This is a partial maxilla (jaw bone) of a dugong (likely Metaxytherium Floridanum). This specimen was recovered from Miocene deposits (approx. 20,000,000+ years ago) in the Peace River of Florida, Bone Valley Formation, Hawthorn Group.
Refer to the photo. The black centimeter cube is shown for scale and is not included. You are purchasing the specimen shown. Your purchase will include a specimen ID label.