Found the fossil pictured below in the Peace River, FL yesterday. My first thought on pulling it out of the sifter was osteoderm. The squareness of the object and bone appearance led me to this idea. The thickness and overall size is similar to the rosette shaped ones I have found. Problem is I haven't found any examples of a similar shaped glyptodont osteoderm. The specimen is too thick to fall into the giant armadillo range. Could it be a partial glyptodont or is it just something else. Maybe turtle? Any input/ideas are appreciated.
Specimen in inches - 2 1/8" x 2" x 7/8"
In millimeters - 60mm x 55mm x 25mm