(Phys.org)—A team of researchers from the U.K. and the U.S. has identified the remains of a 430-million-year-old extinct echinoderm found in a fossil bed in Herefordshire, England. In their paper published in Proceedings of the Royal Society B, the group explains their study of the specimen, which they note is the first example ever found of an extinct echinoderm with preserved tube feet. They have named it Heropyrgus disterminus.