first South American migrants to shape the new faunal composition of Central America.

It is believed that Sibotherium or its ancestor reached southern Central America over a temporary land bridge during a period of sea level decline, tectonic rise or a combination of both.