Trimerorhachis_Amphibian Fossil Skull

I took this photo at the Smithsonian Natural History Museum. I selected the skull (to eliminate the shadow), pasted this in a blank 1024x768 Photoshop Elements 9 canvas, and put the Filter Forge frame "Frame Keyline" around it to exhibit it better.

According to the Smithsonian description card, this amphibian is from the early Permian, about 260 million years ago. It is Trimerorhachis, a completely aquatic amphibian.

I haven't labelled this as stock, but feel free to use this as wallpaper, or to make a brush or png of it.