Eurypterus remipes, with frame, Siluria Ouranosaurus Our Lithostrotionella is from the

Our Lithostrotionella is from the Mississippian Period (350 million years) of West Virginia

The torso was relatively short

Official West Virginia State Gemstone

The latter seem to have changed little in structure and appearance since then

interesting bone fragment can be seen in the matrix

Eurypterus remipes, with frame, Siluria Ouranosaurus Our Lithostrotionella is from theEurypterids, or water scorpions, were aquatic predators that thrived until the end of the Paleozoic Era for about 250 million years. Eurypterids primarily lived in brackish water in lagoons and estuaries, feeding on everything from mollusks to primitive fish. According to fossil trackways found in Australia, eurypterids could also spend time on land, and were likely the first animals to leave the water. Eurypterids are part of an extinct order of