†Amblyrhiza †Clidomys †Elasmodontomys †Quemisia †Xaymaca Heptaxodontidae, rarely called giant hutia, is an extinct family of large rodents known from fossil and subfossil material found in the West Indies.

One species, Amblyrhiza inundata, is estimated to have weighed between 50 and 200 kg (110 and 440 lb), reaching the weight of an eastern gorilla.

Heptaxodontidae contains no living species and the grouping seems to be paraphyletic[1] and arbitrary, however.

One of the smaller species, Quemisia gravis, may have survived as late as when the Spanish began to colonize the Caribbean.

[2] Despite the vernacular name, heptaxodontids are not closely related to the extant hutias of the family Echimyidae.