Haplomastodon is an extinct genus of proboscidea endemic to South America during the Pleistocene from 1.810 Ma—11,000 years ago, living for approximately 1.789 million years.It had two tusks on either side of a trunk like other members of Gomphotheriidae. Its apparent range was from Venezuela southward to Argentina where fossils were recovered in the Suelo Formation, a quarry dig in Corrientes Province. It may have shared its habit with Notiomastodon based on genus age and geography.