The highly-diverse Middle Ordovician fossil site at Castle Bank, Wales, is directly comparable with the famous Burgess Shale and Chengjiang biotas in paleoenvironment and preservational style. The site is nearly 462 million years old and includes animals with morphologies similar to the iconic Cambrian species Opabinia, Yohoia and Wiwaxia, combined with early examples of more derived groups. Reconstruction of the Castle Bank community; sponge in foreground...
