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