They were some of the heaviest creatures ever to walk the earth. Titanosaurs included "Saltasaurus", "Isisaurus", "Argentinosaurus" and "Paralititan". The group includes the largest land animals known to have existed, such as "Patagotitan" estimated at long with a weight of and the comparably sized "Argentinosaurus" and "Puertasaurus" from the same region. They were named after the mythological Titans of Ancient Greece.