Cash also performed a series of concerts for inmates there during the 1960s, even recording live album At Folsom Prison in the facility.

The breed is one of 14 new types of tarantula discovered by biologists in the southern US. Dr Chris Hamilton tells the BBC: "It's found along the foothills of the western Sierra Nevada mountains, and one of the places that's there is Folsom Prison. It's a perfect name. It fits the spider - it's found around Folsom and the males are predominantly all black, so it fits his image.