Mammalia - Proboscidea - Gomphotheriidae

Alternative combinations: Mastodon mirificus, Rhabdobunus mirificus, Tetralophodon mirificus

Synonyms: Mastodon successor Cope 1892, Stegomastodon arizonae Gidley 1926, Stegomastodon rexroadensis Woodburne 1961, Stegomastodon successor Cope 1892, Stegomastodon texanus Osborn 1924

Belongs to Stegomastodon according to J. Shoshani and P. Tassy 1996

Sister taxa: Stegomastodon aftoniae, Stegomastodon nebrascensis, Stegomastodon platensis, Stegomastodon primitivus, Stegomastodon waringi

Ecology: ground dwelling grazer

Average measurements (in mm): m1 112.2 x 71.3