Notiomastodon is an extinct genus of trunked mammals (a distant relative to modern elephants), only found in South America from the Pleistocene to the Holocene.
Notiomastodon is an extinct proboscidean genus of gomphotheres (a distant relative to modern elephants) endemic to South America from the Pleistocene to the Holocene. It was among the last known gomphotheres and one of two South American gomphotheres alongside Cuvieronius, and was the predominant gomphothere on the continent ranging widely over most of South America excluding the high Andes. In addition to their enormous size, later proboscideans are distinguished by tusks and long, muscular trunks; these features were less developed or absent in the smaller early proboscideans. The Proboscidea (/prbsdi/, from the Greek  and the Latin proboscis) are a taxonomic order of afrotherian mammals containing one living family (Elephantidae) and several extinct families. 
