Family Cystiscidae – “margin-shells” Cystiscus alternans Cystiscus angasi Cystiscus bucca Cystiscus connectans Cystiscus cratericula Cystiscus cymbalum Cystiscus flindersi Cystiscus freycineti Cystiscus halli Cystiscus incertus Cystiscus indiscretus Cystiscus minutissimus Cystiscus obesulus Cystiscus subauriculatus Cystiscus thouinensis Cystiscus tomlinianus Gibberula agapeta Gibberula diplostreptus Gibberula pulchella Gibberula subbulbosa
