This contribution contains the three-dimensional digital models of a part of the dental fossil material (the large specimens) of caviomorph rodents, discovered in late middle Miocene detrital deposits of the TAR-31 locality in Peruvian Amazonia (San Martín, Peru). These fossils were described, figured and discussed in the following publication: Boivin, Marivaux et al. (2021), Late middle Miocene caviomorph rodents from Tarapoto, Peruvian Amazonia. PLoS ONE 16(11): e0258455. https://doi.org/10.1371/journal.pone.0258455