As Wikipedia dryly notes,
A paleotoca is an underground shelter (tunnel, burrow, lair, etc.) excavated by extinct paleo-vertebrate megafauna (i.e., giant mammals) that lived in the prehistoric era.
And then, you take a look at a few examples.
These examples are from Brazil, and were likely created by extinct species of giant sloths or armadillos,
[Heinrich]Frank believes the biggest burrows – measuring up to five feet in diameter – were dug by ground sloths. He and his colleagues consider as possibilities several genera that once lived in South America and whose fossil remains suggest adaptation for serious digging: Catonyx, Glossotherium and the massive, several-ton Lestodon. Others believe that extinct armadillos such as Pampatherium, Holmesina or Propraopus, though smaller than the sloths, were responsible for even the largest burrows.
Paleotoca in Portuguese. Palaeoburrow in English. They are galleries excavated by giant armadillos and giant sloths. They were not excavated by gliptodonts. Please login to the site http://www.ufrgs.br/paleotocas/English.htm
Thank you for the correction, and the link. I have updated the post to fix the error.