Nucula Eois nucula Elachista nucula Helix nucula Bulimulus nucula Nucula crystallina Nucula proxima Nucula nitidula Nucula delphinodonta Chondrilla nucula Nucula nitidulaformis Nucula tenuis Nucula certisinus Nucula recens Nucula dunedinensis Nucula gallinacea Nucula atacellana Nucula rossiana Concavodonta Linucula hartvigiana Similodonta