Wills, M. A. 1998 Cambrian and Recent disparity: the picture from priapulids Paleobiology 24 177-199 Kinorhyncha Loricifera Acanthopriapulus Ancalagon Cricocosmia Fieldia Halicryptus Louisella Maccabeus Maotianshania Meiopriapulus Ottoia Palaeoscolex Priapulites Priapulopsis Priapulus Scolecofurca Selkirkia Tubiluchus Osteology Maximum Parsimony Based on reanalysis of the original matrix. Wills_1998ba