The huge skull from near Mercedes was named Toxodon by Owen, and he showed that the "enormous gnawing tooth" from the cliffs of the Carcarañá River was a molar from this species.
O enorme cranio atopado preto de Mercedes foi nomeado como Toxodon por Owen, que mostrou que o "enorme dente rillador" dos cantís do río Carcarañá era un molar desta especie.