A draft assembly of the <i>Priapulus caudatus</i> genome sequence is expected. A BAC library is already under construction and a ~6X BAC end-sequencing will be performed. <p>This project is part of a sequencing proposal submitted by an international group of universities whose main goal is to elucidate the evolutionary relationships within the Ecdysozoa. Sequencing of a total of 5 Ecdysozoa species will be undertaken at the Washington University Genome Sequencing Center.