Very Old Wool Rug/Blanket--Need Help Identifying

This is an old wool blanket with a repeating design of the multi-legged creature you can see in the picture. The colors repeat themselves throughout but are used interchangeably in different body parts. The design appears to us reminiscent of native or South American origin. Overall roughly 5 feet square in size. Some of our textile friends believe it's more than 100 years old, but we have no clue of the origin. Anyone have an opinion?