English: Stegomastodon (left) and Notiomastodon (right)

S. mirificus NMNH 10707

sex male age 30 humerus 850* femur 1010 size group – pelvis 1475

260 cm • 4.7 t

N. platensis MECN 82

size group – pelvis 1500 sex male humerus 866 age 35 femur 965

252 cm • 4.4 t

All the skeletal restorations are presented on the same scale (1/100). The human figure is 180 cm tall. Mass estimates are in kilograms for small proboscideans and in tonnes for the larger forms. Shoulder heights are in cm. The age (years), sex, size group, femur and humerus greatest length (mm) (in the case of * it refers to the humerus articular length in mm) and pelvis breadth (mm) are included.