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