CONTENTS Introduction................... 3 Systematic list of associate records............. 6 Protozoa................... 7 Coelenterata.................. 31 Platyhelminthes................. 32 Mesozoa................... 41 Nematoda................... 42 Rotatoria................... 43 Entoprocta................... 44 Annelida................... 44 Tardigrada................... 58 Arthropoda.................. 59 Mollusca................... 81 Bryozoa................... 90 Hemichordata.................. 91 Chordata................... 91 Schizomycetes.................. 92 Cyanophyta.................. 92 Chlorophyta.................. 92 Incertae sedis.................. 92 List of collecting localities............... 93 Alphabetic list of the host species and their associates........ 94 Host-associate relationships............... 108 Acknowledgements................. 112