This specimen was found in an area with a lot of Dugong rib bone and other fragments. Initially I tossed on the river bank with the pieces I didn't intend to keep. Taking a second look I thought it could be an ear bone of some type. After a lot of searching on this site I think it most resembles Sirenian ear bone and I am hoping for confirmation or redirection on what it is. Thanks for any help you all can provide.