Nanina (Microcystis) Beck, 1837 Dataset ZooBank Rank GENUS Published in Beck, H. 1837. Index molluscorum praesentis aevi musei principis augustissimi Christiani Frederici. H. Beck , Hafniae.: 1-124. Classification genus Philonesia Name Homonyms Nanina (Microcystis) Beck, 1837 Microcystis Beck, 1837 Microcystis Beck, 1837 Microcystis Beck, 1837 Microcystis Beck, 1837 Microcystis Beck, 1837 Microcystis Beck, 1837 Microcystis Beck, 1837