Stegomastodon

Stegomastodon Temporal range: Pliocene-Early Pleistocene ~4–1.2 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
S. mirificus fossil at the Smithsonian Natural History Museum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Proboscidea
Family:	†Gomphotheriidae
Genus:	†Stegomastodon Pohlig, 1912
Species
†S. aftoniae †S. mirificus †S. nebrascensis †S. primitivus
Synonyms
Morrillia

Stegomastodon ('roof breast tooth') is an extinct genus of gomphotheres. It ranged throughout North America from the Pliocene (early Blancan ~4 Ma), to the Early Pleistocene (early Irvingtonian, ~1.2 Ma). The former South American species have been synonymized with Notiomastodon platensis.