Mammut americanum arm bones (left humerus and ulna with radius)

Mammut americanum arm bones (left humerus and ulna with radius)
Photographer: © The Field Museum_PM3945_PM1173_Mammut_americanum_Sanzenbacher

Mastodon (Mammut americanum) left humerus (specimen from Indiana);  ulna and radius (from another specimen); with Kenneth D. Angielczyk, Ph.D., Assistant Curator of Paleomammalogy, Department of Geology, Field Museum of Natural History