Keywords: Thoburnia rhothoeca.jpg Thoburnia rhothoeca Photo by Noel Burkhead http //cars er usgs gov/pics/nativefish/nativefish/nativefish_34 html Public domain see http //cars er usgs gov/Information_Technology/Disclaimer/disclaimer html Information presented on this website is considered public information and may be distributed or copied PD-USGov Thoburnia rhothoeca |