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This is an eagle ray toothplate from the Suwannee River. Most often, these toothplates are disarticulated into single teeth. Note the wear on the occlusal surface, probably from crushing hard-shelled food items. Family MYLIOBATIDAE Subfamily MYLIOBATINAE Myliobatis sp. Late Oligocene Suwannee Limestone Suwannee County, Florida (This image is best viewed by clicking on the button on the upper right of this page => "other sizes" => "large".)
© Harry Pristis 2015
BusyEagle and I ventured out to the Potomac River Miocene/Eocene cliffs today to take advantage of the warm weather. Shortly after arriving the rains came down and drenched us. We toughed it out for a while, and just before turning back I spotted this in the cliff (sorry about the blurriness of this pic). Here is what it looks like after partial prep: Seven rows with two rows of side teeth, about 1.5 inches long. I will probably take it out of the matrix to expose the other side. This is my first ray plate from this bed in 25 years of collecting.