? ambiguum Walcott, 1884 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Mollusca class Gastropoda family Pycnomphalidae Name Homonyms ? ambiguum Pax ? ambiguum Ach. ? ambiguum Brandt, 1872 ? ambiguum Fucini, 1900 ? ambiguum Gaudry, 1890 ? ambiguum Walcott, 1884