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Michael Lashley posted an update in the group
What is it? 3 years, 3 months ago 3 years, 3 months ago3 years, 3 months agoDoes anyone know what fossil this may be? Found in the Cooper River in South Carolina. Has a definite articular surface on the short side and is grooved on one surface only, smooth on the other surface.
Too dark to tell in the photo. My guess is stingray barb.
That might be a sting ray barb