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